无机材料学报 ›› 2013, Vol. 28 ›› Issue (10): 1121-1126.DOI: 10.3724/SP.J.1077.2013.13024 CSTR: 32189.14.SP.J.1077.2013.13024

• 研究论文 • 上一篇    下一篇

氧还原电催化剂Pt/WO3-C的制备及稳定性研究

郭富荣1, 田建华1, 胡 敏2, 单忠强1   

  1. (天津大学 1. 化工学院; 2. 计算机科学与技术学院, 天津 300072)
  • 收稿日期:2013-01-10 修回日期:2013-03-04 出版日期:2013-10-20 网络出版日期:2013-09-18
  • 作者简介:郭富荣(1987-), 女, 硕士研究生. E-mail: guofurong1987@163.com
  • 基金资助:

    国家重点基础研究发展计划(973计划)(2009CB220105)

Synthesis of Pt/WO3-C as Catalyst for Oxygen Reduction Reaction and Its Evaluation of Stability

GUO Fu-Rong1, TIAN Jian-Hua1, HU Min2, SHAN Zhong-Qiang1   

  1. (1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; 2. School of Computer Science and Technology, Tianjin University, Tianjin 300072, China)
  • Received:2013-01-10 Revised:2013-03-04 Published:2013-10-20 Online:2013-09-18
  • About author:GUO Fu-Rong. E-mail: guofurong1987@163.com
  • Supported by:

    National Basic Research Program of China (973 Program) (2009CB220105)

摘要: 采用化学沉淀法由HCl-Na2WO4制备WO3-C复合载体, 通过微波辅助乙二醇还原法制备Pt/WO3-C复合载体催化剂。研究了WO3含量以及热处理温度对Pt/WO3-C催化剂性能的影响, 采用X射线衍射、透射电子显微镜和能量散射光谱对Pt/WO3-C的物化结构和组成进行了表征。结果表明, WO3的最佳含量为10wt%, N2气氛中热处理适宜温度为250℃。所制备的Pt/WO3-C催化剂中WO3以单斜晶型存在, Pt颗粒的平均粒径为2.77 nm。通过循环伏安法和单体质子交换膜燃料电池极化曲线测试了Pt/WO3-C催化剂的电化学性能, 证实了Pt与WO3之间存在协同催化作用, 与Pt/C催化剂相比, Pt/WO3-C的催化活性和稳定性都有明显改善。

关键词: 氧还原, Pt/WO3-C, 热处理, 稳定性

Abstract: The WO3-C hybrid materials were prepared by chemical precipitation reaction of hydrochloric and sodium tungstate in carbon suspension. Pt nanoparticles were deposited by microwave-assisted polyol process on WO3-C. Influences of WO3 contents and heat-treatment temperature on the catalytic activity for oxygen reduction and the single proton exchange membrane fuel cell performance were analyzed systematically. X-ray diffraction(XRD), transmission electron microscope (TEM) and energy dispersion spectrometry (EDS) were used to characterize the Pt/WO3-C catalysts. The results show that the optimum content of WO3 is 10wt%, and heat-treatment temperature in N2 flow is 250℃. WO3 presents as monoclinic phase and about 2.77 nm Pt metal crystallites disperse on WO3-C. Cyclic voltammetry and polarization curves of single cells are investigated to measure the electrocatalytic activity. The synergistic catalytic effect is found between Pt and WO3. The Pt/WO3-C catalysts are more active for oxygen reduction than traditional Pt/C. The accelerated potential cycling test and single cell life test indicate that the Pt/WO3-C catalysts possess substantially enhanced stability in comparison with Pt/C catalysts.

Key words: oxygen reduction reaction, Pt/WO3-C, heat treatment, stability

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