Dr. Ryan O'Hayre

Ryan O'Hayre

Professor, Metallurgical and Materials Engineering
303-273-3952
rohayre@mines.edu

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, to present
  • Associate Professor, 2010 to
  • 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


Honors and Awards

  • 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 Chapters

  • *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

  • * 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”, submitted, Advanced Functional Materials.
  • *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”, submitted, Journal of Physical Chemistry C.
  • *T. Holme, Y. Zhou, R. Pasquarelli, R. O’Hayre, “First principles study of doped carbon supports for enhanced platinum catalysts”, submitted, Phys. Chem. Chem. Phys.
  • *A. Dhanda, R. O'Hayre, and H. Pitsch, “Oxygen Reduction Reaction on Pt(111)/Nafion and Pt(100)/Nafion Interfaces in Single Crystal PEM Fuel Cells”, submitted, Journal of Electrochemical Society.
  • *A. N. Cavendor, R. P. O’Hayre, P. A. Parilla, J. D. Perkins, and D. S. Ginley, “Persistent thermally-activated conductivity increases in amorphous In-Zn-O transparent semiconductors”, submitted, Phys. Rev. B.
  • *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”, submitted, Journal of Electrochemical Society.
  • *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”, accepted, Journal of Materials Chemistry.
  • *B. Babcock, A.J. Tupper, D. Clark, T. Fabian, R. O’Hayre, “Optimization of Air Breathing Fuel Cell Cathodes” in-press, Journal of Fuel Cell Technology
  • *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

Advanced Energy Materials Laboratory