石墨烯负载Pt催化剂的制备及催化氧还原性能

doi:10.3866/PKU.WHXB20110411

物理化学学报 >> 2011, Vol. 27 >> Issue (04): 858-862.doi: 10.3866/PKU.WHXB20110411

石墨烯负载Pt催化剂的制备及催化氧还原性能

李云霞¹, 魏子栋^1,2, 赵巧玲¹, 丁炜¹, 张骞^1,2, 陈四国^1,2

1. 重庆大学输配电装备及系统安全与新技术国家重点实验室, 化学化工学院, 重庆 400044;
2. 重庆大学材料科学与工程学院, 重庆 400044

收稿日期:2010-09-20 修回日期:2011-01-04 发布日期:2011-03-29
通讯作者: 魏子栋 E-mail:zdwei@cqu.edu.cn
基金资助:
国家自然科学基金(20806096, 20906107, 20936008), 重庆市政教育委员会(kjzh 08103), 重庆大学211工程三期创新人才培养建设计划研究生开放实验室(S-09013)和中央高校基本科研业务(CDJXS10221141, 11132229)资助项目

Preparation of Pt/Graphene Catalyst and Its Catalytic Performance for Oxygen Reduction

LI Yun-Xia¹, WEI Zi-Dong^1,2, ZHAO Qiao-Ling¹, DING Wei¹, ZHANG Qian^1,2, CHEN Si-Guo^1,2

1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China;
2. School of Material Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China

Received:2010-09-20 Revised:2011-01-04 Published:2011-03-29
Contact: WEI Zi-Dong E-mail:zdwei@cqu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20806096, 20906107, 20936008), Municipal Education Committee of Chongqing, China (kjzh 08103), Innovative Talent Training Project, Chongqing University, China (S-09013), Fundamental Research Funds for the Central University, China (CDJXS10221141, 11132229).

摘要/Abstract

摘要：

采用直接化学还原法, 以金属钠为还原剂, 四氯乙烯为碳源, 在石蜡油中不经氧化石墨(GO)和氧化石墨烯(GrO)而直接制备石墨烯(Gr), 然后将Pt纳米粒子担载在Gr基体上, 得到Pt/Gr催化剂, 并对其催化氧还原(OR)性能进行了研究. 通过X射线衍射(XRD), 透射电镜(TEM)和电化学测试对合成催化剂的结构、形貌和电化学性质进行了表征. 实验结果表明: 所制备的Pt/Gr催化剂具有较好的分散性, 平均粒径为3.1 nm; 氧还原起始电位比商业JM-Pt/C催化电极正移了24 mV; 交换电流密度达到1×10^-3 mA·cm^-2, 是商业JM-Pt/C催化电极的2.5倍.

关键词: 石墨烯, 铂, 氧还原, 燃料电池, 电催化

Abstract:

Graphene (Gr) is synthesized by the direct reduction of tetrachloroethylene with sodium in paraffin oil rather than by the intermediate steps of oxidized graphite (GO) and oxidized graphene (GrO). Gr is used as support for the subsequent deposition of Pt nanoparticles and the catalytic behavior during oxygen reduction (OR) on the as-prepared Pt/Gr is studied. The structure, morphology, composition, and surface properties of the as-prepared Pt/Gr catalysts were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and electrochemical measurements. We found that the Pt nanoparticles with a mean particle size of 3.1 nm were well-dispersed on the Gr. The onset potential of the oxygen reduction on the Pt/Gr electrode shifted to the positive direction by 24 mV compared with the electrode made from commercial Pt/C catalysts (Johnson-Matthey Co. JM-Pt/C). The exchange current density of the OR on the Pt/Gr electrode was found to be 1×10^-3 mA·cm^-2, which is 2.5 times as that of the electrode made from the JM-Pt/C catalysts.

Key words: Graphene, Platinum, Oxygen reduction, Fuel cell, Electrocatalysis

MSC2000:

O643

李云霞, 魏子栋, 赵巧玲, 丁炜, 张骞, 陈四国. 石墨烯负载Pt催化剂的制备及催化氧还原性能[J]. 物理化学学报, 2011, 27(04): 858-862.

LI Yun-Xia, WEI Zi-Dong, ZHAO Qiao-Ling, DING Wei, ZHANG Qian, CHEN Si-Guo. Preparation of Pt/Graphene Catalyst and Its Catalytic Performance for Oxygen Reduction[J]. Acta Phys. -Chim. Sin., 2011, 27(04): 858-862.

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石墨烯负载Pt催化剂的制备及催化氧还原性能

Preparation of Pt/Graphene Catalyst and Its Catalytic Performance for Oxygen Reduction

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