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題名 | Study on Electrocatalytic Activity of Platinum for Hydrogen Oxidation in Acidic Solution by Scanning Electrochemical Microscopy |
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作者姓名(中文) | 尹月華; 牛林; 曹小麗; | 書刊名 | Journal of the Chinese Chemical Society |
卷期 | 56:6 2009.12[民98.12] |
頁次 | 頁1092-1098 |
分類號 | 343.38 |
關鍵詞 | Electrocatalytic activity; Hydrogen oxidation reaction; Scanning electrochemical microscopy; SECM; Platinum; Microelectrode; |
語文 | 英文(English) |
英文摘要 | The electrocatalytic activity of platinum for hydrogen oxidation in 0.01MH2SO4 + 0.1MNa2SO4 solution has been investigated by scanning electrochemical microscopy (SECM) technique. The cyclic voltammogram (CV), approach curve, area scan imaging and chronoamperometric methods have been used. The results indicate that the imaging capability of the SECM feedback mode can be used more efficiently to visually identify materials’ electrocatalytic activity, compared with the approach curve method for identification of the conductive or insulating nature of a surface. The SECM imaging method has demonstrated the effects of Pt substrate potential on the electrocatalytic oxidation of hydrogen under a constant tip potential. It is found that themore positive the Pt substrate potential, the lower the electrocatalytic activity of the Pt. Furthermore, the chronoamperometric results support the variation of the electrocatalytic activity with the Pt substrate potential as well. |
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