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表面活性剂辅助制备镍/氧化镍/氧化钴/硫氮共掺杂石墨烯复合物及其电催化析氧性能研究

发表时间:2021-12-31  浏览量:243  下载量:29
全部作者: 范鹏榆,金燕,胡宝山
作者单位: 重庆大学化学化工学院
摘 要: 采用表面活性剂(十二烷基硫酸钠)为模板,尿素为水解控制剂,通过简单的水热方法成功制备了硫氮共掺杂石墨烯支撑的棒状镍/氧化镍/氧化钴复合材料(NC@NSG)。同时,通过改变反应溶剂得到了不同形貌的镍/氧化镍/氧化钴复合物。此外,运用三电极体系在碱性条件下研究了其电催化析氧反应(oxygen evolution reaction,OER)。复合物样品采用场发射扫描电子显微镜(field emission scanning electron microscope,FE-SEM)、X射线衍射(X-ray diffraction,XRD)等手段进行表征。结果表明,NC@NSG表现出良好的电催化析氧性能,在1 mol/L KOH溶液中,10 mA∙cm-2时的过电位为358 mV(vs RHE),Tafel斜率值为124.16 mV∙dec-1,电化学活性面积为126.75 cm-2.
关 键 词: 物理化学;表面活性剂;镍/氧化镍/氧化钴/硫氮共掺杂石墨烯;电催化析氧
Title: Surfactant-assisted preparation of nickel/nickel oxide/cobalt oxide/S, N-doped graphene composites and their electrocatalytic oxygen evolution performance
Author: FAN Pengyu, JIN Yan, HU Baoshan
Organization: School of Chemistry and Chemical Engineering, Chongqing University
Abstract: The rod-shaped nickel/nickel oxide/cobalt oxide composites supported by sulfur and nitrogen co-doped graphene (NC@NSG) were synthesized by a simple hydrothermal technique using surfactant (sodium dodecyl sulfate) as the template and urea as the hydrolysis controlling agent. At the same time, the nickel/nickel oxide/cobalt oxide composites with different morphologies were obtained by changing the reaction solvent. In addition, three-electrode system was adopted to investigate the electrocatalytic performance for oxygen evolution reaction (OER) of the composites under alkaline conditions. The synthesized samples were characterized by field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD). The results indicated that NC@NSG showed high electrocatalytic performance for OER, the overpotential at the current density of 10 mA∙cm-2 was 358 mV (vs RHE) and the Tafel slope was 124.16 mV∙dec-1 in 1mol/L KOH solution. Electrochemically active surface area was 126.75 cm-2.
Key words: physical chemistry; surfactants; nickel/nickel oxide/cobalt oxide/S, N-doped graphene; electrocatalytic oxygen evolution
发表期数: 2021年12月第4期
引用格式: 范鹏榆,金燕,胡宝山. 表面活性剂辅助制备镍/氧化镍/氧化钴/硫氮共掺杂石墨烯复合物及其电催化析氧性能研究[J]. 中国科技论文在线精品论文,2021,14(4):535-540.
 
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