David A Cullen Senior R&D Staff Contact CULLENDA@ORNL.GOV All Publications Synthesis of novel phases in Si nanowires using diamond anvil cells at high pressures and temperatures... Tailoring the Radionuclide Encapsulation and Surface Chemistry of La(223Ra)VO4 Nanoparticles for Targeted Alpha Therapy... On the enhanced sulfur and coking tolerance of Ni-Co-rare earth oxide catalysts for the dry reforming of methane Performance enhancement and degradation mechanism identification of a single-atom Co–N–C catalyst for proton exchange membrane fuel cells Single-Iron Site Catalysts with Self-Assembled Dual-size Architecture and Hierarchical Porosity for Proton-Exchange Membrane Fuel Cells Durability evaluation of a Fe–N–C catalyst in polymer electrolyte fuel cell environment via accelerated stress tests Multi-Scale Characterization and Simulation of Impact Welding Between Immiscible Mg/Steel Alloys Electron tomography of unirradiated and irradiated nuclear graphite Chemical Vapor Deposition for Atomically Dispersed and Nitrogen Coordinated Single Metal Site Catalysts... The Impact of Ink and Spray Variables on Catalyst Layer Properties, Electrolyzer Performance, and Electrolyzer Durability Single Cobalt Sites Dispersed in Hierarchically Porous Nanofiber Networks for Durable and High‐Power PGM‐Free Cathodes in Fuel Cells Methanol tolerance of atomically dispersed single metal site catalysts: mechanistic understanding and high-performance direct methanol fuel cells Direct Characterization of Atomically Dispersed Catalysts: Nitrogen‐Coordinated Ni Sites in Carbon‐Based Materials for CO2 Electroreduction Impact of Carbon Support Structure on the Durability of PtCo Electrocatalysts Styrene-Based Elastomer Composites with Functionalized Graphene Oxide and Silica Nanofiber Fillers: Mechanical and Thermal Conductivity Properties P-block single-metal-site tin/nitrogen-doped carbon fuel cell cathode catalyst for oxygen reduction reaction Atomic-Scale Structural Mapping of Active Sites in Monolayer PGM-Free Catalysts by Low-Voltage 4D-STEM Hybrid hollow silica particles: synthesis and comparison of properties with pristine particles Efficient Hot Electron Transfer from Small Au Nanoparticles Exchange of Ions across the TiN/TaO x Interface during Electroformation of TaO x -Based Resistive Switching Devices Improving Electronic Conductivity of Layered Oxides through the Formation of Two-Dimensional Heterointerface for Intercalation Batteries Enhancing Ce x Zr 1 – x O 2 Activity for Methane Dry Reforming Using Subsurface Ni Dopants Building Electron/Proton Nanohighways for Full Utilization of Water Splitting Catalysts... Heat‐Treated Aerogel as a Catalyst for the Oxygen Reduction Reaction... Plasma Synthesis of Spherical Crystalline and Amorphous Electrolyte Nanopowders for Solid-State Batteries Pagination First page « First Previous page ‹Ĺ … Page 5 Current page 6 Page 7 … Next page ›ĺ 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
