Ryan O’Hayre

Professor, Metallurgical and Materials Engineering

Ryan O'Hayre

Current CV

Education

  • PhD, Materials Science and Engineering, Stanford University
  • MS, Materials Science and Mineral Engineering, Stanford University
  • BS, Metallurgical and Materials Engineering, Colorado School of Mines

Professional Experience

COLORADO SCHOOL OF MINES
  • Professor, 2014 to present
  • Associate Professor, 2010 to 2014
  • Assistant Professor, 2006 to 2010
TECHNICAL UNIVERSITY OF DELFT, THE NETHERLANDS
  • NSF International Fellow, Department of Applied Inorganic Chemistry
STANFORD UNIVERSITY
  • Acting Assistant Professor, Department of Mechanical Engineering, 2004 to 2006
  • Graduate Research Assistant, Department of Materials Science Engineering, 1999 to 2004 (Thesis Advisor: Fritz B. Prinz)

Scientific and Professional Societies

  • The Electrochemical Society
  • Materials Research Society
  • International Society of Solid State Ionics
  • American Ceramics Society

Honors and Awards

  • Ross Cofin-Purdy Award- Most valuable contribution to the ceramics technical literature over the previous two years- American Ceramics Society, 2017
  • Research Excellence Award- Colorado School of Mines, 2015
  • Finalist, Young Scientist Award- International Society for Solid-State Ionics, 2013
  • Visiting Senior Professorship for International Scientists- Chinese Academy of Sciences, 2012
  • CSM Alumni Teaching Award- For Sustained Instructional and Pedagogical Excellence at the Colorado School of Mines, 2012
  • Frontiers of Science Kavli Fellow, 2011
  • ASM Bradley Stoughton Award for Young Teachers, ASM International, 2010
  • Outstanding Faculty Award, Dept of Metallurgical and Materials Engineering, CSM, 2010
  • Presidential Early Career Award for Science and Engineering, White House, 2009
  • Outstanding Faculty Award, Department of Metallurgical and Materials Engineering, Colorado School of Mines, 2009
  • Army Young Investigator Award, DoD ARO, 2007
  • International Postdoctoral Research Fellowship, National Science Foundation, 2005-2006
  • Pan-American Advanced Studies Institute Fellow, Materials for Energy Conversion and Environmental Protection, Rio De Janeiro, Brazil, 2003
  • Stanford Graduate Fellowship, Stanford University, 1999-2002
  • O. Cutler Shepard Award for the outstanding materials science MS student, Stanford University, 2001
  • Boettcher Scholar, Boettcher Foundation, State of Colorado, 1996-1999
  • Stuart, Herbert Z. Endowed Scholarship, Colorado School of Mines, 1998
  • Tucker (Metallurgy) Scholarship, Colorado School of Mines, 1997
  • Dean’s List, Colorado School of Mines, 1996-1999 (all years)

Publications

* indicates since arrival at Mines

Books and Book Chapter

  • *Ryan O’Hayre, Suk-Won Cha, Whitney Colella, Fritz B. Prinz, (2009). Fuel Cell Fundamentals, 3rd Edition. New York, New York: John Wiley and Sons, Inc. ISBN-13: 9781119113805
  • *Ryan O’Hayre, (2015). Materials Kinetics Fundamentals, New York, New York: John Wiley and Sons, Inc. ISBN-13: 978-1-118-97289-2
  • *P. Periasamy, J.J. Berry, D.S. Ginley, P.A. Parilla and R.P. O’Hayre, (2013) “Point-Contact Metal-Insulator-Metal Architecture: A Facile Approach For Materials Screening Studies and Beyond”, in Rectenna Solar Cells, Garret Moddel and Sachit Grover (eds.), Springer. ISBN 978-1-4614-3715-4
  • *W. Lee, M. Lee, R. O’Hayre, F. Prinz, (2013) “Nanoscale Electrochemistry in Energy Related Systems using Atomic Force Microscopy”, in Scanning Probe Microscopy for Energy Research: Materials, Devices, and Applications, World Scientific. ISBN-13: 978-9814434706
  • *Jianhua Tong and Ryan O’Hayre, (2010) “Mixed Ionic and Electronic Conducting Ceramic Membranes for Oxygen Permeation”, in Membranes for Membrane Reactors, John Wiley and Sons, Inc. ISBN: 978-0-470-74652-3
  • *Ryan O’Hayre, Suk-Won Cha, Whitney Colella, Fritz B. Prinz, (2009). Fuel Cell Fundamentals, 2nd Edition. New York, New York: John Wiley and Sons, Inc.
  • *Ryan O’Hayre, (2009). Probing Electrochemistry at the Micro Scale: Applications in Fuel Cells, Ionics, and Catalysis. Berlin, Germany: VDM Verlag, Inc.
  • *Ryan O’Hayre, Minhwan Lee, Fritz B. Prinz, Sergei Kalinin, (2007). “Frequency Dependent Transport Imaging by Scanning Probe Microscopy”. In Scanning Probe Microscopy: Electrical and Electromechanical Phenomena at the Nanoscale, Volume 1. A. Gruverman and S. V. Kalinin (Eds.), Springer Verlag, New York, New York.
  • Ryan O’Hayre, Suk-Won Cha, Whitney Colella, Fritz B. Prinz, (2006). Fuel Cell Fundamentals. New York, New York: John Wiley and Sons, Inc.

