All Stories

  1. Proton-conducting oxides for energy conversion and storage

    Article • Applied Physics Reviews, March 2020, American Institute of Physics

    Ryan O'Hayre

  2. Effect of Cu doping on the electrochemical properties and structural phases of La0.8Sr0.2Mn1−xCuxO3 (0≤x≤0.2) at elevated temperature

    Article • Solid State Ionics, July 2014, Elsevier

    Ryan O'Hayre

  3. Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells

    Article • Solid State Ionics, July 2014, Elsevier

    Ryan O'Hayre

  4. Non-equilibrium deposition of phase pure Cu2O thin films at reduced growth temperature

    Article • APL Materials, February 2014, American Institute of Physics

    Ryan O'Hayre

  5. Effect of nitrogen post-doping on a commercial platinum–ruthenium/carbon anode catalyst

    Article • Journal of Power Sources, February 2014, Elsevier

    Ryan O'Hayre

  6. Enhanced Electron Mobility Due to Dopant‐Defect Pairing in Conductive ZnMgO

    Article • Advanced Functional Materials, January 2014, Wiley

    Ryan O'Hayre

  7. Recent progress on nitrogen/carbon structures designed for use in energy and sustainability applications

    Article • Energy & Environmental Science, January 2014, Royal Society of Chemistry

    Ryan O'Hayre

  8. Anomalous low-temperature proton conductivity enhancement in a novel protonic nanocomposite

    Article • Physical Chemistry Chemical Physics, January 2014, Royal Society of Chemistry

    Ryan O'Hayre

  9. Processing-phase diagrams: a new tool for solution-deposited thin-film development applied to the In5O(OPri)13–In2O3 system

    Article • Journal of Materials Chemistry C, January 2014, Royal Society of Chemistry

    Ryan O'Hayre

  10. Oxide enthalpy of formation and band gap energy as accurate descriptors of oxygen vacancy formation energetics

    Article • Energy & Environmental Science, January 2014, Royal Society of Chemistry

    Ryan O'Hayre, Charles Musgrave

  11. Improvement in direct methanol fuel cell performance by treating the anode at high anodic potential

    Article • Journal of Power Sources, January 2014, Elsevier

    Ryan O'Hayre

  12. Solid-state reactive sintering mechanism for proton conducting ceramics

    Article • Solid State Ionics, December 2013, Elsevier

    Ryan O'Hayre

  13. Model-based characterization of charged-defect transport and apparent gas-phase permeation in mixed-conducting perovskite membranes

    Article • Solid State Ionics, November 2013, Elsevier

    Ryan O'Hayre

  14. Electrocatalytic oxidation of methanol on Pt catalyst supported on nitrogen-doped graphene induced by hydrazine reduction

    Article • Journal of Physics and Chemistry of Solids, November 2013, Elsevier

    Ryan O'Hayre

  15. Plasmonic Ag nanostructures on thin substrates for enhanced energy harvesting

    Article • September 2013, SPIE

    Ryan O'Hayre, Dr. Steven Kooi

  16. Electromechanical tuning of nanoscale MIM diodes by nanoindentation

    Article • Journal of Materials Research, June 2013, Springer Science + Business Media

    Ryan O'Hayre

  17. Synthesis by spark plasma sintering of a novel protonic/electronic conductor composite: BaCe0.2Zr0.7Y0.1O3−δ /Sr0.95Ti0.9Nb0.1O3−δ (BCZY27/STN95)

    Article • Journal of Materials Science, May 2013, Springer Science + Business Media

    Ryan O'Hayre

  18. NANOSCALE ELECTROCHEMISTRY IN ENERGY RELATED SYSTEMS USING ATOMIC FORCE MICROSCOPY

    Article • March 2013, World Scientific Pub Co Pte Lt

    Ryan O'Hayre

  19. Enhanced Fuel Cell Catalyst Durability with Nitrogen Modified Carbon Supports

    Article • Journal of The Electrochemical Society, February 2013, The Electrochemical Society

    Ryan O'Hayre

  20. A novel wet-chemistry method for the synthesis of multicomponent nanoparticles: A case study of BaCe0.7Zr0.1Y0.1Yb0.1O3−δ

