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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
Source PublicationELECTROCHIMICA ACTA
Volume214Pages:307-312
SubtypeArticle
AbstractThe 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.
KeywordOxygen Reduction Reaction Fe-containing Nitrogen-doped Carbon Catalyst Durability Test Activity Decay Fe Electrodeposition
DOI10.1016/j.electacta.2016.08.006
Indexed BySCI
Language英语
WOS IDWOS:000383827900033
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/135778
Collection海洋环境腐蚀与与生物污损重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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