 

Journal Publications

  • *Robert Kee, Huayang Zhu, Benjamin Kee, Canan Karakaya, Ryan O’Hayre, “Equilibrium thermodynamic predictions of coking propensity in membrane-based dehydrogenation of hydrocarbons and alcohols”, accepted, Cat. Today. (https://doi.org/10.1016/j.cattod.2017.10.036)
  • *M. Dzara, J. Christ, P. Joghee, C. Ngo, C. Cadigan, G. Bender, R. Richards, R. O’Hayre, S. Pylypenko, “Oxygen reduction catalysts based on La and Al co-doped CaMnO3 perovskite oxides: from interplay of surface properties to AEMFC performance, J. Power Sources, 375, 265-276 (2018) (https://doi.org/10.1016/j.jpowsour.2017.08.071)
  • *L. Bian, C. Duan, L. Wang, R. O’Hayre, J. Cheng, N. Chen, F. Li, K.C. Chou, “Ce-doped La0.7Sr0.3Fe0.9Ni0.1O3-δ as Symmetric Electrode for High Performance Direct Hydrocarbon Solid Oxide Fuel Cell, J. Mater. Chem. A., 5, 15253-15259 (2017). DOI: 10.1039/C7TA03001K
  • *X. Cui, R. O’Hayre, S. Pylypenko, L. Chen, J. Shi, “Mesoporous Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite as an Efficient Pt-Free Electrode Catalyst for Oxygen Reduction Reaction”, Dalton Transactions, 46(40) 13903 (2017). DOI 10.1039/C7DT03082G
  • *T. Park, I. Chang, J.H Jung, H.B. Lee, S.H. Ko, R. O’Hayre, S.J. Yoo, S.W. Cha, “Effect of Assembly Pressure on the Performance of a Bendable Polymer Electrolyte Fuel Cell Based on a Silver Nanowire Current Collector”, Energy, 134, 412-419, (2017). https://doi.org/10.1016/j.energy.217.05.197
  • Duan, D. Hook, Y. Chen, J. Tong, R. O’Hayre, “Zr and Y co-doped perovskite as a stable, high performance cathode for solid oxide fuel cells operating below 500 °C”, Energy & Environmental Science, 10, 176–182 (2017) DOI: 10.1039/C6EE01915C
  • *D.R. Clark, H. Zhu, D.R. Diercks, S. Ricote, R.J. Kee, A. Almansoori, B.P. Gorman, R. O’Hayre, “Probing Grain-Boundary Chemistry and Electronic Structure in Proton-Conducting Oxides by Atom Probe Tomography”, Nano Letters, 16(11), 6924-6930, (2016) DOI: 10.1021/acs.nanolett.6b02918
  • *J.M. Christ, Ngo, T. Batson, C.A. Cadigan, J. Tong, R.M. Richards, R. O’Hayre, and S. Pylypenko, “Synthesis of High Surface Area CaxLa(1-x)Al(1-x)MnxO(3-δ) Perovskite Oxides for Oxygen Reduction Electrocatalysis in Alkaline Media”, Catalysis Science and Technology, 6(21), 7744-7751-2016
  • *S. Nikodemski, A.A. Dameron, J.D. Perkins, R.P. O’Hayre, D.S. Ginley, J.J. Berry, “The Role of Nanoscale Seed Layers on the Enhanced Performance of Niobium doped TiO2 Thin Films on Glass”, Sci. Reports, 6, 32830 (2016) DOI: 10.1038/srep32830
  • *R. Osgood III, S. Giardini, J. Carlson, P. Periasamy, H. Guthrey, R. O’Hayre, M. Chin, B. Nichols, M. Dubey, G. E. Fernandes, J. H. Kim, J. Xu, P. Parilla, J. Berry, D. Ginley, “Conduction and rectification in NbOx- and NiO-based metal-insulator-metal diodes”, J. Vac. Sci.and Tech.A., 34(5), 051514 (2016) DOI: 10.1116/1.4960962
  • Nikodemski, C. Duan, J. Tong, R. O’Hayre, “Ionic Transport Modification in Proton Conducting BaCe0.6Zr0.3Y0.1O3-δ with Transition Metal Oxide Dopants”, Solid State Ionics, 294, 37-42 (2016). http://dx.doi.org/10.1016/j.ssi.2016.06.020
  • *K.N. Wood, S.T Christensen, D. Nordlund, A.A. Dameron, C. Ngo, H. Dinh, T. Gennett, R. O’Hayre, S. Pylypenko, “Spectroscopic investigation of nitrogen‐functionalized carbon materials”, Surface and Interface Analysis, 48 (5), 283–292 (2016). DOI: 10.1002/sia.6017
  • *D.R. Diercks, J. Tong, H. Zhu, R.J. Kee, G. Baure, J.C. Nino, R. O’Hayre, B.P. Gorman, “Quantification of 3-D Space Charge Effects at Individual Oxide Grain Boundaries by Atom Probe Tomography”, J. Mater. Chem. A, 4, 5167-5175 (2016). DOI: 10.1039/C5TA10064J
  • *A. M. Deml, R. O’Hayre, C. Wolverton, V. Stevanovic, “Predicting DFT total energies and enthalpies of formation of metal-nonmetal compounds by linear regression”, Phys. Rev. B. 93, 085142, (2016).
  • *Y. Liu, X. Zhu, M. Li, R. O’Hayre, W. Yang, “Nanoparticles at grain boundaries inhibit the phase transformation of perovskite membrane”, Nano Letters, 15 (11), 7678-7683 (2015).
