| 金电极上氢析出反应的温度效应 |
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| 引用本文： | 汤志强,廖玲文,郑勇力,康婧,陈艳霞.金电极上氢析出反应的温度效应[J].化学物理学报,2012,25(4):469-474. |
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| 作者姓名： | 汤志强 廖玲文 郑勇力 康婧 陈艳霞 |
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| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室(筹)，化学物理系，合肥230026 |
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| 摘 要： | 用循环伏安法研究了多晶金电极在0.1 mol/L HClO4和0.1 mol/L KOH中氢析出反应的温度效应．在278～333 K时，随温度和电位的增加氢析出反应电流显著增加， 在酸性溶液中Tafel斜率从118 mV/dec增加到146 mV/dec，超电势从0.2 V增加到0.35 V时，其活化能从37 kJ/mol降低至30 kJ/mol，反应的指前因子比在碱性溶液中的高出一个数量级．在碱性溶液中Tafel斜率约为153±15 mV/dec，且未呈现明显随温度变化的趋势．平衡电位的反应活化能在酸性和碱性溶液中分别约为48和34 kJ/mol．当超电势增加时，在碱性溶液中的指前因子单调增加，在酸性溶液中指前因子不随电位而变化．还讨论了金电极上氢析出反应在酸性和碱性溶液中具有不同的随电势变化的动力学参数的原因及其与反应机理的联系．
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| 关 键 词： | 氢析出反应，金电极，温度效应，活化能，对称因子 |
| 收稿时间： | 5/8/2012 12:00:00 AM |
Temperature Effect on Hydrogen Evolution Reaction at Au Electrode |
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| Zhi-qiang Tang,Ling-wen Liao,Yong-li Zheng,Jing Kang and Yan-xia Chen.Temperature Effect on Hydrogen Evolution Reaction at Au Electrode[J].Chinese Journal of Chemical Physics,2012,25(4):469-474. |
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| Authors: | Zhi-qiang Tang Ling-wen Liao Yong-li Zheng Jing Kang and Yan-xia Chen |
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| Institution: | Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics,
University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics,
University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics,
University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics,
University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics,
University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | |
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| Keywords: | Hydrogen evolution reaction Au electrode Temperature effect Activation energy Symmetric factor |
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