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Issue 48, 2018
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C60-Decorated nickel–cobalt phosphide as an efficient and robust electrocatalyst for hydrogen evolution reaction

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Abstract

High-activity electrocatalysts play a crucial role in energy conversion through splitting water to produce hydrogen. Here we report the synthesis of a bimetallic phosphide of Ni–Co–P coupled with C60 molecules which acts as an electrocatalyst for the hydrogen evolution reaction (HER). Powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterization reveals that the synthesized C60-decorated Ni–Co–P nanoparticles have an average diameter of ∼4 nm with rich structural defects. Electrochemical tests show that the as-synthesized C60-decorated Ni–Co–P catalyst with a C60-content of 3.93 wt% presents a low onset overpotential of 23.8 mV, a small Tafel slope value of 48 mV dec−1, and excellent hydrogen-evolution stability with a slight increase of its η10 from 97 mV to 102 mV after 500 cycles. Additionally, electrochemical impedance spectroscopy (EIS) confirms that the C60-decorated Ni–Co–P electrode possesses faster charge-transfer kinetics and hydrogen-adsorption kinetics than the C60-free Ni–Co–P electrode during the HER process. The synthesis of a C60-decorated composite is feasible and the composite can be used as an efficient and robust Pt-free catalyst.

Graphical abstract: C60-Decorated nickel–cobalt phosphide as an efficient and robust electrocatalyst for hydrogen evolution reaction

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Publication details

The article was received on 13 Sep 2018, accepted on 11 Nov 2018 and first published on 12 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR07472K
Citation: Nanoscale, 2018,10, 23070-23079
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    C60-Decorated nickel–cobalt phosphide as an efficient and robust electrocatalyst for hydrogen evolution reaction

    Z. Du, N. Jannatun, D. Yu, J. Ren, W. Huang and X. Lu, Nanoscale, 2018, 10, 23070
    DOI: 10.1039/C8NR07472K

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