David A Cullen Senior R&D Staff Contact 865.576.0230 | CULLENDA@ORNL.GOV All Publications Standardized protocols for evaluating platinum group metal-free oxygen reduction reaction electrocatalysts in polymer electrolyte fuel cells Forum on Materials and Interfaces for Energy Storage and Conversion Efficient conversion of low-concentration nitrate sources into ammonia on a Ru-dispersed Cu nanowire electrocatalyst Elucidating the Roles of Amorphous Alumina Overcoat in Palladium-Catalyzed Selective Hydrogenation Chemical preintercalation synthesis approach for the formation of new layered tungsten oxides Recovering carbon losses in CO2 electrolysis using a solid electrolyte reactor Recreating Fuel Cell Catalyst Degradation in Aqueous Environments for Identical-Location Scanning Transmission Electron Microscopy Studies Tuning Catalyst Activation and Utilization Via Controlled Electrode Patterning for Low-Loading and High-Efficiency Water Electrolyzers Mesoporous textured Fe-N-C electrocatalysts as highly efficient cathodes for proton exchange membrane fuel cells Exploring the Impacts of Conditioning on Proton Exchange Membrane Electrolyzers by In Situ Visualization and Electrochemistry Characterization Pt Particle Size Affects Both the Charge Separation and Water Reduction Efficiencies of CdS–Pt Nanorod Photocatalysts for Light Driven H2 Generation Covalent Organic Framework (COF) Derived Ni-N-C Catalysts for Electrochemical CO2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites Insights into the rapid two-phase transport dynamics in different structured porous transport layers of water electrolyzers through high-speed visualization Nanocolumnar Pt:Ni Alloy Thin Films by High Pressure Sputtering for Oxygen Reduction Reaction... W-induced morphological modification of NiFe layered double hydroxides as efficient electrocatalysts for overall water splitting Slow Auger Recombination of Trapped Excitons Enables Efficient Multiple Electron Transfer in CdS–Pt Nanorod Heterostructure... Engineered Thin Diffusion Layers for Anion-Exchange Membrane Electrolyzer Cells with Outstanding Performance Construction of Inverse Metal–Zeolite Interfaces via Area-Selective Atomic Layer Deposition Effects of Ink Formulation on the Structure and Performance of PGM-Free Catalyst Layer in PEMFCs Bridging Thermal Catalysis and Electrocatalysis: Catalyzing CO2 Conversion with Carbon-Based Materials Quantifying the projected unit cell size variation of off-axis PtCo catalyst nanoparticles through 4D-STEM... Automated methods for improved characterization of alloy nanoparticle catalysts... Atomic-scale Imaging of PGM-free Catalyst Active Sites by 30 keV 4D-STEM General synthesis of single-atom catalysts with high metal loading using graphene quantum dots Chemical vapour deposition of Fe–N–C oxygen reduction catalysts with full utilization of dense Fe–N4 sites Pagination First page « First Previous page ‹â¶Ä¹ … Page 3 Current page 4 Page 5 … Next page ›â¶Äº Last page Last » Key Links Curriculum Vitae Organizations Physical Sciences Directorate User Facilities Center for Nanophase Materials Sciences Nanomaterials Characterization Section electron Microscopy and Microanalysis Group
