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Facile synthesis of Co-N4-doped mesoporous carbon for oxygen reduction reaction
Zhao H.4; Su C.1; Hui K.N.2; Huia K.S.4
2017
Source PublicationJournal of the Electrochemical Society
ISSN19457111 00134651
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-doped mesoporous carbon (Co-N-MC) was prepared for the ORR using cobalt-azides as the Co-N-containing precursor, and ordered mesoporous silica SBA-15 as a template for achieving mesoporous structures. The Co-N-MC electrode exhibited remarkable ORR activity in an alkaline medium (a half-wave potential of -0.15 V vs. MMO, only ∼19 mV deviation from the commercial Pt/C catalyst), high selectivity (electron-transfer number ∼4) and excellent electrochemical stability (∼8 mV negative shift of the half-wave potential after 1000 cycles). The good performance of the Co-N-MC electrode was attributed to the synergetic effects of N, C and Co. In particular, the existence of graphitic pores in the Co-N-MC catalyst facilitated the diffusion of O to the catalytic active sites, which benefited the progression of the ORR on the Co-N-MC catalyst.
DOI10.1149/2.1611704jes
URLView the original
Language英語
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Shanxi DaTong DaXue
2.Universidade de Macau
3.Hong Kong University of Science and Technology
4.University of East Anglia
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GB/T 7714
Zhao H.,Su C.,Hui K.N.,et al. Facile synthesis of Co-N4-doped mesoporous carbon for oxygen reduction reaction[J]. Journal of the Electrochemical Society,2017,164(4):F412-F417.
APA Zhao H.,Su C.,Hui K.N.,&Huia K.S..(2017).Facile synthesis of Co-N4-doped mesoporous carbon for oxygen reduction reaction.Journal of the Electrochemical Society,164(4),F412-F417.
MLA Zhao H.,et al."Facile synthesis of Co-N4-doped mesoporous carbon for oxygen reduction reaction".Journal of the Electrochemical Society 164.4(2017):F412-F417.
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