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A Directional Synthesis for Topological Defect in Carbon

Journal Article


Abstract


  • Recently, defect electrocatalysis has become a research focus with significant advances. However, the control synthesis of target defects is still challenging to date, which is prerequisite for deeply understanding the intrinsic activity origin of metal-free catalysts. Herein, inspired by the theoretical demonstration, we report a general edge-engineering strategy to fulfill controlling definitive defect configurations in carbons by the direct removal of specific nitrogen (N) doping sites, representing as one-to-one conversion; e.g., graphitic-N to divacancy (C585), pyridinic-N to separate pentagon (S-C5), and pyrrolic-N to adjacent pentagons (A-C5). Electrochemical measurements reveal that A-C5 defects prefer oxygen reduction reaction (ORR) catalysis, whereas C585 defects are more favorable toward hydrogen evolution reaction (HER). This work provides insights into the design of high-performance carbon-based catalysts based on the principles of defect formation.

Publication Date


  • 2020

Published In


Citation


  • Wang, X., Jia, Y., Mao, X., Zhang, L., Liu, D., Song, L., . . . Yao, X. (2020). A Directional Synthesis for Topological Defect in Carbon. Chem, 6(8), 2009-2023. doi:10.1016/j.chempr.2020.05.010

Scopus Eid


  • 2-s2.0-85088875927

Web Of Science Accession Number


Start Page


  • 2009

End Page


  • 2023

Volume


  • 6

Issue


  • 8

Abstract


  • Recently, defect electrocatalysis has become a research focus with significant advances. However, the control synthesis of target defects is still challenging to date, which is prerequisite for deeply understanding the intrinsic activity origin of metal-free catalysts. Herein, inspired by the theoretical demonstration, we report a general edge-engineering strategy to fulfill controlling definitive defect configurations in carbons by the direct removal of specific nitrogen (N) doping sites, representing as one-to-one conversion; e.g., graphitic-N to divacancy (C585), pyridinic-N to separate pentagon (S-C5), and pyrrolic-N to adjacent pentagons (A-C5). Electrochemical measurements reveal that A-C5 defects prefer oxygen reduction reaction (ORR) catalysis, whereas C585 defects are more favorable toward hydrogen evolution reaction (HER). This work provides insights into the design of high-performance carbon-based catalysts based on the principles of defect formation.

Publication Date


  • 2020

Published In


Citation


  • Wang, X., Jia, Y., Mao, X., Zhang, L., Liu, D., Song, L., . . . Yao, X. (2020). A Directional Synthesis for Topological Defect in Carbon. Chem, 6(8), 2009-2023. doi:10.1016/j.chempr.2020.05.010

Scopus Eid


  • 2-s2.0-85088875927

Web Of Science Accession Number


Start Page


  • 2009

End Page


  • 2023

Volume


  • 6

Issue


  • 8