    Article • Materials Letters, February 2013, Elsevier

    Ryan O'Hayre

  21. The use of nitrogen-doped graphene supporting Pt nanoparticles as a catalyst for methanol electrocatalytic oxidation

    Article • Carbon, February 2013, Elsevier

    Ryan O'Hayre

  22. Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts

    Article • Applied Surface Science, February 2013, Elsevier

    Ryan O'Hayre

  23. Modeling the Steady-State and Transient Response of Polarized and Non-Polarized Proton-Conducting Doped-Perovskite Membranes

    Article • Journal of The Electrochemical Society, January 2013, The Electrochemical Society

    Ryan O'Hayre

  24. Metal–Insulator–Metal Diodes: Role of the Insulator Layer on the Rectification Performance

    Article • Advanced Materials, January 2013, Wiley

    Ryan O'Hayre

  25. Nitrogen: unraveling the secret to stable carbon-supported Pt-alloy electrocatalysts

    Article • Energy & Environmental Science, January 2013, Royal Society of Chemistry

    Ryan O'Hayre

  26. A promising cathode for intermediate temperature protonic ceramic fuel cells: BaCo0.4Fe0.4Zr0.2O3−δ

    Article • RSC Advances, January 2013, Royal Society of Chemistry

    Ryan O'Hayre

  27. Point-Contact Metal-Insulator-Metal Architecture: A Facile Approach for Material Screening Studies and Beyond

    Article • January 2013, Springer Science + Business Media

    Ryan O'Hayre

  28. The design and realization of a large-area flexible nanofiber-based mat for pollutant degradation: an application in photocatalysis

    Article • Nanoscale, January 2013, Royal Society of Chemistry

    Ryan O'Hayre

  29. Computational investigation of defect segregation at the (001) surface of BaCeO3 and BaZrO3: the role of metal–oxygen bond strength in controlling vacancy segregation

    Article • Journal of Materials Chemistry A, January 2013, Royal Society of Chemistry

    Ryan O'Hayre

  30. Sr- and Mn-doped LaAlO3−δ for solar thermochemical H2 and CO production

    Article • Energy & Environmental Science, January 2013, Royal Society of Chemistry

    Ryan O'Hayre

  31. Planar metal–insulator–metal diodes based on the Nb/Nb2O5/X material system

    Article • Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena, January 2013, American Vacuum Society

    Ryan O'Hayre, Professor Prakash K. Dubey

  32. Facile single-step preparation of Pt/N-graphene catalysts with improved methanol electrooxidation activity

    Article • Journal of Solid State Electrochemistry, December 2012, Springer Science + Business Media

    Ryan O'Hayre

  33. Porous nanocrystalline TiO2 with high lithium-ion insertion performance

    Article • Journal of Materials Science, December 2012, Springer Science + Business Media

    Ryan O'Hayre

  34. Effect of Halide-Modified Model Carbon Supports on Catalyst Stability

    Article • ACS Applied Materials & Interfaces, December 2012, American Chemical Society (ACS)

    Ryan O'Hayre

  35. Conduction electron resonance used to determine size of palladium nanoparticles in proton conducting ceramics

    Article • Journal of Magnetic Resonance, December 2012, Elsevier

    Ryan O'Hayre

  36. Poisson–Boltzmann model of space charge layer effects on conductivity in randomly distributed nanoionic composites

    Article • Electrochimica Acta, November 2012, Elsevier

    Ryan O'Hayre

  37. Effect of a nitrogen-doped PtRu/carbon anode catalyst on the durability of a direct methanol fuel cell

    Article • Journal of Power Sources, November 2012, Elsevier

    Ryan O'Hayre

  38. Enhanced Stability of PtRu Supported on N-Doped Carbon for the Anode of a DMFC

    Article • Journal of The Electrochemical Society, September 2012, The Electrochemical Society

    Ryan O'Hayre

  39. In situ small-angle x-ray scattering analysis of improved catalyst—support interactions through nitrogen modification

    Article • MRS Communications, September 2012, Springer Science + Business Media

    Ryan O'Hayre

  40. Nanoscale impedance and complex properties in energy-related systems

    Article • MRS Bulletin, July 2012, Springer Science + Business Media

    Ryan O'Hayre

  41. Progress toward a solid-state ionic field effect transistor

    Article • Journal of Applied Physics, April 2012, American Institute of Physics

    Ryan O'Hayre

  42. Electrical conductivities of nano ionic composite based on yttrium-doped barium zirconate and palladium metal

    Article • Solid State Ionics, March 2012, Elsevier

    Ryan O'Hayre

  43. The origin of electrical property deterioration with increasing Mg concentration in ZnMgO:Ga

    Article • Thin Solid Films, February 2012, Elsevier

    Ryan O'Hayre

  44. ChemInform Abstract: Solution Processing of Transparent Conductors: From Flask to Film

    Article • ChemInform, December 2011, Wiley

    Ryan O'Hayre

  45. A theoretical study of the influence of dopant concentration on the hydration properties of yttrium-doped barium cerate

