期刊
ACS MATERIALS LETTERS
卷 1, 期 1, 页码 103-110出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.9b00124
关键词
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资金
- Natural Science Foundation of Shandong Province [ZR2018JL009]
- National Natural Science Foundation of China [11621063, U1632149, U1532265]
- Key Research Program of Frontier Sciences [QYZDY-SSW-SLH011]
Electrocatalytic urea oxidation reaction (UOR) is a key half-reaction in assembling the direct urea fuel cells (DUFCs) to generate electricity, or constructing a urea electrolyzer to convert electricity to clean hydrogen energy. However, the sluggish six-electron transfer process of UOR significantly limits the reaction kinetics, thereby restricting the development of the aforementioned energy conversion techniques. Herein, we highlighted a high-performance UOR catalyst based on the hierarchical wire-on-sheet Ni(OH)(2) nanoarrays with optimal cerium doping and controllable phase regulation. The local Ni3+ species and the unique wire-on-sheet morphology of the alpha-Ni(OH)(2) nanoarray catalyst guarantee fast formation of high-valence species for UOR catalysis, and the Ce doping further optimizes the electronic structure, therefore resulting in greatly enhanced UOR behavior synergistically. This work may provide a universal structural optimization strategy for designing advanced UOR electrocatalysts.
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