| Ho3＋对吸附CO电化学氧化的促进作用 |
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| 引用本文： | 高颖,邬冰,万丽娟,刘长鹏,邢巍,陆天虹.Ho3＋对吸附CO电化学氧化的促进作用[J].物理化学学报,2004,20(9):1108-1111. |
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| 作者姓名： | 高颖 邬冰 万丽娟 刘长鹏 邢巍 陆天虹 |
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| 作者单位： | Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;Department of Chemistry, Harbin Normal University, Harbin 150080;Department of Chemistry, Nanjing Normal University, Nanjing 210097 |
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| 基金项目： | 国家重点基础研究发展规划(G2000026408)，国家高技术研究发展计划(2001AA323060，2003AA517060)，江苏省科技厅高新技术基金(BG2003022)，江苏省教育厅高新技术产业化基金(JH02-080)，黑龙江省自然科学基金(B00-04)，黑龙江省教育厅基金(10511034)，国家“211”工 |
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| 摘 要： | 研究了吸附在Pt/C催化剂上的Ho3＋对吸附CO的电氧化的影响.结果表明,无论在中性和酸性溶液中,在较大的温度范围内,Ho3＋对CO在Pt/C催化剂上的电氧化都有促进作用,其原因是吸附Ho3＋的存在减弱了CO在Pt/C催化剂上的吸附强度.其次,在中性溶液中,Ho3＋对吸附CO的电氧化的促进作用比在酸性溶液中大.第三,无论在酸性还是中性溶液中,温度的升高有利于发挥Ho3＋对吸附CO的电氧化的促进作用.
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| 关 键 词： | CO Ho3＋ Pt 电氧化 |
| 收稿时间： | 2004-01-19 |
| 修稿时间： | 2004年1月19日 |
Promotion of Electrooxidation of Adsorbed CO by Ho3+ |
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| Gao Ying , Wu Bing Wan Li-Juan Liu Chang-Peng Xing We Lu Tian-Hong.Promotion of Electrooxidation of Adsorbed CO by Ho3+[J].Acta Physico-Chimica Sinica,2004,20(9):1108-1111. |
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| Authors: | Gao Ying Wu Bing Wan Li-Juan Liu Chang-Peng Xing We Lu Tian-Hong |
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| Institution: | Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;Department of Chemistry, Harbin Normal University, Harbin 150080;Department of Chemistry, Nanjing Normal University, Nanjing 210097 |
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| Abstract: | The effect of Ho3＋ adsorbed on the Pt/C catalyst on the electrooxidation of the adsorbed CO was studied. It was found that Ho3＋ adsorbed on the Pt/C catalyst could promote the electrooxidation of the adsorbed CO in both neutral and acidic solutions in a large temperature range. Firstly, it is due to that Ho3＋ could reduce the adsorption intensity of CO. Secondly, Eox and Ep of CO adsorbed on the Pt-Ho3＋/C catalyst in the neutral solution are more negative than that in the acidic solution, indicating that the promoting effect of Ho3＋ in the neutral solution is larger than that in the acidic solution. Thirdly, in both neutral and acidic solutions, the negative shift of Eox and Ep of CO adsorbed on the Pt-Ho3＋/C catalyst increases with increase of the temperature. Thus, the increase in the temperature promotes the action of Ho3＋. When the temperature is at 60 ℃,the negative shift of Eox and Ep of CO adsorbed on the Pt-Ho3＋/C catalyst is sufficient to avoid poisoning of Pt catalyst by CO. In addition, Pt-Ho3＋/C catalyst is easy to be prepared. Thus, it is possible to apply the Pt-Ho3＋/C catalyst in PEMFC (proton exchange membrane fuel cell) and DMFC(direct methanol fuel cell). |
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| Keywords: | CO Ho~(3 ) Pt Electrooxidation |
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