    Article • Solid State Ionics, December 2011, Elsevier

    Ryan O'Hayre

  46. Modeling space charge layer interaction and conductivity enhancement in nanoionic composites

    Article • Electrochimica Acta, October 2011, Elsevier

    Ryan O'Hayre

  47. Diode-coupled Ag nanoantennas for nanorectenna energy conversion

    Article • September 2011, SPIE

    Ryan O'Hayre

  48. Pt–Ru Alloyed Fuel Cell Catalysts Sputtered from a Single Alloyed Target

    Article • ACS Catalysis, August 2011, American Chemical Society (ACS)

    Ryan O'Hayre

  49. Coupled transport and uphill permeation of steam and oxygen in a dense ceramic membrane

    Article • Journal of Membrane Science, July 2011, Elsevier

    Ryan O'Hayre

  50. A novel way to characterize Metal-Insulator-Metal devices via nanoindentation

    Article • June 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  51. Fabrication and Characterization of MIM Diodes Based on Nb/Nb2O5 Via a Rapid Screening Technique

    Article • Advanced Materials, May 2011, Wiley

    Ryan O'Hayre

  52. Tuning Carbon-Based Fuel Cell Catalyst Support Structures via Nitrogen Functionalization. II. Investigation of Durability of Pt–Ru Nanoparticles Supported on Highly Oriented Pyrolytic Graphite Model Catalyst Supports As a Function of Nitrogen Implantat...

    Article • The Journal of Physical Chemistry C, May 2011, American Chemical Society (ACS)

    Ryan O'Hayre

  53. Tuning Carbon-Based Fuel Cell Catalyst Support Structures via Nitrogen Functionalization. I. Investigation of Structural and Compositional Modification of Highly Oriented Pyrolytic Graphite Model Catalyst Supports as a Function of Nitrogen Implantation...

    Article • The Journal of Physical Chemistry C, May 2011, American Chemical Society (ACS)

    Ryan O'Hayre

  54. Sintering Studies on 20 mol% Yttrium-Doped Barium Cerate

    Article • Journal of the American Ceramic Society, February 2011, Wiley

    Ryan O'Hayre

  55. Facile Synthesis of Nanocrystalline TiO2 Mesoporous Microspheres for Lithium-Ion Batteries

    Article • The Journal of Physical Chemistry C, January 2011, American Chemical Society (ACS)

    Ryan O'Hayre

  56. Preparation and Synthesis of Mixed Ionic and Electronic Conducting Ceramic Membranes for Oxygen Permeation

    Article • January 2011, Wiley

    Ryan O'Hayre

  57. Solution processing of transparent conductors: from flask to film

    Article • Chemical Society Reviews, January 2011, Royal Society of Chemistry

    Ryan O'Hayre

  58. Diffusion Impedance Element Model for the Triple Phase Boundary

    Article • Journal of The Electrochemical Society, January 2011, The Electrochemical Society

    Ryan O'Hayre

  59. ChemInform Abstract: A Porous LiFePO4 and Carbon Nanotube Composite.

    Article • ChemInform, December 2010, Wiley

    Ryan O'Hayre

  60. What a productive year!

    Article • MRS Bulletin, December 2010, Springer Science + Business Media

    Ryan O'Hayre

  61. Proton-conducting yttrium-doped barium cerate ceramics synthesized by a cost-effective solid-state reactive sintering method

    Article • Solid State Ionics, October 2010, Elsevier

    Ryan O'Hayre

  62. Metal-insulator-metal point-contact diodes as a rectifier for rectenna

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  63. Solution deposition of amorphous IZO films by ultrasonic spray

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  64. Active water management at the cathode of a planar air-breathing polymer electrolyte membrane fuel cell using an electroosmotic pump

    Article • Journal of Power Sources, June 2010, Elsevier

    Ryan O'Hayre, Dr Shawn E Litster

  65. Solution Synthesis and Characterization of Indium−Zinc Formate Precursors for Transparent Conducting Oxides

    Article • Inorganic Chemistry, May 2010, American Chemical Society (ACS)

