摘要
简单快速地制备活性高、稳定好的电催化剂用于电解水制氢具有重要意义。以六水合硝酸钴为原料,利用三电极体系电化学工作站,在-1.0 V恒电位下在镍网上快速电沉积制备出Co(OH)_(2)@NF,采用XRD、XPS和SEM对Co(OH)_(2)@NF进行物相分析和形貌表征,在1 mol/L KOH电解液中对其电催化析氧性能进行了测试。结果表明,超薄片状结构增加了Co(OH)_(2)@NF与电解液的接触面积,增大了参与反应的有效活性位点数量。驱动10 mA/cm^(2)的电流密度需要过电位为280 mV,塔菲尔斜率为70 mV/dec;具有良好的析氧稳定性和耐久性。
Facile and fast fabrication of highly active and stable nano-catalysts for water electrolysis is important for oxygen reaction.Herein,the ultrathin Co(OH)_(2) nanosheets arrays are directly grown on Ni foam through a facile one-step electrodeposition with cobalt nitrate hexahydrate.The structure and performance are studied by XRD,XPS and SEM.The electrocatalytic oxygen evolution reaction(OER)properties are tested in 1 mol/L KOH electrolyte.The results show that the ultrathin Co(OH)_(2) nanosheets greatly improve the specific surface area and increase the number of effective active sites.When the current density is 10 mA/cm^(2),the over potential is 280 mV and the Tafel slope is 70 mV/dec.It has good OER stability and durability.
作者
邹祥宇
卫学玲
包维维
艾桃桃
李文虎
寇领江
ZOU Xiangyu;WEI Xueling;BAO Weiwei;AI Taotao;LI Wenhu;KOU Lingjiang(School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000,China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第5期5186-5192,共7页
Journal of Functional Materials
基金
国家自然科学基金青年项目(51504147)
陕西省科技厅青年项目(2021JQ-762)。
