| 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 Publication | JOURNAL OF THE ELECTROCHEMICAL SOCIETY
 |
| ISSN | 0013-4651 |
| Volume | 164Issue:4Pages:F412-F417 |
| Abstract | The 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. |
| DOI | 10.1149/2.1611704jes |
| URL | View the original |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Electrochemistry ; Materials Science |
| WOS Subject | Electrochemistry ; Materials Science, Coatings & Films |
| WOS ID | WOS:000400958600152 |
| Publisher | ELECTROCHEMICAL SOC INC |
| The Source to Article | WOS |
| Fulltext Access | |
| Citation statistics | |
| Document Type | Journal article |
| Collection | University 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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