| 制备方法对Pt/CA催化剂电化学性能的影响 |
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| 引用本文： | 魏松丽,吴丁财,符若文.制备方法对Pt/CA催化剂电化学性能的影响[J].中山大学学报(自然科学版),2010,49(5). |
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| 作者姓名： | 魏松丽 吴丁财 符若文 |
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| 作者单位： | 中山大学化学与化学工程学院∥聚合物复合材料及功能材料教育部重点实验室,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金资助项目，广东省自然科学基金资助项目 |
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| 摘 要： | 以炭气凝胶为载体,分别以甲醛、硼氢化钠和乙二醇为还原剂制备了Pt/CA催化剂。采用XRD技术对催化剂上Pt的分散度和粒径大小进行了分析。结果表明,以乙二醇为还原剂制备的Pt/CA催化剂上Pt分布最均匀,粒径为2.2 nm。通过电化学性能测试,发现3种催化剂的活性大小顺序为Pt/CA-EGPt/CA-HCHOPt/CA-NaBH4,其中催化剂Pt/CA-EG的电化学活性比表面积达到74.1 m2/g,比质量活性达到248.8 A/g,并且其电化学性能远远好于商用催化剂。
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| 关 键 词： | 直接甲醇燃料电池 炭气凝胶 Pt/CA催化剂 乙二醇还原法 |
| 收稿时间： | 2009-12-24; |
Influence of Preparation Method on the Electrochemical Performance of Pt/Carbon Aerogel Catalyst |
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| WEI Songli,WU Dingcai,FU Ruowen.Influence of Preparation Method on the Electrochemical Performance of Pt/Carbon Aerogel Catalyst[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2010,49(5). |
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| Authors: | WEI Songli WU Dingcai FU Ruowen |
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| Institution: | (School of Chemistry and Chemical Engnieering∥PCFM Laboratory,Sun Yat sen University,Guangzhou 510275,China) |
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| Abstract: | Platinum catalysts supported on carbon aerogel (Pt/CA) were prepared by different reducing agents, including in HCHO, NaBH4 and EG (ethylene glycol). The Pt/CA catalysts were characterized by X-ray diffraction and cyclic voltammetry. The results indicated that the Pt/CA catalysts synthesized with ethylene glycol reducing agent achieved an extremely uniform Pt dispersion. The size of the Pt nanoparticles was 2.2 nm. Electrochemical analysis showed that the activity order was Pt/CA-EG>Pt/CA-HCHO>Pt/CA-NaBH4. The electrochemical active area and mass activity of the Pt/CA-EG catalyst reached 74.1 m2/g and 248.8 A/g, respectively, which were significantly higher than those of commercial Pt/C catalysts. |
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| Keywords: | direct methanol fuel cells carbon aerogel Pt/carbon aerogel catalyst ethylene glycol |
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