EQCM and in situ FTIR Studies on the Adsorption and Oxidation of 1-Butanol at a Platinum Electrode in Alkaline Media
CHEN Guo-liang1, 2, LIN Heng2, WEN Li1, ZHENG Zi-shan2, ZHOU Jian-zhang1, CHEN Sheng-pei1, LIN Zhong-hua1
1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, China 2. Department of Chemistry, Zhangzhou Normal College, Zhangzhou 363000, China
Abstract：The adsorption and oxidation of 1-butanol in alkaline media on a platinum electrode were investigated mainly by EQCM and in situ FTIR spectroscopy. The experimental results demonstrate that the electrooxidation of 1-butanol is closely relative to solution acidity. Since no chemically adsorbed species, such as CO, were evidenced by in situ FTIR spectroscopy, the adsorption of 1-butanol or its dissociative products on Pt surface is suggested by EQCM and CV data. Only one current peak of 1-butanol oxidation in PGPS was detected at -0.23 V/SCE, which illustrated the disappearance of the second current peak due to Pt electrode passivation in alkaline media. The final product of 1-butanol oxidation is only butyric acid anion under experimental condition. It may therefore be suggested that the main reaction occurring at the electrode is the oxidation of 1-butanol to butyric acid anion. The EQCM studies provide quantitative results of surface mass variation and have shed light on elucidating 1-butanol oxidation.
陈国良1，2,林珩2,文莉1,郑子山2,周建章1,陈声培1,林仲华1. 碱性介质中正丁醇在铂电极上吸附和氧化的电化学原位FTIR反射光谱和EQCM研究[J]. 光谱学与光谱分析, 2006, 26(10): 1829-1832.
CHEN Guo-liang1, 2, LIN Heng2, WEN Li1, ZHENG Zi-shan2, ZHOU Jian-zhang1, CHEN Sheng-pei1, LIN Zhong-hua1. EQCM and in situ FTIR Studies on the Adsorption and Oxidation of 1-Butanol at a Platinum Electrode in Alkaline Media. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1829-1832.
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