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).
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).
作者
范鹏榆
金燕
胡宝山
FAN Pengyu;JIN Yan;HU Baoshan(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China)
出处
《中国科技论文在线精品论文》
2021年第4期535-540,共6页
Highlights of Sciencepaper Online
