Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction of Iron via Electrochemical Methods

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	Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction of Iron via Electrochemical Methods
	Wu, Jiajia1,2 ; Zhang, Da 1,3; Niwa, Hideharu 4,5; Harada, Yoshihisa 4,5; Oshima, Masaharu 5; Ofuchi, Hironori 6; Nabae, Yuta 7; Okajima, Takeyoshi 1; Ohsaka, Takeo 1
刊名	LANGMUIR
	2015-05-19
卷号	31 期号:19 页码:5529-5536
英文摘要	The iron (Fe) electrodeposition-electrochemical dissolution has been employed on nitrogen-doped carbon material (P-PI) prepared via multi-step pyrolysis of a polyimide precursor to achieve the introduction of Fe species, and its influence on the oxygen reduction reaction (ORR) is investigated by cyclic and rotating ring-disk electrode voltammetry in 0.5 M H2SO4. After the electrochemical treatment, the overpotential and H2O2 production percentage of ORR on the P-PI are decreased and the number of electrons transferred is increased in the meanwhile. In combination with the results of X-ray absorption fine structure spectra, the presence of Fe-N-x sites (Fe ions coordinated by nitrogen) is believed to be responsible for the improved ORR performance. Further kinetic analysis indicates that a two-electron reduction of O-2 is predominant on the untreated P-PI with coexistence of a direct four-electron transformation of O-2 to H2O, while the introduction of Fe species leads to a larger increase in the rate constant for the four-electron reduction than that for the two-electron process, being in good agreement with the view that Fe-N-x sites are active for four-electron ORR.
收录类别	SCI
语种	英语
WOS记录号	WOS:000355057500033
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/33040]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
作者单位	1.Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Yokohama, Kanagawa 2268502, Japan 2.Chinese Acad Sci, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Shandong, Peoples R China 3.Shanghai Second Polytech Univ, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China 4.Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan 5.Univ Tokyo, Synchrotron Radiat Res Org, Sayo, Hyogo 6795198, Japan 6.Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan 7.Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Organ & Polymer Mat, Tokyo 1528552, Japan
推荐引用方式 GB/T 7714	Wu, Jiajia,Zhang, Da,Niwa, Hideharu,et al. Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction of Iron via Electrochemical Methods[J]. LANGMUIR,2015,31(19):5529-5536.
APA	Wu, Jiajia.,Zhang, Da.,Niwa, Hideharu.,Harada, Yoshihisa.,Oshima, Masaharu.,...&Ohsaka, Takeo.(2015).Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction of Iron via Electrochemical Methods.LANGMUIR,31(19),5529-5536.
MLA	Wu, Jiajia,et al."Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction of Iron via Electrochemical Methods".LANGMUIR 31.19(2015):5529-5536.