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题名: Insights into the promotion effect of macrocycle molecule on HCOOH electro-oxidation
作者: Tian, L (Tian, Lei) ; Yuan, BF (袁斌芳) ; Li, HY (李浩源) ; Dong, ZZ (Dong, Zhizhi) ; Zhang, ZY (Zhang, Zhiying) ; Zhou, XC (周小春)
通讯作者: Zhang, ZY (Zhang, Zhiying)
关键词: Macrocycle molecule ; Coverage ; Formic acid ; Electro-oxidation ; Platinum ; Adsorption
刊名: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
发表日期: 2014
卷: 734, 期:0, 页:38-42
收录类别: SCI
英文摘要: Macrocycle molecules were found to be highly promotive to HCOOH electro-oxidation on Pt surface since 2007. But it is still not known how the macrocycle molecules induce the promotion effect. The difficulty is that it's very hard to obtain the coverage of macrocycle molecules during the reaction. In this paper, the under-potential deposited hydrogen (UPD-H) is used as the probe to measure the coverage of macrocycle molecules on Pt surface. Subsequently, the kinetics of adsorption and the promotion effect of the macrocycle molecule (copper phthalocyanine-3,4',4 '',4 '' 1'''-tetrasulfonic acid (CuPcTsA)) is systematically studied. We find that the coverage of CuPcTsA increases very fast at the beginning 500 s during the adsorption, and saturates after 1000 s. Usually, the activity of CuPcTsA modified Pt electrode increases with the increasing coverage of CuPcTsA under a certain CuPcTsA concentration during the range 3-25 mu M. But this behavior follows different curves for different CuPcTsA concentrations. The selectivity (direct pathway to CO intermediate pathway) also increases with the increasing coverage. Surprisingly, the selectivity from different CuPcTsA concentrations follows a same curve. The order of the reaction selectivity is similar to 1 and similar to 3 for the CuPcTsA coverage lower and higher than 0.34. The desorption is not a simple reverse process of the adsorption, and has some memory of its initial state, where the desorption starts.
语种: 英语
WOS记录号: WOS:000345805100007
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/1838
Appears in Collections:先进材料研究部_周小春团队_期刊论文

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Recommended Citation:
Tian, L ,Yuan, BF ,Li, HY ,et al. Insights into the promotion effect of macrocycle molecule on HCOOH electro-oxidation[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2014,734(0):38-42.
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