David A Cullen Senior R&D Staff Contact CULLENDA@ORNL.GOV All Publications Design of graded cathode catalyst layers with various ionomers for fuel cell application Electrochemical characterization of evolving ionomer/electrocatalyst interactions throughout accelerated stress tests Robust Copper-Based Nanosponge Architecture Decorated by Ruthenium with Enhanced Electrocatalytic Performance for Ambient Nitrogen Reduction to Ammonia La–Sr–Co oxide catalysts for oxygen evolution reaction in anion exchange membrane water electrolyzer: The role of electrode fabrication on performance and durability Outstanding Platinum Group Metal-free Bifunctional Catalysts for Rechargeable Zinc-Air Batteries 20%-efficient polycrystalline Cd(Se,Te) thin-film solar cells with compositional gradient near the front junction Elucidating the impact of the ionomer equivalent weight on a platinum group metal-free PEMFC cathode via oxygen limiting curr... Ordered CoPt oxygen reduction catalyst with high performance and durability PdCu Electrocatalysts for Selective Nitrate and Nitrite Reduction to Nitrogen Revealing the activity and selectivity of ppm level copper in gas diffusion electrodes towards CO and CO2 electroreduction Molecular Catalyst Synthesis Strategies to Prepare Atomically Dispersed Fe-N-C Heterogeneous Catalysts MoS2 nanosheet integrated electrodes with engineered 1T-2H phases and defects for efficient hydrogen production in practical ... Mixed-Metal Nickel–Iron Oxide Aerogels for Oxygen Evolution Reaction Design of PGM-free cathodic catalyst layers for advanced PEM fuel cells A general synthesis of single atom catalysts with controllable atomic and mesoporous structures Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells Electrocatalysis of Oxygen Reduction Reaction in a Polymer Electrolyte Fuel Cell with a Covalent Framework of Iron Phthalocyanine Aerogel Unveiling mechanism of surface-guided platinum nanowire growth Tracking Degradation in Individual Catalyst Nanoparticles Under Fuel Cell-Relevant Cycling Conditions by Identical-Location STEM Tracking Nanoparticle Degradation across Fuel Cell Electrodes by Automated Analytical Electron Microscopy... Imaging Sensitive Catalyst Active Site Structure by 30 keV Electron Ptychography Improved Throughput, Statistics, and Instrument Utilization with Automated Analytical Electron Microscopy... Understanding Recoverable vs Unrecoverable Voltage Losses and Long-Term Degradation Mechanisms in Anion Exchange Membrane Fuel Cells Elucidating the Roles of Amorphous Alumina Overcoat in Palladium-Catalyzed Selective Hydrogenation Electrolyzer Performance Loss from Accelerated Stress Tests and Corresponding Changes to Catalyst Layers and Interfaces Pagination First page « First Previous page ‹‹ … Page 2 Current page 3 Page 4 … Next page ›› Last page Last » Key Links Curriculum Vitae Google Scholar ORCID Organizations Physical Sciences Directorate User Facilities Center for Nanophase Materials Sciences Nanomaterials Characterization Section electron Microscopy and Microanalysis Group
