物理化学学报 >> 2015, Vol. 31 >> Issue (5): 927-932.doi: 10.3866/PKU.WHXB201503241

电化学和新能源 上一篇    下一篇

双牺牲模板法制备一维管状Pt-Mn3O4-C复合物及其优越的甲醇电催化氧化性能

李丽, 何小丽, 覃涛, 戴富涛, 张小华, 陈金华   

  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
  • 收稿日期:2015-01-02 修回日期:2015-03-23 发布日期:2015-05-08
  • 通讯作者: 张小华, 陈金华 E-mail:mickyxie@hnu.edu.cn;chenjinhua@hnu.edu.cn
  • 基金资助:

    长江学者和创新团队发展计划(IRT1238), 国家自然科学基金(21275041, 21235002, J1210040), 国家自然科学基金创新研究群体科学基金(21221003), 湖南省自然科学基金(12JJ2010)及博士学科点专项科研基金(20110161110009)资助项目

Dual-Sacrificial Template Synthesis of One-Dimensional Tubular Pt-Mn3O4-C Composite with Excellent Electrocatalytic Performance for Methanol Oxidation

LI Li, HE Xiao-Li, QIN Tao, DAI Fu-Tao, ZHANG Xiao-Hua, CHEN Jin-Hua   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
  • Received:2015-01-02 Revised:2015-03-23 Published:2015-05-08
  • Contact: ZHANG Xiao-Hua, CHEN Jin-Hua E-mail:mickyxie@hnu.edu.cn;chenjinhua@hnu.edu.cn
  • Supported by:

    The project was 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), and 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Pt-Mn3O4-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.

关键词: Pt 纳米粒子, 管式Mn3O4-C, 电催化剂, 甲醇电氧化

Abstract:

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.

Key words: Pt nanoparticle, Tubular Mn3O4-C, Electrocatalyst, Methanol electrooxidation

MSC2000: 

  • O646