双牺牲模板法制备一维管状Pt-Mn_3O_4-C复合物及其优越的甲醇电催化氧化性能（英文）  

Dual-Sacrificial Template Synthesis of One-Dimensional Tubular Pt-Mn_3O_4-C Composite with Excellent Electrocatalytic Performance for Methanol Oxidation

作　　者：李丽[1] 何小丽[1] 覃涛[1] 戴富涛 张小华[1] 陈金华[1] 

机构地区：[1]湖南大学化学化工学院,化学生物传感与计量学国家重点实验室,长沙410082

出　　处：《物理化学学报》2015年第5期927-932,共6页Acta Physico-Chimica Sinica

基　　金：supported by the Program for Changjiang Scholars and Innovative Research Team in University,China(IRT1238);National Natural Science Foundation of China(21275041,21235002,J1210040);Foundation for Innovative Research Groups of National Natural Science Foundation of China(21221003);Hunan Provincial Natural Science Foundation,China(12JJ2010);Specialized Research Fund for the Doctoral Program of Higher Education,China(20110161110009)~~

摘　　要：通过双牺牲模板法合成了以一维管状Mn3O4-C为催化剂载体的新型Pt基电催化剂.催化剂的表面形貌、晶体结构及其组成分别采用透射电镜、X射线衍射仪、能量散射X射线光谱进行表征.通过循环伏安法对PtMn3O4-C复合物的电化学性能进行了测试.结果表明平均粒径为1.8 nm的Pt纳米颗粒均匀分散在管式Mn3O4-C载体上,与商业的E-TEK Pt/C催化剂(20%(w,质量分数)Pt)相比,Pt-Mn3O4-C对甲醇氧化有更好的电催化活性和更高的稳定性.Pt纳米粒子在Mn3O4-C上的均匀分散及Pt和Mn3O4的协同催化效应使得Pt-Mn3O4-C具有优异的性能.A new Pt-based electrocatalyst with one-dimensional tubular Mn3O4-C as the catalyst support was synthesized by a dual-sacrificial template strategy. The morphology, structure, and composition of the Pt-Mn3O4-C composite were characterized by transmission electron microscopy, X-ray diffraction, and energy dispersive X-ray spectroscopy, respectively. The electrochemical performance of Pt-Mn3O4-C was investigated by cyclic voltammetry. The results show that Pt nanoparticles with an average size of 1.8 nm are uniformly dispersed on tubular Mn3O4-C, and Pt-Mn3O4-C exhibits superior electrocatalytic activity and higher stability for methanol oxidation than the commercial E-TEK Pt/C catalyst（20%（w, mass fraction） Pt）. The excellent performance of Pt-Mn3O4-C is attributed to the uniform dispersion of Pt nanoparticles on Mn3O4-C and the synergetic catalytic effect of Pt and Mn3O4.

关 键 词：PT纳米粒子 管式Mn3O4-C 电催化剂 甲醇电氧化 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]