【摘要】 将泡沫镍浸入CuCl₂溶液中预处理后通过微波合成工艺在泡沫镍表面合成了Cu掺杂Ni₃S₂，详细研究了Cu掺杂对Ni₃S₂电解水性能的影响.研究发现，Cu的掺入可以有效改善Ni₃S₂在碱性与中性电解液中对H₂O的吸附与分解，从而提高Ni₃S₂基催化剂电解水的性能，在1 mol/L KOH电解液中电流密度为10 mA·cm^-2时过电位仅为121 mV，中性电解液中相应过电位为218 mV.更多还原

【Abstract】 The present work discloses an electrocatalytically inactive copper doping strategy to promote the water adsorption and dissociation process of Ni₃S₂ （Cu-Ni₃S₂） nanoparticles anchored on nickel foam （NF） towards the improved alkaline and neutral hydrogen evolution.Based on combined density functional theory calculations and electrochemical characterizations,the doping of Cu can accelerate the Volmer step and strengthen the water adsorption/dissociation on the Ni sites and S sites,respectively,during HER process.As a result,it exhibits superior and stable HER performances in both 1 mol/L KOH and 1 mol/L phosphate-buffered saline （PBS） solutions with the much lower overpotentials of 121 mV and 228 mV,respectively,at the current density of 10 mA·cm^-2,in comparison with those of bare Ni₃S₂.Therefore,we conclude that the tailored control of the water adsorption/dissociation capability of Ni₃S₂ will open up significant opportunities for a rational design of alkaline and neutral electrocatalysts from earth-abundant and stable materials.更多还原