  • *K.J. Albrecht, C. Duan, R. O’Hayre, R.J. Braun, “Modeling Intermediate Temperature Protonic Ceramic Fuel Cells”, ECS Transactions 68 (1), 3165-3175 (2015).
  • J, Ha, R. O’Hayre, J. Kim, and H. Lee, “Local atomic structure analysis of x(Na0.5K0.5)NbO3(1-x)BaTiO3 using x-ray absorption fine structure spectroscopy, Ceramics International, 41(9), 12027-12031 (2015).
  • *C. Duan, J. Tong, M. Shang, S. Nikodemski, M. Sanders, S. Ricote, A. Almonsoori, R. O’Hayre, “Readily Processed Protonic Ceramic Fuel Cells with High Performance at Low Temperatures”, Science, 349 (6254), 1321-1326 (2015).
  • *K. N. Wood, A. A. Dameron, P. Joghee, G. Bender, R. O’Hayre and S. Pylypenko, “Nitrogen Post-Modification of PtRu/Carbon Catalysts for Improved Methanol Oxidation Reaction Performance in Alkaline Media”, J. Electrochem. Soc. 162 (8), F913018 (2015)
  • *P. Joghee, J. Nekuda Malik, S. Pylypenko, R. O’Hayre, “A review on direct methanol fuel cells – in the perspective of energy and sustainability”, MRS Energy and Sustainability, 2, E3 (2015)
  • *A. M. Deml, A. M. Holder, R. P. O’Hayre, C. B. Musgrave, and V. Stevanović, “Intrinsic Material Properties Dictating Oxygen Vacancy Formation Energetics in Metal Oxides”, J. Phys. Chem. Lett., 6, 1948−1953 (2015)
  • *J.S. Fish, S. Ricote, R. O’Hayre, N. Bonanos, “Hydrogen permeability and electrical properties of the protonic/electronic composite BaCe0.2Zr0.7Y0.1O3-δ/Sr0.95Ti0.9Nb0.1O3-δ (BCZY27/STN95)”, J. Mater. Chem. A. 3, 5392-5401 (2015)
  • *A. Subramaniyan, J.D. Perkins, R.P. O’Hayre, D.S. Ginley, S. Lany, A. Zakutayev, “Non-equilibrium synthesis, structure and opto-electronic properties of Cu2-2xZnxO alloys”, J. Mater. Sci. 50(3), 1350-1357 (2015)
  • *A. Deml, V. Stevanovic, A. Holder, M. Sanders, R. O’Hayre, and C. Musgrave, “Tunable oxygen vacancy formation energetics in the complex perovskite oxide SrxLa1-xMnyAl1-yO3”, Chem. Mater. 26(22), 6595-6602 (2014).
  • *J. Ryu, R. O’Hayre, H. Lee, “Structural analysis and electrochemical properties of cobalt-doped Sr0.9Ce0.1MnO3-δ cathode for IT-SOFCs”, J. Mater. Res. 29 (22), 2667-2672 (2014).
  • *A.H. McDaniel, A. Ambrosini, E.N. Coker, J.E. Miller, W.C. Chueh, R. O’Hayre, J. Tong, “Nonstoichiometric perovskite oxides for solar Thermochemical H2 and CO Production.” Energy Procedia, 49, 2009-2018 (2014).
  • *T. Tauer, R. O’Hayre, and W. Medlin, “Ab-initio investigation of proton stability at BaZrO3 interfaces, Chem. Mater. 26 (17), 4915-4924 (2014).
  • *J. Ryu, R. O’Hayre, H. Lee, “Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells”, Solid State Ionics, 260, 60-64 (2014).
  • *A. Deml, V. Stevanovic, C. Muhich, C. Musgrave, R. O’Hayre, “Oxide enthalpy of formation and band gap energy as accurate descriptors of oxygen vacancy formation energetics”, Energy and Env. Sci. 7(6), 1996-2004 (2014).
  • *P. Joghee, S. Pylypenko, K. Wood, G. Bender, R. O’Hayre, “High performance alkaline direct methanol fuel cell employing a nitrogen post-doped PtRu/C anode”, ChemSusChem, 7, 1854-1857 (2014).
  • *R. M. Pasquarelli, M. F.A.M. van Hest, P.A. Parilla, J.D. Perkins, R.P. O’Hayre, and D.S. Ginley, “Processing-Phase Diagrams: A New Tool for Solution-Deposited Thin-Film Development Applied to the In5O(OPri)13 – In2O3 System”, J. Mater. Chem. C.2, 2360-2367 (2014).
  • *T. Noh, J. Ryu, R. O’Hayre, and H. Lee, “Effect of Cu doping on the electrochemical properties and structural phases of La0.8Sr0.2Mn1-xCuxO3 (0≤x≤0.2) at elevated temperature”, Solid State Ionics, 260, 30-35 (2014).
  • *A. Subramaniyan, J.D. Perkins, R.P. O’Hayre, S. Lany, V. Stevanovic, D.S. Ginley, A. Zakutayev, “Non-equilibrium Deposition of Phase Pure Cu2O Thin Films at Reduced Growth Temperature”, APL Materials, 2, 022105, pp1-6 (2014).
  • *K. Wood, R. O’Hayre, S. Pylypenko, “Recent Progress on Nitrogen/Carbon Structures Designed for Energy and Sustainability Applications”, Energy and Environmental Science, 7(4), 1212-1249 (2014).
  • Yi Ke, Stephan Lany, Joseph J. Berry, John D. Perkins, Philip A. Parilla, Andriy Zakutayev,
