Tailor Control of Neodymium Doping Sites in γ‐MnO 2 for Stable Oxygen Evolution Reaction in Acidic Electrolyte
Source abstract
Abstract
Abstract Large‐scale application of proton exchange membrane (PEM) water electrolysis for green hydrogen production is greatly limited by the cost and availability of precious metal catalysts (mainly Iridium‐based). Therefore, it is necessary to develop efficient, cost‐effective oxygen evolution reaction (OER) electrocatalysts for the replacement of Ir. In this study, the introduction of 1 mol% Neodymium (Nd) into γ‐MnO 2 is found to extend the lifetime of γ‐MnO 2 to ≈1000 h at 100 mA cm −2 in acidic electrolyte without loss of activity. The extension of catalyst lifetime is attributed to an increase in the dissolution potential of MnO 4 − by 50 mV, as indicated by in situ UV–vis spectro‐electrochemical measurements. Density functional theory (DFT) calculations suggest that Nd atoms are preferentially doped into the edge‐sharing Mn octahedral in ramsdellite phase, resulting in optimized binding energy between the catalyst and the oxygen intermediates. This work demonstrates that Nd element doping can modulate electronic structures to improve the catalytic stability of Mn‐based OER catalysts, highlighting the possibility of using earth‐abundant OER catalysts for PEM water electrolysis.
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Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Advancements in Solid Oxide Fuel Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy 457 Zhongshan Road Dalian 116023 China
Biofunctional Catalyst Research Team RIKEN Center for Sustainable Resource Science (CSRS) 2‐1 Hirosawa, Wako Saitama 351‐0198 Japan
The University of Chinese Academy of Sciences Beijing 100049 China
National and Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Collaborative Innovation Center of Nano Functional Materials and Applications of Henan Province Henan University Kaifeng 475004 China
Funding
Ministry of Science and Technology of the People's Republic of China · National Key Research and Development Program of China · National Natural Science Foundation of China · Dalian High-Level Talent Innovation Program · Innovative Research Group Project of the National Natural Science Foundation of China
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