碳气凝胶载铂催化剂对甲醇的电催化氧化性能  

Carbon Aerogel Supported Pt Catalyst for Electrocatalytic Oxidation of Methanol

作　　者：郭志军 朱红[2] 张新卫[1] 王芳辉[2] 郭玉宝[1] 

机构地区：[1]北京交通大学理学院,北京100044 [2]北京化工大学理学院,北京100029

出　　处：《材料研究学报》2010年第4期363-367,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金20876013;国家自然科学基金重点20636060;国际科技合作2009DFA63120资助项目~~

摘　　要：以用溶胶凝胶法制备的碳气凝胶(CA)作为催化剂载体,用间歇微波法制备了碳气凝胶载铂催化剂。用电感耦合等离子光谱仪(ICP)测定了催化剂中Pt的含量,用透射电镜(TEM)和X射线衍射(XRD)对催化剂的形貌、粒径分布以及颗粒粒度进行了表征。结果表明,碳气凝胶载铂催化剂粒子分布均匀、粒径集中,平均粒经为4 nm.用能量散射X射线能谱(EDX)分析了催化剂的化学成分,用循环伏安法、线形扫描伏安法和计时电流法对催化剂的电化学性能进行了表征.结果表明,以碳气凝胶为载体的催化剂比以活性炭为载体的催化剂具有更高的催化活性。Carbon aerogel（CA） as the catalyst support was synthesized via a sol-gel process. Pt/CA catalysts were prepared by intermittent microwave-assisted polyol process.The content of Pt was measured by inductively coupled plasma（ICP）.The results of X-ray diffraction（XRD） and transmission electron microscopy（TEM） measurements show that the catalyst particles distributed homogeneously.The mean particle size of Pt/CA is about 4 nm.The chemical contents of the catalysts were analyzed using energy diffraction X-ray（EDX）spectroscopy.The electrochemical property of carbon aerogel supported Pt catalyst for methanol oxidation was evaluated by cyclic voltammetry（CV）,linear-sweep voltammetry （LSV）,and chronoamperometry.The results of electrochemical measurements show that the activity of Pt/CA catalyst is better than that of Pt/C catalyst.

关 键 词：无机非金属材料 催化剂 碳气凝胶 催化性能 

分 类 号：TM911[电气工程—电力电子与电力传动]