  • Tim Ohno, Ryan O’Hayre, David S. Ginley, “Enhanced Electron Mobility due to Dopant-Defect Pairing in Conductive ZnMgO”, Advanced Functional Materials, 24(19), 2875-2882 (2014).
  • *D. Clark, J. Tong, A. Morrissey, A. Almonsoori, I. Reimanis, and R. O’Hayre, “Anomalous low-temperature proton conductivity enhancement in a novel protonic nanocomposite”, Phys. Chem. Chem. Phys., 16 (11), 5076 – 5080, (2014)
  • *April R. Corpuz, Kevin N. Wood, Svitlana Pylypenko, Arrelaine Dameron, Prabhuram Joghee, Tim Olson, Guido Bender, Huyen Dinh, Thomas Gennett, Ryan Richards, Ryan O’Hayre, “Effect of Nitrogen Post-Doping on a Commercial Platinum-Ruthenium/CarbonAnode Catalyst”, J. Power Sources, 248, 296-306 (2014).
  • *P. Joghee, S. Pylypenko, K. Wood, A. Corpuz, G. Bender, H. Dinh, R. O’Hayre, “Improvement of DMFC performance by treating the anode at high anodic potential”, J. Power Sources, 245, 37-47 (2014).
  • *S. Nikodemski, J. Tong, R. O’Hayre, “Solid-state reactive sintering for proton conducting ceramics”, Solid State Ionics, 253, 201-210 (2013).
  • *S. Pylypenko, A. Borisevich, K. L. More, A. Corpuz, T. Holme, A. A. Dameron, S. Olson, H.N. Dinh, T. Gennett, and R. O’Hayre, “Nitrogen: Unraveling the secret to stable carbon-supported Pt-alloy electrocatalysts”, Energy and Environ. Sci.6,2957-2964 (2103).
  • Chin, P. Periasamy, T. O’Regan, M. Amani, C. Tan, R. M. Osgood, R. P. O’Hayre, J. J. Berry, P. A. Parilla, D. S. Ginley, and M. Dubey “Planar Metal-Insulator-Metal Diodes based on the Nb/Nb2O5/X Material
  • System”, J. Vac. Sci. and Tech. B. 31(5), 051204/1-8 (2013).
  • *M.D. Sanders, R. O’Hayre, H. Zhu, R.J. Kee, “Model-based characterization of charged-defect transport and apparent gas-phase permeation in mixed-conducting perovskite membranes”, Solid State Ionics, 249-250, 6-16 (2013).
  • *M. Shang, J. Tong, and R. O’Hayre, “A promising cathode for intermediate temperature protonic ceramic fuel cells: BaCo0.4Fe0.4Zr0.2O3-δ”, RSC Advances, 3, 15769-15775 (2013).
  • *Y. Zhao, Y. Zhou, R. O’Hayre, Z. Shao, “Electrocatalytic oxidation of methanol on Pt catalyst supported on nitrogen-doped graphene induced by hydrazine reduction”, J. Phys. Chem. Sol., 74 (11), 1608 – 1614 (2013)
  • *J.S. Fish, S. Ricote, T. Holgate, F. Lenrick, R. Wallenberg, R. O’Hayre, N. Bonanos, “Synthesis by Spark Plasma Sintering of a BaCe0.2Zr0.7Y0.1O3-d/Sr0.95Ti0.9Nb0.1O3-d (BCZY27/STN95) Composite Material for Hydrogen Separation Membranes”,J.Mater. Sci., 48, 6177-6185 (2013).
  • *A.H. McDaniel, E.C. Miller, D.Arifin, A. Ambrosini, E.N. Coker, R. O’Hayre, W.C. Chueh, and J. Tong, “Sr- and Mn-doped LaAlO3-δ for Solar Thermochemical H2 and CO Production”, Energy and Environmental Science, 6, 2424-2428, (2013).
  • *T. Olson, A. A. Dameron, K.N. Wood, S. Pylypenko, K. E. Hurst, S.T. Christensen, J. S. Bult, D. S. Ginley, R. O’Hayre, H.N. Dinh, T. Gennett, “Enhanced Fuel Cell Catalyst Durability with Nitrogen Modified Carbon Supports”, Journal of theElectrochemical Society, 160(4), F389-F394 (2013).
  • *P. Periasamy, M.S. Bradley, P.A. Parilla, J.J. Berry, D.S. Ginley, R.P. O’Hayre and C.E. Packard, “Electromechanical tuning of nanoscale MIM diodes by nanoindentation”, J. Mater. Res., 28(14), 1912-1919 (2013)
  • *M. Shang, W. Wang, S. Sun, E. Gao, Z. Zhang, L. Zhang and R. O’Hayre, “The design and realization of a large-area flexible nanofiber-based mat for pollutant degradation: an application in photocatalysis”, Nanoscale, 5, 5036–5042 (2013)
  • *P. Periasamy, H.L. Guthrey, A.I. Abdulagatov, P.F. Ndione, J.J. Berry, D.S. Ginley, S.M. George, P.A. Parilla*, R.P. O’Hayre, “Metal-Insulator-Metal Diodes: Role of the Insulator Layer on the Rectification Performance”, Advanced Materials, 25(9), 1301-1308 (2013)
  • *Y. Zhao, Y. Zhou, B. Xiong, J. Wang, X. Chen, R. O’Hayre, Z. Shao, “Facile single-step preparation of Pt/N-graphene catalysts with improved methanol electrooxidation activity”, J. Solid State Electrochem., 17(4), 1089-1098 (2013)
