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A nickel nanocatalyst within a h-BN shell for enhanced hydrogen oxidation reactions

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Abstract

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@h-BN 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.

Graphical abstract: A nickel nanocatalyst within a h-BN shell for enhanced hydrogen oxidation reactions

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Publication details

The article was received on 11 Apr 2017, accepted on 09 Jun 2017 and first published on 09 Jun 2017


Article type: Edge Article
DOI: 10.1039/C7SC01615H
Citation: Chem. Sci., 2017, Advance Article
  • Open access: Creative Commons BY-NC license
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    A nickel nanocatalyst within a h-BN shell for enhanced hydrogen oxidation reactions

    L. Gao, Y. Wang, H. Li, Q. Li, N. Ta, L. Zhuang, Q. Fu and X. Bao, Chem. Sci., 2017, Advance Article , DOI: 10.1039/C7SC01615H

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