过电位
电催化剂
磷化物
钴
制氢
化学
纳米颗粒
催化作用
氢
材料科学
无机化学
纳米技术
电极
化学工程
电化学
物理化学
有机化学
工程类
作者
Eric J. Popczun,Carlos G. Read,Christopher W. Roske,Nathan S. Lewis,Raymond E. Schaak
标识
DOI:10.1002/ange.201402646
摘要
Abstract Nanoparticles of cobalt phosphide, CoP, have been prepared and evaluated as electrocatalysts for the hydrogen evolution reaction (HER) under strongly acidic conditions (0.50 M H 2 SO 4 , pH 0.3). Uniform, multi‐faceted CoP nanoparticles were synthesized by reacting Co nanoparticles with trioctylphosphine. Electrodes comprised of CoP nanoparticles on a Ti support (2 mg cm −2 mass loading) produced a cathodic current density of 20 mA cm −2 at an overpotential of −85 mV. The CoP/Ti electrodes were stable over 24 h of sustained hydrogen production in 0.50 M H 2 SO 4 . The activity was essentially unchanged after 400 cyclic voltammetric sweeps, suggesting long‐term viability under operating conditions. CoP is therefore amongst the most active, acid‐stable, earth‐abundant HER electrocatalysts reported to date.
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