期刊
CHEMICAL SCIENCE
卷 8, 期 8, 页码 5728-5734出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc01615h
关键词
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资金
- National Natural Science Foundation of China [21373208, 21688102, 91545204, 21621063]
- Ministry of Science and Technology of China [2016YFA0200200, 2013CB834603, 2013CB933100]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020200]
The development of low-cost and high-performance electrocatalysts remains a challenge for the hydrogen oxidation reaction (HOR) in alkaline membrane fuel cells. Here, we have reported novel Ni@h-BN core-shell nanocatalysts consisting of nickel nanoparticles encapsulated in few-layer h-BN shells. The Ni@hBN catalysts exhibit an improved HOR performance compared with the bare Ni nanoparticles. In situ characterization experiments and density functional theory calculations indicate that the interactions of the O, H, and OH species with the Ni surface under the h-BN shell are weakened, which helps to maintain the active metallic Ni phase both in air and in the electrolyte and strengthen the HOR processes occurring at the h-BN/ Ni interfaces. These results suggest a new route for designing high-performance non-noble metal electrocatalysts with encapsulating two-dimensional material overlayers for HOR reactions.
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