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Facile synthesis, characterization and DFT studies of a nanostructured nickel–molybdenum–phosphorous planar electrode as an active electrocatalyst for the hydrogen evolution reaction

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Abstract

In this paper, we combined experimental and theoretical routes to develop a novel nanostructured nickel–molybdenum–phosphorous planar electrode as an efficient catalyst toward the hydrogen evolution reaction (HER). The HER activities of various Ni-based electrodes (Ni4Mo and Ni12P5) were evaluated not only experimentally but also by density functional theory. Meanwhile, the electrocatalytic performance of Ni–Mo–P prepared at different temperatures (500 °C, 600 °C, 700 °C, and 800 °C) was also explored. The results indicated that the sample prepared at 700 °C exhibited the best catalytic activity. The as-fabricated Ni–Mo–P electrode possessed lower overpotential, higher current density and a smaller Tafel slope than pristine modified Ni@Ni–Mo in 1.0 M KOH and also showed long-term stability. An overpotential as low as 276 mV could be achieved at 100 mA cm−2 H2 evolving current density, which was superior to those of most previously reported samples. After phosphorization treatment, the as-formed Ni12P5 played a crucial role in the activity enhancement. Density functional theory calculations revealed that Ni12P5 has a smaller |ΔGH*| value than Ni4Mo, further confirming that Ni12P5 shows better catalytic performance than Ni4Mo.

Graphical abstract: Facile synthesis, characterization and DFT studies of a nanostructured nickel–molybdenum–phosphorous planar electrode as an active electrocatalyst for the hydrogen evolution reaction

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Publication details

The article was received on 03 Oct 2018, accepted on 09 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C8NR08039A
Citation: Nanoscale, 2019, Advance Article

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    Facile synthesis, characterization and DFT studies of a nanostructured nickel–molybdenum–phosphorous planar electrode as an active electrocatalyst for the hydrogen evolution reaction

    W. Zhang, J. Zheng, X. Gu, B. Tang, J. Li and X. Wang, Nanoscale, 2019, Advance Article , DOI: 10.1039/C8NR08039A

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