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题名:
Development of high-performance cathode catalyst of polypyrrole modified carbon supported CoOOH for direct borohydride fuel cell
作者: He, Y; Zhu, C; Chen, KJ; Wang, J; Qin, HY; Liu, JB; Yan, S; Yang, K; Li, AG
刊名: JOURNAL OF POWER SOURCES
出版日期: 2017
卷号: 339, 页码:13-19
关键词: Polypyrrole modified carbon supported cobalt catalyst ; X-ray photoelectron spectroscopy ; X-ray absorption fine structure ; Oxygen reduction reaction ; Direct borohydride fuel cell
DOI: 10.1016/j.jpowsour.2016.11.021
文章类型: 期刊论文
英文摘要: Polyfiyrrole modified carbon supported CoOOH electrocatalyst (CoOOH-PPy-C) is prepared by impregnation-chemical method, and the catalytic properties for the oxygen reduction reaction (ORR) in alkaline media are investigated. The X-ray diffraction and transmission electron microscopy results confirm the presence of the expected CoOOH. The electrochemical tests show that the CoOOH-PPy-C catalyst exhibits good electrocatalytic activity towards ORR. The direct borohydride fuel cell using CoOOH-PPy-C as the cathode catalyst demonstrates a good stability performance. There is only 4% decrease of the cell voltage after 80-h operation. The ORR occurs an average 4-electron transfer pathway on the CoOOH-PPy-C catalyst. The good catalytic activity towards ORR benefits from the Co-N bond, which is identified by X-ray photoelectron spectroscopy test. X-ray absorption fine structure experiments further show that two nearest O atoms are substituted by two N atoms bonding to Co ion at a distance of 1.64 angstrom. The CoOOH-PPy-C exhibits better electrochemical properties than the Co(OH)(2) counterpart even though the valence state of Co ion is +3 in CoOOH-PPy-C. Those results indicate that the bonding of Co ion with N atoms should be a key issue regardless the valence of Co ion. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000390516000002
ISSN号: 0378-7753
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27295
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
He, Y,Zhu, C,Chen, KJ,et al. Development of high-performance cathode catalyst of polypyrrole modified carbon supported CoOOH for direct borohydride fuel cell[J]. JOURNAL OF POWER SOURCES,2017-01-01,339:13-19.
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