TiO_2纳米管掺杂Pt/C催化剂对甲醇电氧化性能影响  

Effects of TiO_2 nanotubes mixed with Pt/C electrocatalyst on electro-oxidation performance of methanol

作　　者：吴省[1] 蒋淇忠[1] 马紫峰[1] 胡里清 

机构地区：[1]上海交通大学化工系,上海200240 [2]上海神力科技有限公司,上海201401

出　　处：《电源技术》2007年第9期713-716,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目(No.20476055);973计划(No.2003CB214500)

摘　　要：利用电化学方法研究了TiO2纳米管掺杂商业Pt/C催化剂(JM公司)对甲醇电氧化性能的影响。通过对不同掺杂量、不同制备方法等研究,利用循环伏安法和恒电位氧化法等手段,表明:掺杂20%TiO2纳米管的电催化剂对甲醇氧化具有较高活性,这可能是由于Pt和Ti之间产生的相互作用,使得甲醇更容易被活化,而二氧化钛本身携带的氧源,更有助于催化氧化甲醇反应的中间产物,减弱了Pt催化剂中毒程度。The electrocatalysts were prepared by mixing commercial 20% Pt/C （from Johnson Matthery） with TiO2 nanotubes. The electrochemical behaviors were studied in sulfuric acid solution and methanol solution by cyclic voltammtry and chronoamperometry. Different additional quantities and preparation methods were evaluated. The results show that commercial 20% Pt/C electrocatalysts mixed with 20% （mass percentage） TiO2 nanotubes has the higher activity to oxidize the methanol, which may be attributed to the interaction between Pt and Ti. Furthermore, the oxygen source which TiO2 holds may help to the next oxidation of the intermediate from methanol electro-oxidation and may ease the poison degree of the Pt/C catalysts.

关 键 词：直接甲醇燃料电池 TIO2纳米管 电催化剂 掺杂 

分 类 号：TM911.42[电气工程—电力电子与电力传动]