| 乙二醇在Pt及其Sb, S修饰电极上的吸附氧化过程 |
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| 引用本文： | 陈国良,林珩,林进妹,林洵,许振芳,朱则善. 乙二醇在Pt及其Sb, S修饰电极上的吸附氧化过程[J]. 福建师范大学学报(自然科学版), 2002, 18(1): 46-50,71 |
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| 作者姓名： | 陈国良 林珩 林进妹 林洵 许振芳 朱则善 |
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| 作者单位： | 1. 漳州师范学院化学系,福建,漳州,363000
2. 福建师范大学化学系,福建,福州,350007 |
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| 基金项目： | 福建省教育厅科研基金资助项目(K2001101),漳州师范学院科研基金资助项目(SK007,SK014). |
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| 摘 要： | 研究了0.1 mol L -1 H2SO4中乙二醇在Pt电极和以吸附原子修饰的Pt (Pt/Sbad和Pt/Sad)电极上的吸附和氧化过程. 结果表明, 乙二醇的氧化与电极表面氧物种有着极其密切的关系. Pt电极表面Sb吸附原子能在较低的电位下吸附氧,可显著提高乙二醇电催化氧化活性. 与Pt电极相比较, Sb吸附原子修饰的Pt电极使乙二醇氧化峰电位负移了0.20 V, 峰电流增加了近3 倍. 相反,Pt电极表面S吸附原子的氧化会消耗表面氧物种,几乎完全抑制了乙二醇的电氧化.
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| 关 键 词： | 电化学 石英晶体微天平 Pt电极 修饰电极 乙二醇 电化学吸附 电催化氧化 铂电极 锑 硫 |
| 文章编号： | 1000-5277(2002)01-0046-05 |
Adsorption and Oxidation of Ethylene Glycol on Pt and Sb, S Modified Pt Electrodes |
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| CHEN Guo liang ,LIN Heng ,LIN Jin mei ,LIN Xun ,XU Zhen fang ,ZHU Ze shan. Adsorption and Oxidation of Ethylene Glycol on Pt and Sb, S Modified Pt Electrodes[J]. Journal of Fujian Teachers University(Natural Science), 2002, 18(1): 46-50,71 |
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| Authors: | CHEN Guo liang LIN Heng LIN Jin mei LIN Xun XU Zhen fang ZHU Ze shan |
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| Affiliation: | CHEN Guo liang 1,LIN Heng 1,LIN Jin mei 1,LIN Xun 1,XU Zhen fang 1,ZHU Ze shan 2 |
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| Abstract: | The processes of adsorption and oxidation of ethylene glycol on Pt, Pt/Sb ad and Pt/S ad electrodes were studied. The results demonstrated that the oxidation of ethylene glycol depends strongly on oxidation states of electrode surface. Sb adatoms on Pt surface can adsorb oxygen at relatively low potentials, and exhibit catalytic effects for ethylene glycol oxidation. In contrast to Pt electrodes, the oxidation peak potential of ethylene glycol in this case negatively shifted to about 204 mV with peak current being triple increased. In a contrary, the oxidation of S adatoms consumes oxygen species of Pt electrode surface. As a consequence, the oxidation of ethylene glycol was inhibited by the presence of S ad . The EQCM studies provided quantitative results of surface mass variation during ethylene glycol oxidation, and have thrown new light in elucidating different effects of adatoms Sb ad and S ad on Pt electrode surface towards ethylene glycol oxidation. |
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| Keywords: | EQCM Pt electrode modified electrode ethylene glycol adsorption oxidation |
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