O'Hayre, Ryan - Colorado School of Mines - Metallurgical and Materials Engineering

个人简介

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

研究领域

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

近期论文

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* 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 Gr?tzel, “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