  • *T. Tauer, R. O’Hayre, and W. Medlin, “Computational investigation of defect segregation at the (001) surface of BaCeO3 and BaZrO3: The role of metal-oxygen bond strength in controlling vacancy segregation”, J. Mater. Chem. A, 1(8), 2840-2846(2013)
  • *J. Wang, Y. Zhou, Y. Hu, R. O’Hayre, and Z. Shao, “Facile synthesis of porous nanocrystalline TiO2 with high rate performance”, Journal of Materials Science, 48(6), 2733-2742 (2013).
  • Xiong, Y. Zhou, R. O’Hayre, Z. Shao, “Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts”, Applied Surface Science, 266, 433-439 (2013).
  • *R. Kee, H. Zhu, B. Hildenbrand, E. Vollestad, M. Sanders, and R. O’Hayre, “Modeling the steady-state and transient response of polarized and non-polarized proton-conducting doped-perovskite membranes”, J. Electrochem. Soc. 160 (3), F290-F300(2013).
  • *B. Xiong, Y. Zhou, Y. Zhao, J. Wang, X, Chen, R. O’Hayre, and Z. Shao, “The use of nitrogen-doped graphene supporting Pt nanoparticles as a catalyst for methanol electrocatalytic oxidation”, Carbon, 52, 181-192 (2013).
  • *M. Shang, J. Tong, R. O’Hayre, “A novel wet-chemistry method for the synthesis of multicomponent nanoparticles: A case study of BaCe0.7Zr0.1Y0.1Yb0.1O3−δ”, Materials Letters, 92, 382 (2013)
  • *K. N. Wood, S. Pylypenko, T.S. Olson, A.A. Dameron, K. O’Neil, S.T. Christensen, H.N. Dinh, T. Gennett, and R. O’Hayre, “The Effect of Halide-Modified Model Carbon Supports on Catalyst Stability”, ACS Applied Materials and Interfaces, 4(12),6727-6733 (2012).
  • *P. Joghee, S. Pylypenko, T.S. Olson, A. A. Dameron, A. R. Corpuz, H. N. Dinh, K. Wood, K. J. O’Neill, K. E. Hurst, G. Bender, T. Gennett, B. S. Pivovar, R. P. O’Hayre, “Enhanced Stability of PtRu Supported on N-Doped Carbon for the Anodeofa DMFC”, Journal of The Electrochemical Society, 159 (11) F768-F778 (2012)
  • *B.J. Simonds, A. Subramaniyan, R. O’Hayre, and P.C. Taylor, “Conduction Electron Resonance used to Determine Size of Palladium Nanoparticles in Proton Conducting Ceramics”, J. Magnetic Resonance, 255, 58-61 (2012)
  • *J. Fish, C. Ping Li, J.D. Fehribach, C.A. Wolden, R. O’Hayre, A. L. Bunge, and C. E. Goodyer, “Poisson-Boltzmann Model of Space Charge Layer Effects on Conductivity in Randomly Distributed Nanoionic Composites”, Electrochimica Acta, 83,454-463-2012
  • *K. N. Wood, S.T. Christensen, T.S. Olson, A.A. Dameron, S. Pylypenko, K.E. Hurst, H.N. Dinh, T. Gennett, and R. O’Hayre, “In-Situ Small Angle X-ray Scattering Analysis of Improved Catalyst-Support Interactions through Nitrogen Modification”, MRS Communications, 2, 85-89 (2012)
  • *W. Lee, F. B. Prinz, X. Chen, S. Nonnenmann, D.A. Bonnell, and R.P. O’Hayre “Nanoscale impedance and complex properties in energy-related systems”, MRS Bulletin, 37(07), 659-667 (2012)
  • *A. R. Corpuz, T.S. Olson, P. Joghee, S. Pylypenko, A. A. Dameron, H. N. Dinh, K. J. O’Neill, K. E. Hurst, G. Bender, T. Gennett, B. S. Pivovar, R. M. Richards, R. P. O’Hayre, “Effect of a nitrogen-doped PtRu/carbon anode catalyst on the durability of a direct methanol fuel cell”, J. Power Sources, 217, 142 (2012)
  • *A. Deml, A. L. Bunge, M. A. Reznikov, A. Kolessov, and R. P. O’Hayre, “Progress towards a solid-state ionic field effect transistor”, J. Appl. Phys., 111, 075411 (2012)
  • *J. Tong, D. Clark, A. Subramaniyan, H. Guthrey, D. Clark, B.P. Gorman, R. O’Hayre, “Electrical conductivities of ionic composite based on proton-conducting ceramic of yttrium-doped barium zirconate and hydrogen-permeable metal of palladium”,Solid State Ionics, 211, 23-33 (2012)
  • *Y. Ke, J. Berry, P. Parilla, A. Zakutayev, R. O’Hayre, D. Ginley, “The origin of electrical property deterioration with increasing Mg concentration in ZnMgO:Ga”, Thin Solid Films, 520, 3697-3702 (2012)
  • *T. Tauer, R. O’Hayre, J. W. Medlin “A theoretical study of the influence of dopant concentration on hydration properties of yttrium-doped barium cerate”, Solid State Ionics, 204/205, 27-34 (2011)
  • *R. M. Pasquarelli, D.S. Ginley, and R. P. O’Hayre, “Solution Processing of Transparent Conductors: From Flask to Film”, Chem. Soc. Rev. 40 (11), 5406 – 5441, (2011). Invited Review
