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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, Da1,3; Niwa, Hideharu4,5; Harada, Yoshihisa4,5; Oshima, Masaharu5; Ofuchi, Hironori6; Nabae, Yuta7; Okajima, Takeyoshi1; Ohsaka, Takeo1
2015-05-19
Source PublicationLANGMUIR
Volume31Issue:19Pages:5529-5536
SubtypeArticle
AbstractThe 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.
DOI10.1021/acs.langmuir.5b00310
Indexed BySCI
Language英语
WOS IDWOS:000355057500033
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/33040
Collection海洋环境腐蚀与与生物污损重点实验室
Affiliation1.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
Recommended Citation
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.
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