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Issue 28, 2017
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Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting

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Abstract

Herein, Ni/NiO nanoparticles were anchored on phosphorous oxide/graphene for electrocatalytic water splitting. The organophosphate units in graphene nanosheets may facilitate the preferred formation of a surface oxide-modified nickel species with stable reduced electron density at the Fermi level. Efficient catalytic activity and stability in a hydrogen evolution reaction (HER) were obtained. Ni/NiO@HGPxOy with a low nickel loading shows an overpotential of 205 mV at a current density of 10 mA cm−2 and a Tafel slope of 80 mV dec−1, whereas those of its undoped counterpart are 278 mV and 117 mV dec−1, respectively. We proposed that the small particle size, uniform dispersion of Ni/NiO nanoparticles, and electronic effect arising from the interactions between HGPxOy and Ni/NiO nanohybrids contribute to the improved electrocatalytic performance.

Graphical abstract: Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting

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Publication details

The article was received on 27 Apr 2017, accepted on 20 Jun 2017 and first published on 20 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA03628K
Citation: J. Mater. Chem. A, 2017,5, 14758-14762
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    Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting

    J. Wang, Y. Xie, Y. Yao, X. Huang, M. Willinger and L. Shao, J. Mater. Chem. A, 2017, 5, 14758
    DOI: 10.1039/C7TA03628K

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