  • *C. E. Goodyer, J. Fish, J.D. Fehribach, R. O’Hayre, and A. L. Bunge “Modeling Space Charge Layer Interaction and Conductivity Enhancement in Nanionic Composites”, Electrochimica Acta, 56, 9295-9302 (2011)
  • *A.A. Dameron, T.S. Olson, S.T. Christensen, J.E. Leisch, K.E. Hurst, S. Pylypenko, J.S. Bult, D.S. Ginley, R. O’Hayre, H.N. Dinh, T. Gennett, “Compositional Control of Pt1-xRux Thin Films Sputtered from a Single Alloyed Target”, ACS Catalysis,1, 1307-1315 (2011)
  • *P. Periasamy, J.J. Berry, A.A. Dameron, J.D. Bergeson, D.S. Ginley, R. P. O’Hayre, and P.A. Parilla, “Fabrication and characterization of MIM diodes based on Nb/Nb2O5 via a rapid screening technique”, Advanced Materials, 23(27), 3080-3085(2011)
  • *A. Dhanda, H. Pitsch, and R. O’Hayre, “Diffusion Impedance Element Model for the Triple Phase Boundary”, Journal of Electrochemical Society, 158(8), B877-B884 (2011)
  • *S. Pylypenko, A.Queen, T. S. Olson, A. Dameron, K. O’Neill, K. Neyerlin, B. Pivovar, H. N. Dinh, D. S. Ginley, T. Gennett, and R. O’Hayre, “Tuning carbon-based fuel cell catalyst support structures via nitrogen functionalization. Part I:Investigation of structural and compositional modification of highly oriented pyrolytic graphite model catalyst supports as a function of nitrogen implantation dose”, J. Physical Chemistry C. 115(28), 13676-13684 (2011)
  • *S. Pylypenko, A.Queen, T. S. Olson, A. Dameron, K. O’Neill, K. Neyerlin, B. Pivovar, H. N. Dinh, D. S. Ginley, T. Gennett, and R. O’Hayre, “Tuning carbon-based fuel cell catalyst support structures via nitrogen functionalization. Part II: Investigation of durability of Pt-Ru nanoparticles supported on highly oriented pyrolytic graphite model catalyst supports as a function of nitrogen implantation dose”, J. Physical Chemistry C. 115(28), 13667-13675 (2011)
  • *A. Subramaniyan, J. Tong, R. O’Hayre, N. M. Sammes, “Sintering Studies on 20 mol% Yttrium Doped Barium Cerate”, J. American Ceramics Society, 94(6), 1800-1804 (2011)
  • *M. Sanders and R. O’Hayre, “Coupled transport and uphill permeation of steam and oxygen in a proton-conducting ceramic membrane”, J. Membrane Sci., 376, 96-101 (2011)
  • *Jie Wang, Y. Zhou, Y. Hu, R. O’Hayre, and Z. Shao, “Facile Synthesis of Nanocrystalline TiO2 Mesoporous Microspheres for Lithium-ion Batteries”, J. Physical Chemistry C, 115 (5), 2529-2536 (2011).
  • *J. Tong, D. Clark, L. Bernau, R. O’Hayre, “Optimization of proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method”, Solid State Ionics, 181, 1486-1498 (2010).
  • *Y. Zhou, K. Neyerlin, T. Olson, S. Pylypenko, J. Bult, H. Dinh, T. Gennett, Z. Shao, R. O’Hayre, “Enhancement of Pt and Pt-Alloy Fuel Cell Catalyst Activity and Durability via Nitrogen-Modified Carbon Supports”, invited review, Energy andEnvironmental Science, 3, 1437-1446 (2010).
  • *Y. Zhou, J. Wang, Y. Hu, R. O’Hayre, and Z. Shao, “Porous LiFePO4 and Carbon Nanotube Composites”, Chemical Communications, 46, 7151-7153 (2010).
  • *T. Holme, Y. Zhou, R. Pasquarelli, R. O’Hayre, “First principles study of doped carbon supports for enhanced platinum catalysts”, Phys. Chem. Chem. Phys, 12, 9461-9468 (2010).
  • *M. Sanders and R. O’Hayre, “Development of a Multi-Species Transport Space Theory and its Application to Permeation Behavior in Proton Conducting Doped Perovskites”, Journal of Materials Chemistry, 20, 6271-6281 (2010).
  • *J. Tong, D. Clark, L. Bernau, M. Sanders, R. O’Hayre, “Solid-State Reactive Sintering Mechanism for Large-Grained Yttrium-Doped Barium Zirconate with High Total Proton Conductivity”, Journal of Materials Chemistry, 20, 6333-6341 (2010).
  • *S. Pylypenko, A. Queen, K. Neyerlin, T. Olson, A. Dameron, K. O’Neill, D. Ginley, B. Gorman, S. Kocha, H. Dinh, T. Gennett, and R. O’Hayre, “The role of Nitrogen Doping on Durability in the Pt-Ru/HOPG System”, ECS Transactions, 33(1), 351-357, (2010)
  • *R. M. Pasquarelli1, M. F.A.M. van Hest, A. Miedaner, C. J. Curtis, R. O’Hayre, D. S. Ginley, “Solution Synthesis and Characterization of Indium, Zinc, and Indium-Zinc Formate Precursors for Transparent Conducting Oxides, Inorganic Chemistry,49,5424 (2010).
