聚苯胺-聚醚嵌段共聚物对CNT担载Co/Fe纳米粒子的结构调控及其氧还原反应

项目名称： 聚苯胺-聚醚嵌段共聚物对CNT担载Co/Fe纳米粒子的结构调控及其氧还原反应

项目编号： No.51273103

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 郭建伟

作者单位： 清华大学

项目金额： 80万元

中文摘要： 提高质子交换燃料电池的阴极催化剂活性、降低成本对新能源应用具有重大意义，非Pt催化剂的纳米复合与含N碳化物载体的担载为此开辟了有效途径。本申请拟首先合成分子量适宜的聚苯胺-聚醚嵌段共聚物(PANI-b-PEO)，进而通过PANI嵌段与碳纳米管(CNT)的π-π作用，制备PANI-b-PEO非共价修饰CNT ((PANI-b-PEO)-CNT)复合载体，从而通过(PANI-b-PEO)与CNT计量比调控(PANI-b-PEO)-CNT包覆密度，促进复合载体活化。在此基础上，通过改进Turkevich法，实现以Co、Fe的纳米复合粒子在复合载体上的原位可控担载(CoxFey /(PANI-b-PEO)-CNT)，系统研究其电催化氧还原反应，并通过调节PANI、PEO嵌段分子量优化复合载体亲水/憎水微观界面以强化氧气传输，从而为新型电池阴极催化剂的高性能化和低成本化提供新方法和理论基础。

中文关键词： 导电高分子；碳纳米管；纳米；电催化；燃料电池

英文摘要： To increase the activity while decrease cost in cathode catalyst for proton exchange membrane fuel cell is significant for new energy application, and the nano-composite of non-Pt catalyst loaded on nitrogen containing carbon support provides effective route for this purpose. In this application, we planned to synthesis adaptable molecular weight of PANI-b-PEO block copolymer initially. With π-π interaction between the block of PANI and carbon nanotube (CNT), PANI-b-PEO non-covalent modified CNT ((PANI-b-PEO)-CNT) composite support can further be obtained. Therefore, the wrapping density of (PANI-b-PEO)-CNT can be adjusted by stoichiometric ratio of PANI-b-PEO and CNT, making composite support active. On the above basis, Co and Fe composited nanoparticles can be IN-SITU controllably loaded on the composite support by Turkvevich method, to form (CoxFey /(PANI-b-PEO)-CNT), whose electo-catalysis of oxygen reduction reaction can be systematically studied. Further adjust for PANI and PEO block molecular weight, the hydrophobic and hydrophilic micro-interface for composite support can be optimized thus increasing oxygen transfer. All these efforts will provide new methods and theories for high performance and low cost of cathode catalyst for novel cells.

英文关键词： conducting polymer；carbon nanotube；nano；electro-catalysis；fuel cell