UM
Facile Synthesis of Co-N-4-Doped Mesoporous Carbon for Oxygen Reduction Reaction
Zhao, Hong; Su, Caina; Hui, K. N.; Hui, K. S.
2017
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
Volume164Issue:4Pages:F412-F417
AbstractThe oxygen reduction reaction (ORR) is a critical factor in fuel cells that has attracted significant research attention. Non-precious metal catalysts have improved the ORR activity considerably, but they still exhibit poorer ORR performance than commercial Pt-based catalysts. In this study, Co-N-4-doped mesoporous carbon (Co-N-4-MC) was prepared for the ORR using cobalt-azides as the Co-N-4-containing precursor, and ordered mesoporous silica SBA-15 as a template for achieving mesoporous structures. The Co-N-4-MC electrode exhibited remarkable ORR activity in an alkaline medium (a half-wave potential of -0.15 V vs. MMO, only similar to 19 mV deviation from the commercial Pt/C catalyst), high selectivity (electron-transfer number similar to 4) and excellent electrochemical stability (similar to 8 mV negative shift of the half-wave potential after 1000 cycles). The good performance of the Co-N-4- MC electrode was attributed to the synergetic effects of N-4, C and Co. In particular, the existence of graphitic pores in the Co-N-4-MC catalyst facilitated the diffusion of O-2 to the catalytic active sites, which benefited the progression of the ORR on the Co-N-4-MC catalyst. (C) 2017 The Electrochemical Society.
DOI10.1149/2.1611704jes
URLView the original
Indexed BySCI
Language英语
WOS Research AreaElectrochemistry ; Materials Science
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
WOS IDWOS:000400958600152
PublisherELECTROCHEMICAL SOC INC
The Source to ArticleWOS
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Cited Times [WOS]:6   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Zhao, Hong,Su, Caina,Hui, K. N.,et al. Facile Synthesis of Co-N-4-Doped Mesoporous Carbon for Oxygen Reduction Reaction[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2017,164(4):F412-F417.
APA Zhao, Hong,Su, Caina,Hui, K. N.,&Hui, K. S..(2017).Facile Synthesis of Co-N-4-Doped Mesoporous Carbon for Oxygen Reduction Reaction.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164(4),F412-F417.
MLA Zhao, Hong,et al."Facile Synthesis of Co-N-4-Doped Mesoporous Carbon for Oxygen Reduction Reaction".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 164.4(2017):F412-F417.
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