    Ryan O'Hayre

  66. Passive water management at the cathode of a planar air-breathing proton exchange membrane fuel cell

    Article • Journal of Power Sources, May 2010, Elsevier

    Ryan O'Hayre, Dr Shawn E Litster

  67. Cost-effective solid-state reactive sintering method for high conductivity proton conducting yttrium-doped barium zirconium ceramics

    Article • Solid State Ionics, April 2010, Elsevier

    Ryan O'Hayre

  68. First principles study of doped carbon supports for enhanced platinum catalysts

    Article • Physical Chemistry Chemical Physics, January 2010, Royal Society of Chemistry

    Ryan O'Hayre

  69. Enhancement of Pt and Pt-alloy fuel cell catalyst activity and durability via nitrogen-modified carbon supports

    Article • Energy & Environmental Science, January 2010, Royal Society of Chemistry

    Ryan O'Hayre

  70. A porous LiFePO4 and carbon nanotube composite

    Article • Chemical Communications, January 2010, Royal Society of Chemistry

    Ryan O'Hayre

  71. Optimization of Passive Air Breathing Fuel Cell Cathodes

    Article • Journal of Fuel Cell Science and Technology, January 2010, ASME International

    Ryan O'Hayre

  72. The Role of Nitrogen Doping on Durability in the Pt-Ru/HOPG System

    Article • January 2010, The Electrochemical Society

    Ryan O'Hayre

  73. Solid-state reactive sintering mechanism for large-grained yttrium-doped barium zirconate proton conducting ceramics

    Article • Journal of Materials Chemistry, January 2010, Royal Society of Chemistry

    Ryan O'Hayre

  74. Development of a multi-species transport space theory and its application to permeation behavior in proton-conducting doped perovskites

    Article • Journal of Materials Chemistry, January 2010, Royal Society of Chemistry

    Ryan O'Hayre

  75. Dopant-Induced Electronic Structure Modification of HOPG Surfaces: Implications for High Activity Fuel Cell Catalysts

    Article • The Journal of Physical Chemistry C, November 2009, American Chemical Society (ACS)

    Ryan O'Hayre

  76. Solution deposition of amorphous IZO films by ultrasonic spray pyrolysis

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  77. Atmospheric pressure synthesis of In2Se3, Cu2Se, and CuInSe2 without external selenization from solution precursors

    Article • Journal of Materials Research, April 2009, Springer Science + Business Media

    Ryan O'Hayre

  78. EIS Analysis of the Triple Phase Boundary Model

    Article • January 2009, The Electrochemical Society

    Ryan O'Hayre

  79. Triple Phase Boundaries in Solid-Oxide Cathodes

    Article • SIAM Journal on Applied Mathematics, January 2009, Society for Industrial & Applied Mathematics (SIAM)

    Ryan O'Hayre

  80. Improving PEM fuel cell catalyst activity and durability using nitrogen-doped carbon supports: observations from model Pt/HOPG systems

    Article • Journal of Materials Chemistry, January 2009, Royal Society of Chemistry

    Ryan O'Hayre

  81. Optimization of conductivity and transparency in amorphous In-ZN-O transparent conductors

    Article • May 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  82. General mobility and carrier concentration relationship in transparent amorphous indium zinc oxide films

    Article • Physical Review B, March 2008, American Physical Society (APS)

    Ryan O'Hayre

  83. Transparent conducting oxide development for electronics applications

    Article • February 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Ryan O'Hayre

  84. ORR Adsorbate Dynamics on Pt Single Crystal PEM Fuel Cells

    Article • January 2008, The Electrochemical Society

    Ryan O'Hayre

  85. Enhancement of Pt-Based Catalysts via N-Doped Carbon Supports

    Article • January 2008, ASME International

    Ryan O'Hayre

  86. Optimization of Passive Air Breathing Fuel Cell Cathodes

    Article • January 2008, ASME International

    Ryan O'Hayre

  87. Modeling of Material Parameters for Increased Steam-Permeation in Yttrium-Doped Barium Cerate Ceramic Membranes

    Article • January 2008, ASME International

    Ryan O'Hayre

  88. Improving PEM Fuel Cell Catalysts Using Nitrogen-Doped Carbon Supports

    Article • January 2008, ASME International

    Ryan O'Hayre

  89. Engineering model of a passive planar air breathing fuel cell cathode

    Article • Journal of Power Sources, May 2007, Elsevier

    Ryan O'Hayre, Dr Shawn E Litster

  90. Mott−Schottky and Charge-Transport Analysis of Nanoporous Titanium Dioxide Films in Air

    Article • The Journal of Physical Chemistry C, February 2007, American Chemical Society (ACS)

