RuAg/TiO_(2)-C催化剂的制备及对甲醇的电催化氧化性能  

Preparation of C-doped porous TiO_(2)supported RuAg catalyst for methanol electro-oxidation

作　　者：鞠剑峰[1] 吴东辉[1] 华平[1] 陈娇[1] JU Jianfeng;WU Donghui;HUA Ping;CHEN Jiao(School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,Jiangsu,China)

机构地区：[1]南通大学化学化工学院,江苏南通226019

出　　处：《精细化工》2021年第3期566-571,共6页Fine Chemicals

基　　金：教育部留学回国人员科研启动基金(20141685);南通市科技局项目(JC2018118)。

摘　　要：采用改性溶胶-凝胶法和水热合成法制备了C掺杂多孔纳米TiO_(2),以其为载体制备了一种RuAg/TiO_(2)-C催化剂。采用XRD、TEM、EDS、XPS及电化学分析对催化剂的结构和性能进行了表征,测定了其对甲醇的电催化氧化性能。结果表明,RuAg的负载和C的掺杂提高了TiO_(2)对甲醇的电催化性能,RuAg/TiO_(2)-C对甲醇电催化的循环伏安曲线中未见甲醇氧化中间产物的氧化峰,0.54 V处有一个较大的甲醇氧化峰,其峰电流密度为5.8 mA/cm^(2),RuAg/TiO_(2)-C比商用PtRu/C催化剂具有更高的催化活性和抗毒性,RuAg合金的负载以及RuAg合金与C掺杂多孔纳米TiO_(2)载体之间较强的相互作用是其对甲醇催化性能提高的主要因素。C-doped porous nano-TiO_(2)was prepared by modified sol-gel method and hydrothermal method.Then,it was used as support to fabricate RuAg/TiO_(2)-C catalyst.The structure and electrochemical properties of RuAg/TiO_(2)-C catalyst were characterized by XRD,TEM,EDS,XPS and electrochemical analysis.The electrocatalytic oxidation of methanol was measured.The results showed that the loading of RuAg and the doping of C improved the electrocatalytic activity of RuAg/TiO_(2)-C catalyst for methanol oxidation.The cyclic voltammograms of RuAg/TiO_(2)-C catalyst revealed that there was a larger methanol oxidation peak at 0.54 V with a peak current density of 5.8 mA/cm^(2).No oxidation peak of intermediates was observed on the reverse scan in the cyclic voltammograms.RuAg/TiO_(2)-C catalyst exhibited higher catalytic activity and better anti-poisoning ability for methanol oxidation than commercial PtRu/C catalyst.The high catalytic activity of RuAg/TiO_(2)-C for methanol oxidation was attributed to the strong interaction between RuAg nano alloy and C-doped porous TiO_(2).

关 键 词：多孔纳米TiO_(2) 直接甲醇燃料电池 甲醇氧化 催化剂 RuAg合金 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]