Pd/CeO2 Interface with Abundant Oxygen Vacancies for Alkaline Hydrogen Evolution/Oxidation Reaction
Source abstract
Abstract
Hydrogen evolution reaction and hydrogen oxidation reaction (HER/HOR) are two key reactions in the electrolysis of water to produce green hydrogen and fuel cells, respectively. However, the slow kinetics of HER/HOR under alkaline conditions and lack of catalysts with good activity and durability limit their development and application. Here, Pd nanoparticles supported by CeO 2 /C with abundant oxygen vacancies were synthesized for alkaline HER/HOR. The results of physical characterizations and electrochemical measurements indicated that small-size Pd nanoparticles were in full contact with CeO 2, and charge transfer occurred at the Pd–CeO 2 interface. The rich Pd–CeO 2 interface and the interaction between metal and metal oxide carriers greatly improved the electrocatalytic activity of HER and HOR under alkaline conditions. The optimal Pd/CeO 2 /C exhibited excellent HER/HOR activity with a higher HER exchange current density (1.963 mA cm –2 ) than commercial Pt/C. Furthermore, the HER and HOR mass activity of Pd/CeO 2 /C reached 33 times and 9.2 times that of Pd/C, respectively. Pd/CeO 2 /C exhibited enhanced electrocatalytic stability due to the anchoring of Pd via abundant oxygen vacancy defects in CeO 2 /C. This work provides a meaningful reference for the rational regulation of metal–support interfaces and the application of metal-oxide–support-based electrocatalysts in electrocatalytic reactions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Fuel Cells and Related Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, PR China
Zhejiang Province key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310027, PR China
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China
Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo 315200, PR China
Shanghai Research Institute of Petrochemical Technology, Sinopec, Shanghai 201208, PR China
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China
Funding
China Southern Power Grid · National Natural Science Foundation of China
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