| 高分散直接甲醇燃料电池Pt／C阴极电催化剂的制备过程机理与表征 |
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| 引用本文： | 周振华,周卫江,姜鲁华,王素力,汪国雄,孙公权,辛勤.高分散直接甲醇燃料电池Pt／C阴极电催化剂的制备过程机理与表征[J].催化学报,2004,25(1):65-69. |
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| 作者姓名： | 周振华 周卫江 姜鲁华 王素力 汪国雄 孙公权 辛勤 |
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| 作者单位： | 1. 中国科学院大连化学物理研究所,辽宁大连,116023
2. 中国科学院大连化学物理研究所,辽宁大连,116023;中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连,116023 |
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| 基金项目： | 中国科学院科研创新基金项目 (K2 0 0 3D2)，国家自然科学基金项目(2 0 173 0 60 )，大连市青年科技人才基金项目 |
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| 摘 要： | 通过调变的多元醇法制备了40％Pt／C直接甲醇燃料电池阴极电催化剂，应用透射电镜（TEM）及X射线衍射（XRD）方法表征催化剂．结果表明，由该制备方法可得到高分散，金属粒子粒径分布窄的高载量贵金属催化剂．TEM统计结果表明，调变多元醇法制备的40％Pt／C催化剂的金属粒子平均粒径约为2．9nm．直接甲醇燃料电池单池性能测试表明，该方法制得的40％Pt／C的电催化氧还原能力比同型商品催化剂更好．另外，利用UV－Vis光谱研究了催化剂的制备过程．结果表明，在调变的多元醇法中，Pt4＋的还原是一步完成的．
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| 关 键 词： | 电催化剂 多元醇法 直接甲醇燃料电池 铂 碳 |
| 文章编号： | 0253-9837(2004)01-0065-05 |
| 收稿时间： | 2004-01-25 |
Mechanism of Preparation Process and Characterization of Highly Dispersed Pt/C Cathode Electrocatalyst for Direct Methanol Fuel Cells |
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| ZHOU Zhenhua ,ZHOU Weijiang ,JIANG Luhua ,WANG Suli ,WANG Guoxiong ,SUN Gongquan ,XIN Qin.Mechanism of Preparation Process and Characterization of Highly Dispersed Pt/C Cathode Electrocatalyst for Direct Methanol Fuel Cells[J].Chinese Journal of Catalysis,2004,25(1):65-69. |
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| Authors: | ZHOU Zhenhua ZHOU Weijiang JIANG Luhua WANG Suli WANG Guoxiong SUN Gongquan XIN Qin |
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| Institution: | ZHOU Zhenhua 1,ZHOU Weijiang 1,JIANG Luhua 1,WANG Suli 1,WANG Guoxiong 1,SUN Gongquan 1,XIN Qin 1,2* |
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| Abstract: | A modified polyol process was used to prepare 40%Pt/C electrocatalyst for direct methanol fuel cells (DMFC). TEM and XRD were carried out to characterize the as synthesized samples. The results of both measurements consistently demonstrated that the highly dispersed Pt nanoparticles with narrow size distribution supported on carbon can be achieved by this process. The statistic result based on TEM measurement showed that the Pt particles have a mean size of 2 9 nm. The DMFC performance tests indicated that the in house Pt/C electrocatalyst has better electrocatalytic activity and stability for oxygen reduction reaction in DMFC than its commercial counterpart. In addition, UV Vis spectroscopy measurements verified that the redox reaction between PtCl 2- 6 and ethylene glycol takes place via a single step reaction path. |
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| Keywords: | electrocatalyst polyol process direct methanol fuel cell platinum carbon |
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