A large-scale synthesis of heteroatom (N and S) co-doped hierarchically porous carbon (HPC) derived from polyquaternium for superior oxygen reduction reactivity

A simple, large-scale and green synthetic route is demonstrated for the preparation of polyquaternium derived heteroatom (N and S) co-doped hierarchically porous carbon (HPC). Our protocol allows for the simultaneous optimization of both porous structures and surface functionalities of (N and S) co-...

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Published inGreen chemistry : an international journal and green chemistry resource : GC Vol. 18; no. 9; pp. 2699 - 279
Main Authors Wu, Mingjie, Qiao, Jinli, Li, Kaixi, Zhou, Xuejun, Liu, Yuyu, Zhang, Jiujun
Format Journal Article
LanguageEnglish
Published Royal Society of Chemistry 01.01.2016
Subjects
batteries
Carbon
Catalysts
catalytic activity
cathodes
Current density
durability
electric potential difference
green chemistry
Media
Metal air batteries
methanol
Methyl alcohol
oxygen
Platinum
Zinc-oxygen batteries
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Summary:A simple, large-scale and green synthetic route is demonstrated for the preparation of polyquaternium derived heteroatom (N and S) co-doped hierarchically porous carbon (HPC). Our protocol allows for the simultaneous optimization of both porous structures and surface functionalities of (N and S) co-doped carbon (N-S-HPC). As a result, the obtained N-S-HPC shows a superior catalytic ORR performance to the commercial Pt/C catalyst in alkaline media, including high catalytic activity, remarkable long-term stability and strong methanol tolerance. Even in acidic media where most non-precious metal catalysts are suffered from high overpotential and low durability, our N-S-HPC exhibits an amazing ORR activity with a half-wave potential of 0.73V, and 40% enhanced limited diffusion-current density when compared to Pt/C catalyst. Particularly, when used for constructing a zinc–air battery cathode, such an N-S-HPC catalyst can give a discharge peak power density as high as 536 mW cm-2. At 1.0 V of cell voltage, a current density of 317 mA cm-2 is achieved. This performance is superior to all reported non-precious metal catalysts in literature for zinc–air batteries and significantly outperforms the state-of-the-art platinum-based catalyst.
NRC publication: Yes
Bibliography:10.1039/c5gc02625c
Electronic supplementary information (ESI) available. See DOI
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1463-9262
1463-9270
1463-9270
DOI:10.1039/C5GC02625C