Self-Supported Nanoporous Cobalt Phosphide Nanowire Arrays: An Efficient 3D Hydrogen-Evolving Cathode over the Wide Range of pH 0鈥?4

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• 作者：Jingqi Tian ; Qian Liu ; Abdullah M. Asiri ; Xuping Sun
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：May 28, 2014
• 年：2014
• 卷：136
• 期：21
• 页码：7587-7590
• 全文大小：265K
• 年卷期：v.136,no.21(May 28, 2014)
• ISSN：1520-5126

文摘

In this Communication, we report the topotactic fabrication of self-supported nanoporous cobalt phosphide nanowire arrays on carbon cloth (CoP/CC) via low-temperature phosphidation of the corresponding Co(OH)F/CC precursor. The CoP/CC, as a robust integrated 3D hydrogen-evolving cathode, shows a low onset overpotential of 38 mV and a small Tafel slope of 51 mV dec^鈥?, and it maintains its catalytic activity for at least 80鈥?00 s in acidic media. It needs overpotentials (畏) of 67, 100, and 204 mV to attain current densities of 10, 20, and 100 mA cm^鈥?, respectively. Additionally, this electrode offers excellent catalytic performance and durability under neutral and basic conditions.