    Ryan O'Hayre

  91. A parametric study of TiO2/CuInS2nanocomposite solar cells: how cell thickness, buffer layer thickness, and TiO2particle size affect performance

    Article • Nanotechnology, January 2007, Institute of Physics Publishing

    Ryan O'Hayre

  92. Measurement of Temperature and Reaction Species in the Cathode Diffusion Layer of a Free-Convection Fuel Cell

    Article • Journal of The Electrochemical Society, January 2007, The Electrochemical Society

    Ryan O'Hayre

  93. Spatial and Temporal Measurements of Temperature and Reaction Species in the Cathode Diffusion Layer of a Planar Air-Breathing PEM Fuel Cell

    Article • January 2007, The Electrochemical Society

    Ryan O'Hayre

  94. Electrochemical impedance investigation of flooding in micro-flow channels for proton exchange membrane fuel cells

    Article • Journal of Power Sources, October 2006, Elsevier

    Ryan O'Hayre

  95. The role of ambient conditions on the performance of a planar, air-breathing hydrogen PEM fuel cell

    Article • Journal of Power Sources, October 2006, Elsevier

    Ryan O'Hayre

  96. The Influence of TiO2 Particle Size in TiO2/CuInS2 Nanocomposite Solar Cells

    Article • Advanced Functional Materials, June 2006, Wiley

    Ryan O'Hayre

  97. Combined Heat and Mass Transfer Model of a Passive Air Breathing Fuel Cell Cathode

    Article • January 2006, The Electrochemical Society

    Ryan O'Hayre, Dr Shawn E Litster

  98. Water Management at the Cathode of a Planar Air-Breathing Fuel Cell with an Electroosmotic Pump

    Article • January 2006, The Electrochemical Society

    Ryan O'Hayre, Dr Shawn E Litster

  99. The Triple Phase Boundary

    Article • Journal of The Electrochemical Society, January 2005, The Electrochemical Society

    Ryan O'Hayre

  100. Electrochemical nanopatterning of Ag on solid-state ionic conductor RbAg4I5 using atomic force microscopy

    Article • Applied Physics Letters, October 2004, American Institute of Physics

    Ryan O'Hayre

  101. Quantitative impedance measurement using atomic force microscopy

    Article • Journal of Applied Physics, September 2004, American Institute of Physics

    Ryan O'Hayre

  102. The scaling behavior of flow patterns: a model investigation

    Article • Journal of Power Sources, July 2004, Elsevier

    Ryan O'Hayre

  103. Ionic and electronic impedance imaging using atomic force microscopy

    Article • Journal of Applied Physics, June 2004, American Institute of Physics

    Ryan O'Hayre

  104. AC Impedance Investigation of Flooding in Micro Flow Channels for Fuel Cells

    Article • January 2004, ASME International

    Ryan O'Hayre

  105. The Air/Platinum/Nafion Triple-Phase Boundary: Characteristics, Scaling, and Implications for Fuel Cells

    Article • Journal of The Electrochemical Society, January 2004, The Electrochemical Society

    Ryan O'Hayre

  106. Geometric Scale Effect of Flow Channels on Performance of Fuel Cells

    Article • Journal of The Electrochemical Society, January 2004, The Electrochemical Society

    Ryan O'Hayre

  107. Development of portable fuel cell arrays with printed-circuit technology

    Article • Journal of Power Sources, November 2003, Elsevier

    Ryan O'Hayre

  108. Lateral Ionic Conduction in Planar Array Fuel Cells

    Article • Journal of The Electrochemical Society, January 2003, The Electrochemical Society

    Ryan O'Hayre

  109. Design and fabrication of a micro fuel cell array with “flip-flop” interconnection

    Article • Journal of Power Sources, November 2002, Elsevier

    Ryan O'Hayre

  110. A sharp peak in the performance of sputtered platinum fuel cells at ultra-low platinum loading

    Article • Journal of Power Sources, July 2002, Elsevier

    Ryan O'Hayre

  111. Frequency-Dependent Transport Imaging by Scanning Probe Microscopy

    Article • Springer Science + Business Media

    Ryan O'Hayre