Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802 (USA).
Angew Chem Int Ed Engl. 2014 May 19;53(21):5427-30. doi: 10.1002/anie.201402646. Epub 2014 Apr 11.
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 H2SO4, 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 H2SO4. 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.
磷化钴纳米粒子（CoP）已被制备并评估为在强酸条件下（0.50 M H2SO4，pH 0.3）用于析氢反应（HER）的电催化剂。通过使 Co 纳米粒子与三辛基膦反应，合成了均匀的、多面的 CoP 纳米粒子。CoP 纳米粒子负载在 Ti 载体上的电极（2 mg cm(-2) 的质量负载）在过电势为-85 mV 时产生 20 mA cm(-2) 的阴极电流密度。在 0.50 M H2SO4 中持续生产氢气 24 小时后，CoP/Ti 电极稳定。经过 400 次循环伏安扫描后，活性基本不变，表明在工作条件下具有长期可行性。因此，CoP 是迄今为止报道的最活跃、耐酸、丰富的 HER 电催化剂之一。
