期刊
ELECTROCHIMICA ACTA
卷 362, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.137225
关键词
Nitrogen-doped porous carbons; Structural defects; Supermicroporosity; Metal-free electrocatalyst; Oxygen reduction reaction
资金
- National Natural Science Foundation of China [22005192, 21573150, 21978052]
- Natural Science Foundation of Zhejiang Province [LQ18E030001]
A nitrogen and defect co-doped carbonaceous electrocatalyst with uniform supermicroporous architecture toward oxygen reduction reaction (ORR) was successfully synthesized by using zinc gluconate as an intramolecular defect formation agent. The resultant novel electrocatalysts possess two kinds of active sites (nitrogen and defects) and facilitate the catalytic species to approach the three phase interfaces, which accelerate the breaking of oxygen bonds and effectively prevent the active sites from protonation. Owing to the synergistic effects of nitrogen-doping and topological defects, the supermicroporous structure enriched metal-free catalyst exhibits a superior ORR activity with a half-wave potential up to 0.89 V (vs. RHE) in 0.1 M KOH and 0.77 V (vs. RHE) in 0.1 M HClO4, which has tremendous application potentials in metal-air batteries and proton exchange membrane fuel cells. (C) 2020 Elsevier Ltd. All rights reserved.
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