Self-Supported Nanoporous Cobalt Phosphide Nanowire Arrays: An Efficient 3D Hydrogen-Evolving Cathode over the Wide Range of pH 0–14

作者：Jingqi Tian, Qian Liu, Abdullah M. Asiri, Xuping Sun · 发表于：Journal of the American Chemical Society · 年份：2014 · DOI：10.1021/ja503372r · 被引用次数：2376 · 研究领域：Electrocatalysts for Energy Conversion、Ammonia Synthesis and Nitrogen Reduction、Advancements in Battery Materials

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(-1), and it maintains its catalytic activity for at least 80,00 s in acidic media. It needs overpotentials (η) of 67, 100, and 204 mV to attain current densities of 10, 20, and 100 mA cm(-2), respectively. Additionally, this electrode offers excellent catalytic performance and durability under neutral and basic conditions.