In this study, the performance of transition metal oxysulfides as cathodes has been explored for a proton exchange membrane water electrolyzer (PEMWE). Simple electrodeposition and anion exchange methods provide facile control of the morphology and composition of Ni_yCo_1-yO_xS_z catalysts deposited as gas diffusion electrodes on carbon paper substrates. After sulfidation, the overpotential for the hydrogen evolution reaction (HER) was significantly reduced and the intrinsic activity of the HER showed volcano behaviors as a function of the composition and binding energy of S in the electrodes. The PEMWE employing such a cathode demonstrates a reasonable current density of 0.72 A/cm² at a cell voltage of 2.0 V. The results presented herein demonstrate that the non-noble catalyst can be adopted as a cathode in PEMWE operation.

在这项研究中，已经研究了质子交换膜水电解槽（PEMWE）过渡金属氧硫化物作为阴极的性能。简单的电沉积和阴离子交换方法可轻松控制作为气体扩散电极沉积在碳纸基材上的Ni _y Co _1-y O _x S _z催化剂的形态和组成。硫化后，放氢反应（HER）的过电势显着降低，HER的内在活性显示出火山行为与电极中S的组成和结合能的关系。使用这种阴极的PEMWE显示出0.72 A / cm ²的合理电流密度 电池电压为2.0 V时。本文提供的结果证明，非贵金属催化剂可以用作PEMWE操作中的阴极。