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

Tian, Jingqi; Liu, Qian; Asiri, Abdullah M.; Sun, Xuping

doi:10.1021/ja503372r

articleJournal of the American Chemical SocietyMay 15, 2014Closed access

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

JTJingqi Tian QLQian Liu AMAbdullah M. Asiri XSXuping Sun

Changchun Institute of Applied Chemistry · Chinese Academy of Sciences

PubMed

Indexed incrossrefpubmed

Abstract

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.

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Topics & keywords

Topics

Keywords

Nanoporous
Chemistry
Nanowire
Cobalt
Phosphide
Cathode
Nanotechnology
Hydrogen

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