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Issue 47, 2018
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Chainmail catalyst of ultrathin P-doped carbon shell-encapsulated nickel phosphides on graphene towards robust and efficient hydrogen generation

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Abstract

Transitional metal phosphides are potential candidates for replacing benchmark noble metal catalysts, but they suffer from electrochemical leaching/corrosion during hydrogen evolution. Herein, we report a core–shell structured chainmail catalyst composed of Ni2P nanoparticles wrapped by ultrathin phosphorous-doped carbon shells on the graphene network. Benefiting from the unique architecture, this hybrid catalyst needed overpotentials of only 110 mV and 150 mV to reach 10 mA cm−2 hydrogen evolution current density in 0.5 M H2SO4 and 1.0 M KOH for more than 24 h, respectively. Theoretical analysis revealed that the strong electronic interactions between ultrathin carbon shell and inner Ni2P core, phosphorus dopant and neighboring carbon in the shell were responsible for the enhanced electrochemical activity. This study offers not only an effective method to prepare the efficient chainmail catalysts, but also valuable insights for future design of core–shell structures through electronic modulation to enhance the activity and stability of such catalysts.

Graphical abstract: Chainmail catalyst of ultrathin P-doped carbon shell-encapsulated nickel phosphides on graphene towards robust and efficient hydrogen generation

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Publication details

The article was received on 05 Oct 2018, accepted on 11 Nov 2018 and first published on 12 Nov 2018


Article type: Communication
DOI: 10.1039/C8TA09629E
Citation: J. Mater. Chem. A, 2018,6, 24107-24113
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    Chainmail catalyst of ultrathin P-doped carbon shell-encapsulated nickel phosphides on graphene towards robust and efficient hydrogen generation

    M. Miao, R. Hou, Z. Liang, R. Qi, T. He, Y. Yan, K. Qi, H. Liu, G. Feng and B. Y. Xia, J. Mater. Chem. A, 2018, 6, 24107
    DOI: 10.1039/C8TA09629E

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