  • *J. Tong, D. Clark, M. Hoban, and R. O’Hayre, “Cost-Effective Solid-State Reactive Sintering Method for High Conductivity Proton Conducting Yttrium-Doped Barium Zirconium Ceramics”, Solid State Ionics, 181, 496-503 (2010)
  • *T. Fabian, R. O’Hayre, S. Litster, F. B. Prinz, J. G. Santiago, “Active Water Management at the Cathode of a Planar Air-breathing PEM Fuel Cell Using and Electroosmotic Pump”, Journal of Power Sources, 195(11), 3640-3644 (2010)
  • *T. Fabian, R. O’Hayre, S. Litster, F. B. Prinz, J. G. Santiago, “Passive Water Management at the Cathode of a Planar Air-breathing PEM Fuel Cell”, Journal of Power Sources, 195(10), 3201-3206 (2010)
  • *B. Babcock, A.J. Tupper, D. Clark, T. Fabian, R. O’Hayre, “Optimization of Air Breathing Fuel Cell Cathodes” Journal of Fuel Cell Technology, 7, 021017-1—021017-11 (2010)
  • *Y. Zhou, R. Pasquarelli, T. Holme, J. Berry, T. Ohno, D. Ginley, R. O’Hayre, “Dopant-induced electronic structure modification of HOPG surfaces: implications for high activity fuel cell catalysts Journal of Physical Chemistry C, 114, 506-515(2010)
  • *Y. Zhou, R. Pasquarelli, T. Holme, J. Berry, D. Ginley, R. O’Hayre, “Improving PEM Fuel Cell Catalyst Activity and Durability Using Nitrogen-Doped Carbon Supports”, Cover Feature—Journal of Materials Chemistry,16(42), 7830-7838, (2009)
  • *J. D. Fehribach and R. O’Hayre, “Triple Phase Boundaries in Solid Oxide Cathodes”, SIAM Journal on Applied Mathematics, 70(2), 510-530 (2009)
  • *J.M. Nekuda Malik, M.F.A.M. van Hest, A. Miedaner, C. Curtis, J. Leisch, P.A. Parilla, M. Kaufman, M.P. Taylor, B.J. Stanbery, R. O’Hayre, D. Ginley, “Atmospheric Pressure Synthesis of In2Se3, Cu2Se and CuInSe2 without External Selenization from Solution Precursors”, Journal of Materials Research, 24(4), 1375 (2009)
  • *A. J. Leenheer, J. D. Perkins, M.F.A.M. van Hest, J. J. Berry, R. P. O’Hayre, and D. S. Ginley “General mobility and carrier concentration relationship in transparent amorphous indium zinc oxide films”, Phys. Rev. B., 77, 115215 (2008)
  • *T. Fabian, R. O’Hayre, F. B. Prinz, J. G. Santiago, “Measurement of Temperature and Reaction Species in the Cathode Diffusion Layer of a Free-Convection Fuel Cell”, J. Electrochem. Soc. 154, B910 (2007)
    -Selected for publication in the July 23, 2007 issue of Virtual Journal of Nanoscale Science & Technology
  • *R. O’Hayre, T. Fabian, S. Litster, F. B. Prinz, J. G. Santiago, “Engineering Model of a Passive Planar Air Breathing Fuel Cell Cathode”, Journal of Power Sources, 167(1), 118-129, (2007)
  • *R. O’Hayre, Marian Nanu, Joop Schoonman, Albert Goosens, “Mott-Schottky and Charge Transport Analysis of Nanoporous Titanium Dioxide Films in Air”, Journal of Physical Chemistry C., 111(12), 4809-4814 (2007)
  • R. O’Hayre, Marian Nanu, Joop Schoonman, and Albert Goosens, “A Parametric Study of TiO2/CuInS2 Nanocomposite Solar Cells: How Cell Thickness, Buffer Layer Thickness, and TiO2 Particle Size Affect Performance”, Nanotechnology, 18 (5), (2007)
  • S. W. Cha, R. O’Hayre, Y.I Park, F. B. Prinz, “Electrochemical Impedance Investigation of Flooding in Micro Flow Channels for Proton Exchange Membrane Fuel Cells”, Journal of Power Sources, 161, 138-142, (2006)
  • T. Fabian, J. D. Posner, R. O’Hayre, S. W. Cha, J. K. Eaton, F. B. Prinz, J. G. Santiago, “The Role of Ambient Conditions on the Performance of a Planar, Air Breathing Hydrogen PEM Fuel Cell”, Journal of Power Sources, 161, 168-182, (2006)
  • R. O’Hayre, Marian Nanu, Joop Schoonman, Albert Goosens, Qing Wang, Michael Grätzel, “The Influence of TiO2 Particle Size in TiO2/CuInS2 Nanocomposite Solar Cells”, Advanced Functional Materials, 16, 1566-1576, (2006)
    -Selected as one of the top 20 “hottest” papers in Adv. Funct. Mater. 2006-2007
  • R. O’Hayre, D.M. Barnett, F.B. Prinz, “The Triple Phase Boundary: A Mathematical Model and Experimental Investigations for Fuel Cells”, Journal of the Electrochemical Society, 152 (2), A439-A444, (2005)
