以阵列二氧化钛纳米棒为载体制备一体化析氧电极  

Preparation of integrated oxygen evolution electrode using array of titanium dioxide nanorods as carrier

作　　者：董超振[1] 刘文兵[1] 王新东[1] DONG Chaozhen LIU Wenbing WANG Xindong(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《有色金属科学与工程》2017年第2期52-56,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(91010002;50874008)

摘　　要：以碳纸为支撑体,氯铱酸为前体,利用二氧化钛纳米棒阵列作为载体,采用浸渍-热分解法成功制备IrO_2-TiO_2/C一体化析氧电极.通过扫描电镜(SEM)、XRD、XPS和电化学方法——循环伏安(CV)、交流阻抗(EIS)等手段,研究载体形貌对析氧电极性能的影响.结果表明:二氧化钛载体能有效抑制支撑体碳纸在高电位下的腐蚀,当电压为2.4 V时,极化电流才仅为13.2 mA/cm^2,一体化析氧电极积分电荷由87.2 mC/cm^2增至178.5 mC/cm^2,电极电化学反应阻抗由3.13Ω·cm^2降低到1.62Ω·cm^2,极大地提高了析氧电极的接触面积和催化剂的电催化活性.The impregnation thermal decomposition method was successfully used to prepare IrO2-TiOJC oxygen evolution electrode with chloro iridic acid as a precursor, carbon paper as support, the array of TiO2 nanorods as the carrier. Scanning electron microscopy （SEM）, XRD, XPS and electrochemical methods cyclic vohammetry （CV） and electrochemical impedance spectroscopy （EIS） were used to study the effect of the morphology of the carrier on the performance of oxygen evolution electrode. The results show that the titanium dioxide carrier can effectively inhibit corrosion of the supporting body of carbon paper under high potential; integral charge of the integrated oxygen evolution electrode increases from 87.2 mC/cm^2 to 178.5 mC/cm^2,and electrochemical reaction resistance reduces from 3.13 Ω·cm^2 to 1.62 Ω·cm^2 when voltage is 2.4 V and polarization current is 13.2 mA/cm^2, which greatly improves the oxygen evolution electrode contact area and electrocatalytic activity.

关 键 词：水电解 二氧化钛纳米棒 二氧化铱 一体化析氧电极 

分 类 号：TF803.27[冶金工程—有色金属冶金] O643.32[理学—物理化学]