快速制备不锈钢自支撑析氧催化剂的性能研究

Study on Performance of Self-supporting Oxygen Evolution Electrocatalyst for Rapid Prepared Stainless Steel Mesh

将304不锈钢网在含2 mol·L^(-1) Ni^(2+)的沸腾溶液中处理120 s,制得了催化析氧性能优异、能规模化生产的自支撑电催化剂(SS/Ni-OH2M-120s).该催化剂在10 mA·cm^(-2)电流密度下的过电位为214 mV,比未经处理的304不锈钢网降低约127 mV,在20 mA·cm^(-2)的电流密度下恒电位极化10 h后,催化性能没有出现明显变化,说明具有良好的稳定性.将其与Pt网电极组成全分解水装置,在1.61 V总分解电压下,便可以提供10 mA·cm^(-2)的电流密度,比Pt-Mesh//IrO_(2)/SS全分解水装置电压降低了0.23 V.

The 304 stainless steel mesh was treated in a boiling solution containing 2 mol·L^(-1) nickel source for 120 s to obtain a self-supporting electrocatalyst(denoted SS/Ni-OH2M-120s)with excellent Oxygen Evolution Reaction(OER)performance.This self-supporting electrocatalyst facilitated industrialization and scale production.The overpotential of SS/Ni-OH2M-120s electrocatalyst obtained at the current density of 10 mA·cm^(-2) was 214 mV,which was about 127 mV lower than that of the blank 304 stainless steel mesh.After the constant potential polarization for 10 h at a current density of 20 mA·cm^(-2),the catalytic performance displayed no obvious change,indicating excellent stability.When SS/Ni-OH2M-120s anode was combined with the Pt mesh cathode(Pt-Mesh//SS/Ni-OH2M-120s)to make overall splitting water,a decomposition voltage of 1.61 V at the current density of 10 mA·cm^(-2) was achieved,which was 0.23 V lower than the commercial Pt-Mesh//IrO_(2)/SS.