氧还原电催化剂Pt/WO3-C的制备及稳定性研究

doi:10.3724/SP.J.1077.2013.13024

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

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

(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. 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/Abstract

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℃. WO₃presents 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

中图分类号:

TQ136

郭富荣, 田建华, 胡敏, 单忠强. 氧还原电催化剂Pt/WO₃-C的制备及稳定性研究[J]. 无机材料学报, 2013, 28(10): 1121-1126.

GUO Fu-Rong, TIAN Jian-Hua, HU Min, SHAN Zhong-Qiang. Synthesis of Pt/WO₃-C as Catalyst for Oxygen Reduction Reaction and Its Evaluation of Stability[J]. Journal of Inorganic Materials, 2013, 28(10): 1121-1126.

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氧还原电催化剂Pt/WO₃-C的制备及稳定性研究

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

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