| Pt／C催化剂的制备及其对甲醇电催化氧化的研究 |
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| 引用本文： | 高山,冯岚,鲁惠,陈金伟,姜春萍,彭德权,王瑞林.Pt／C催化剂的制备及其对甲醇电催化氧化的研究[J].纳米科技,2010(1):21-24. |
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| 作者姓名： | 高山 冯岚 鲁惠 陈金伟 姜春萍 彭德权 王瑞林 |
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| 作者单位： | 四川大学材料科学与工程学院,四川成都610065 |
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| 基金项目： | 科技部863项目(No.2006AA05Z102);;教育部科技创新工程重大项目培育资金项目(No.707050);;高等学校博士学科点专项科研基金项目(No.20060610023);;成都市科技局攻关计划项目(Nos.06GGYB449GX-030和07GGZD139GX) |
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| 摘 要： | 首次报道了以乙二胺四乙酸（EDTA）作为螯合剂，采用硼氢化钠还原氯铂酸制备Pt／C（Pt的质量分数为20％）纳米催化剂，TEM分析表明，通过改变反应的pH值可以获得分散度与粒径不同的Pt粒子，当pH=12．5时，Pt的分散度最高，平均粒径最小（3．2nm）。催化剂的退火处理研究表明，经270℃氮气氛围内退火后，其电催化活性有了显著提高。使用循环伏安法在甲醇的溶液中电催化氧化研究结果表明，在pH=12．5时制备的催化剂对甲醇的电催化氧化活性最高。
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| 关 键 词： | 乙二胺四乙酸 螯合剂 甲醇电催化氧化 循环伏安 |
Preparation of Pt/C Catalysts from Platinum Chelateded by EDTA and its Electrochemical Oxidation to Methanol |
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| Authors: | GAO Shan FENG Lan LU Hui CHEN Jin-wei JIANG Chun-ping PENG De-quan WANG Rui-lin |
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| Affiliation: | College of Materials Science and Engineering/a>;Sichuan University/a>;Chengdu 610065/a>;China |
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| Abstract: | Pt/C （20wt.%）nanocatalysts were prepared and reported firstly by the reduction of chloroplatinic acid with sodium borohydride, with EDTA as chelate agent. Analysis of Transmission electron microscopy indicated that the size and dispersion degree of nanocatalysts would be changed with the pH changing of the reaction solution. And the Pt/C prepared at the pH=12.5 of the reduction solution had the most well-dispersed and the smallest particle size of 3.2 nm. The annealing process to as-deposited Pt/C can improve the electrocatalytic activity to methanol electrochemical oxidation. The experimental results indicted as-deposited Pt/C at 270℃ for 2 h under N2 atmosphere exhibited the highest electrocatalytic activity activity for methanol electrochemical oxidation. |
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| Keywords: | EDTA chelate agent methanol electrochemical oxidation cyclic voltammetry |
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