期刊
NANOMATERIALS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/nano12030381
关键词
single-atom catalysts; ORR; OER; electrocatalysis; zinc-air battery; xerogel
类别
资金
- National Natural Science Foundation of China [51872128]
- Natural Science Foundation for Young Scholars of Jiangsu Province [BK20210744]
- Young Talent Support Fund from Jiangsu University [4111310027]
A facile silica xerogel strategy was designed to synthesize uniformly dispersed and dense Co-N-x active sites, improving the performance of bifunctional catalysts.
The N-doped cobalt-based (Co) bifunctional single atom catalyst (SAC) has emerged as one of the most promising candidates to substitute noble metal-based catalysts for highly efficient bifunctionality. Herein, a facile silica xerogel strategy is elaborately designed to synthesize uniformly dispersed and dense Co-N-x active sites on N-doped highly porous carbon networks (Co-N-C SAC) using economic biomass materials. This strategy promotes the generation of massive mesopores and micropores for substantially improving the formation of Co-N-x moieties and unique network architecture. The Co-N-C SAC electrocatalysts exhibit an excellent bifunctional activity with a potential gap (Delta E) of 0.81 V in alkaline medias, outperforming those of the most highly active bifunctional electrocatalysts. On top of that, Co-N-C SAC also possesses outstanding performance in ZABs with superior power density/specific capacity. This proposed synthetic method will provide a new inspiration for fabricating various high-content SACs for varied applications.
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