  • R. O’Hayre, G, Feng, W.D. Nix, F.B. Prinz, “Quantitative Impedance Measurement Using Atomic Force Microscopy”, Journal of Applied Physics, 96 (6), 3540, (2004)
    -Selected for publication in a 20047 issue of Virtual Journal of Nanoscale Science & Technology. Profiled by the MIT Technology Review in January, 2005.
  • R. O’Hayre, M. Lee, F.B. Prinz, “Ionic and Electronic Impedance Imaging Using Atomic Force Microscopy”, Journal of Applied Physics, 95 (12), 8382, (2004)
    -Profiled by Molecular Instruments Inc. in a research and applications note in 2005
  • R. O’Hayre, F.B. Prinz, “The Air/Platinum/Nafion Triple Phase Boundary: Characteristics, Scaling, and Implications for Fuel Cells”, Journal of the Electrochemical Society, 151 (5), A756, (2004)
  • M. Lee, R. O’Hayre, T.M. Gur, F.B. Prinz, “Electrochemical Nanopatterning of Ag on Solid-State Ionic Conductor RbAg4I5 Using Atomic Force Microscopy”, Applied Physics Letters, 85 (16), 3552, (2004)
  • S.W. Cha, R. O’Hayre, S. J. Lee, Y. Saito, F. B. Prinz, “The scaling behavior of flow patterns: a model investigation”, Journal of Power Sources, 134 (1), 57, (2004)
  • S.W. Cha, S.J. Lee, R. O’Hayre, Y. Saito, F.B. Prinz, “Geometric Scale Effect of Flow Channels on Performance of Fuel Cells”, Journal of the Electrochemical Society, 151 (11), A1856, (2004)
  • S.W. Cha, R. O’Hayre, F.B. Prinz, “The Influence of Size Scale on the Performance of Fuel Cells”, Solid State Ionics, 175, 789, (2004)
  • R. O’Hayre, D. Braithwaite, W. Herman, S.J. Lee, T. Fabian, S.W. Cha, Y. Saito, F.B. Prinz “Development of Portable Fuel Cell Arrays with Printed-circuit Technology”, Journal of Power Sources, 124, 459, (2003)
  • R. O’Hayre, T. Fabian, S.J. Lee, F.B. Prinz, “Lateral Ionic Conduction in Planar Array Fuel Cells”, Journal of the Electrochemical Society, 150, A430, (2003).
  • R. O’Hayre, S.J. Lee, S.W. Cha, F.B. Prinz, “A Sharp Peak in the Performance of Sputtered Platinum Fuel Cells at Ultra-Low Platinum Loading”, Journal of Power Sources, 109, 483 (2002).
  • S.J. Lee, A. Chang-Chien, S.W. Cha, R. O’Hayre, Y.I. Park, Y. Saito, F.B. Prinz “Design and Fabrication of a Micro Fuel Cell Array with ‘Flip-Flop’ Interconnection”, Journal of Power Sources, 111, 410 (2002).
  • S. W. Cha, R. O’Hayre, F. B. Prinz, “AC Impedance Investigation of Transport Phenomena in Micro Flow Channels in Fuel Cells”, Proceedings of 2nd International Conference on Fuel Cell Science Engineering and Technology, American Society of Mechanical Engineers, Rochester, NY, Jun, 2004.
  • S. W. Cha, R. O’Hayre, F. B. Prinz, “Scaling Effect in Micro Fuel Cell”, Invited keynote paper in “Materials for Energy Conversion and the Environment”, 14th International Conference on Solid State Ionics, Monterey, CA, June, 2003.
  • S. J. Lee, S. W. Cha, Y. C. Liu, R. O’Hayre, F. B. Prinz , “High Power-Density Polymer-Electrolyte Fuel Cells by Microfabrication.” In: Micro Power Sources, K. Zaghib and S. Surampudi (eds.), Proceedings Volume 2000-3, The Electrochemical Society Proceeding Series, Pennington, NJ, 2000.
  • S. J. Lee, S. W. Cha, R. O’Hayre, A. Chang-Chien, F. B. Prinz , “Miniature Fuel Cells with Non-Planar Interface by Microfabrication.” In: Power Sources for the New Millenium, M. Jain, M. A. Ryan, S. Surampudi, R. A. Marsh, and G. Nagarajan (eds.), Proceedings Volume 2000-22, The Electrochemical Society Proceeding Series, Pennington, NJ
Articles
  • “Compact fuel cells may oust feeble batteries”, New Scientist Magazine, March 6 2004, p.23.
  • “Gotta Look Sharp: Atomic force microscopy makes electrical measurements”, review by Monya Baker, MIT Technology Review, January, 2005
  • “AFM Impedance Imaging”, Applications Note, Molecular Imaging, Inc. 2004

Research Interests

  • Alternative energy conversion technologies: fuel cells, solar cells, thermoelectrics, wind power
  • Micro and nano-scale electrochemical characterization
  • Scanning probe microscopy
  • Impedance spectroscopy
  • Solid ion conductors