摘要
过渡金属硫化物因其制备简单、导电性好以及具有丰富的氧化还原性质被广泛用作电催化剂。在导电基底上原位生长复合材料被认为可有效提高催化剂的电催化性能。基于此,利用简单、可控的电沉积法,以泡沫铜作为导电基底,以硝酸铜和硝酸钴作为铜源和钴源原位制备了Co9S8-Cu S纳米片阵列。在三电极体系中,将Co9S8-Cu S纳米片阵列作为阳极在1 mol/L KOH溶液中得到了优异的电催化析氧性能,Co9S8-Cu S纳米片阵列获取50 m A/cm2电流密度所需的过电位仅为370 m V,其Tafel斜率低至108 m V/dec,其优异的电催化析氧性能归因于较大的催化活性面积以及复合材料中Co9S8与Cu S之间的协同作用。
Due to the simple preparation process,excellent electronic conductivity and rich redox properties,transition metal sulfides are considered as the promising electrocatalyst candidates in electrocatalytic reactions.Hybrid materials in-situ grown on conductive support is a well-known strategy to enhance their electrocatalytic performance.A simple and controllable electrodeposition method was used to synthesize Co9S8-CuS nanosheet arrays in-situ grown on porous copper foam by using copper nitrate and cobalt nitrate.In a three-electrode system,Co9S8-CuS was used as the anode to drive electrocatalytic oxygen evolution reaction in 1 mol/L KOH and remarkable electrocatalytic performance was obtained.The over potential to reach the current density of 50 mA/cm2 was as low as 370 mV,the corresponding to a low Tafel slope of 108 mV/dec.The remarkable electrocatalytic performance could be obtained due to its available catalytic active sites and the synergistic effect on the interface of Co9S8 and CuS.
作者
郭芬岈
马雨涵
戎怡珅
黎挺挺
GUO Fen-ya;MA Yuhan;RONG Yi-shen;LI Ting-ting(School of Material Science,Medical School,Ningbo University,Ningbo 315211,China;Chemical Engineering,Medical School,Ningbo University,Ningbo 315211,China)
出处
《化学试剂》
CAS
北大核心
2019年第11期1110-1114,共5页
Chemical Reagents
基金
国家自然科学基金青年基金资助项目(21603110)
宁波大学大学生科研创新项目(2019SRIP2507)
关键词
电催化
析氧反应
电沉积
Co9S8-Cu
S
协同作用
electrocatalysis
oxygen evolution reaction
electrodeposition
Co9S8-CuS
synergistic effect
