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Issue 14, 2018
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Boosting hydrogen evolution via optimized hydrogen adsorption at the interface of CoP3 and Ni2P

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Abstract

Transition metal phosphides (TMPs) have emerged as highly active catalysts for the hydrogen evolution reaction (HER). Herein, we report a novel excellent CoP3/Ni2P catalyst for the HER with a small onset potential of 51 mV vs. RHE, a low Tafel slope of 49 mV dec−1, a small over-potential value of 115 mV at 10 mA cm−2, and outstanding long-term stability. The normalized polarization curve also shows that CoP3/Ni2P has the best intrinsic catalytic activity compared to pure CoP3 and pure Ni2P. Density functional theory (DFT) calculations reveal that the remarkably enhanced catalytic activity is due to the interface effect of CoP3/Ni2P. The strong interactions at the interface can optimize the electronic environment around the active sites, leading to suitable H+ adsorption and H2 formation kinetics and energetics, thereby enhancing the catalytic activity.

Graphical abstract: Boosting hydrogen evolution via optimized hydrogen adsorption at the interface of CoP3 and Ni2P

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Publication details

The article was received on 13 Dec 2017, accepted on 23 Feb 2018 and first published on 14 Mar 2018


Article type: Communication
DOI: 10.1039/C7TA10902D
Citation: J. Mater. Chem. A, 2018,6, 5560-5565
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    Boosting hydrogen evolution via optimized hydrogen adsorption at the interface of CoP3 and Ni2P

    K. Wang, X. She, S. Chen, H. Liu, D. Li, Y. Wang, H. Zhang, D. Yang and X. Yao, J. Mater. Chem. A, 2018, 6, 5560
    DOI: 10.1039/C7TA10902D

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