类普鲁士蓝衍生的中空金属磷化物(NiFe)2P@NF制备及其电催化性能研究

Preparation and Electrocatalytic Properties of Hollow Metal Phosphide(NiFe)2P@NF Derived from Prussian Blue Analogue

电催化水分解产氧对于解决当前严重的能源危机具有重要意义。本文报道了一种高效的双金属磷化物(NiFe)2P@NF电催化剂,该催化剂是利用生长在导电泡沫镍基底上的类普鲁士蓝作为前驱体,经过简单的磷化而制成的。该催化剂显示出高效的电催化水分解产氧能力,在1mol/L氢氧化钾溶液中,达到10 mA/cm2电流密度时,仅需过电位220 mV。同时,该催化剂还在浓碱液(30 wt%)当中具有高活性和高稳定性,这对于开发适用于大电流下的高效氧还原反应(OER)电催化剂具有指导意义。

Electrocatalytic water decomposition for oxygen production is of great significance to solve the current serious energy crisis. A highly efficient bimetallic phosphide(NiFe)2P@NF electrocatalyst is reported in this paper. It is made from Prussian blue,which is grown on the conductive foam nickel substrate,as a precursor and is simply phosphating. The catalyst shows high efficiency of electrocatalytic water decomposition and oxygen production. When the current density reaches 10 mA/cm2 in 1 mol/L potassium hydroxide solution,only 220 mV overpotential is needed. Meanwhile,the catalyst also has high activity and stability in concentrated alkali solution(30 wt%),which is of guiding significance for the development of high efficiency oxygen reduction reaction(OER)electrocatalyst suitable for high current.