电催化惰性铜对Ni_(3)S_(2)表面水分子吸附/分解的改善及在碱性/中性电解液中析氢反应的促进研究  

Improvement of Water Adsorption/ Dissociation on Ni_(3)S_(2);Surface by Electrocatalytically Inactive Copper and Promotion of Hydrogen Evolution Reaction in Alkaline/Neutral Electrolytes

作　　者：张磊 高晓蕊 朱颖 刘阿灿 董慧龙 吴大军 韩志达 王威[3] 房勇 张杰 寇宗魁[4] 钱斌 王婷婷 ZHANG Lei;GAO Xiaorui;ZHU Ying;LIU Acan;DONG Huilong;WU Dajun;HAN Zhida;WANG Wei;FANG Yong;ZHANG Jie;KOU Zongkui;QIAN Bin;WANG Tingting(School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500;Jiangsu Key Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500;School of Materials Engineering,Jinling Institute of Technology,Nanjing 211169,China;Department of Materials Science and Engineering,National University of Singapore,Singapore 117574,Singapore;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]常熟理工学院电子信息工程学院,江苏常熟215500 [2]常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟215500 [3]金陵科技学院材料工程学院,江苏南京211169 [4]新加坡国立大学材料科学与工程学院,新加坡117574 [5]深圳大学物理与光电工程学院,广东深圳518060

出　　处：《常熟理工学院学报》2022年第2期8-12,共5页Journal of Changshu Institute of Technology

摘　　要：将泡沫镍浸入CuCl_(2)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Ni_(3)S_(2),详细研究了Cu掺杂对Ni_(3)S_(2)电解水性能的影响.研究发现,Cu的掺入可以有效改善Ni_(3)S_(2);在碱性与中性电解液中对H_(2)O的吸附与分解,从而提高Ni_(3)S_(2);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.The present work discloses an electrocatalytically inactive copper doping strategy to promote the water adsorption and dissociation process of Ni_(3)S_(2)(Cu-Ni_(3)S_(2)) 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 Ni_(3)S_(2).Therefore,we conclude that the tailored control of the water adsorption/dissociation capability of Ni_(3)S_(2)will open up significant opportunities for a rational design of alkaline and neutral electrocatalysts from earth-abundant and stable materials.

关 键 词：Ni_(3)S_(2) CU掺杂 析氢反应 

分 类 号：O469[理学—凝聚态物理]