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Electrochemical deposition and dissolution of Fe species for N-doped carbon to understand the degradation mechanism of Pt-free oxygen reduction catalysts
Wu, Jiajia1,2; Nabae, Yuta3; Muthukrishnan, Azhagumuthu3; Ohsaka, Takeo2
2016-10-01
发表期刊ELECTROCHIMICA ACTA
卷号214页码:307-312
文章类型Article
摘要The enhancement in oxygen reduction reaction (ORR) activity is achieved by the introduction of Fe species via the Fe electrochemical deposition-dissolution treatment into a metal-free nitrogen-doped carbon (P-PI) catalyst, which is prepared by the pyrolysis of polyimide fine particles. The thus-obtained Fe-containing P-PI catalyst suffers activity decay during the durability test, evidenced by the negative shift of half-wave potential, the decrease in limiting current density, the number of electrons transferred, and the ratio of the rate constant for 4-electron ORR to that for 2-electron process, and the increase in H2O2 production percentage. The decayed ORR activity can be recovered by another Fe electrochemical deposition-dissolution treatment, demonstrating the predominant role of Fe leaching in activity degradation as well as the effectiveness of the electrochemical treatment in activity restoration. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Oxygen Reduction Reaction Fe-containing Nitrogen-doped Carbon Catalyst Durability Test Activity Decay Fe Electrodeposition
DOI10.1016/j.electacta.2016.08.006
收录类别SCI
语种英语
WOS记录号WOS:000383827900033
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/135778
专题海洋腐蚀与防护研究发展中心
作者单位1.Chinese Acad Sci, Key Lab Marine Environm Corros & Biofouling, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, G1-5,4259 Nagatsuta, Yokohama, Kanagawa 2268502, Japan
3.Tokyo Inst Technol, Dept Mat Sci & Engn, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan
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Wu, Jiajia,Nabae, Yuta,Muthukrishnan, Azhagumuthu,et al. Electrochemical deposition and dissolution of Fe species for N-doped carbon to understand the degradation mechanism of Pt-free oxygen reduction catalysts[J]. ELECTROCHIMICA ACTA,2016,214:307-312.
APA Wu, Jiajia,Nabae, Yuta,Muthukrishnan, Azhagumuthu,&Ohsaka, Takeo.(2016).Electrochemical deposition and dissolution of Fe species for N-doped carbon to understand the degradation mechanism of Pt-free oxygen reduction catalysts.ELECTROCHIMICA ACTA,214,307-312.
MLA Wu, Jiajia,et al."Electrochemical deposition and dissolution of Fe species for N-doped carbon to understand the degradation mechanism of Pt-free oxygen reduction catalysts".ELECTROCHIMICA ACTA 214(2016):307-312.
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