文献类型：期刊文献

中文题名：微波功率和微波作用时间对脉冲微波辅助化学还原合成的Pt/C催化剂性能的影响(英文)

英文题名：Effect of Microwave Power and Irradiation Time on the Performance of Pt/C Catalysts Synthesized by Pulse-Microwave Assisted Chemical Reduction

作者：王喜照[1,2];郑俊生[1,2];符蓉[1,3];马建新[1,2]

机构：[1]同济大学新能源汽车工程中心,上海201804;[2]同济大学汽车学院,上海201804;[3]华东理工大学资源与环境工程学院,上海200237

年份：2011

卷号：32

期号：4

起止页码：599

中文期刊名：催化学报

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：CSTPCD;;EI(收录号：20111813959213);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000290074100012)】；北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：This work was supported by the National Natural Science Foundation of China (21006073), the Shanghai Rising-Star Program (11QA1407200), the Shanghai Leading Academic Discipline Project (B303), the Open-Project Program of the State Key Laboratory of Chemical Engineering (SKL-ChE-08C07), and the Program of Introducing Talents of Discipline to Universities (B08019).

语种：中文

中文关键词：脉冲微波;微波功率;微波作用时间;铂;碳;负载型催化剂;燃料电池

外文关键词：pulse-microwave; microwave power; irradiation time; platinum; carbon; supported catalyst; fuel cell

摘要：采用脉冲微波辅助化学还原法制备了质子交换膜燃料电池(PEMFC)用Pt/C催化剂.通过X射线衍射(XRD)和高分辨透射电镜(HRTEM)等分析技术对催化剂的微观结构和形貌进行了表征.利用循环伏安(CV)法计算了催化剂的电化学比表面积.在此基础上制备了膜电极(MEA)并组装成单电池,考察了制备的Pt/C催化剂作为单电池阴极催化剂材料的电催化性能.微波功率和微波作用时间对Pt颗粒直径和分散有重要影响.XRD和HRTEM结果表明,在微波功率为2kW,微波作用12s,豫驰180s,且重复6次的条件下,制得的催化剂中铂纳米粒子颗粒直径小,分散均一,其平均粒径为1.9nm.CV结果表明,该条件下制得的催化剂电化学比表面积达到72.3m2/g,且该催化剂对应的单电池最高功率密度为0.572W/cm2.
Pt/C catalysts for polymer electrolyte membrane fuel cells were synthesized by pulse-microwave assisted chemical reduction.X-ray diffraction （XRD） and high resolution transmission electron microscope （HRTEM） were used to investigate the microstructure and morphology of the as-prepared catalysts.The electrochemical surface area （ESA） was studied by cyclic voltammetry （CV）.Membrane electrode assemblies were fabricated and the as-prepared catalysts were evaluated.The particle size and distribution of Pt nanoparticles on the carbon support greatly depended on the microwave power and irradiation time.XRD and HRTEM showed that the Pt/C catalysts possessed the smallest mean Pt particle size （1.9 nm） and the most uniform distribution among all the synthesized catalysts when the microwave was on for 12 s and off for 180 s,and this was repeated 6 times at a microwave power of 2 kW.A CV revealed that the ESA of the catalyst was 72.3 m2/g and the corresponding maximum power density was 0.572 W/cm2.