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Effects of Intrinsic Pentagon Defects on Electrochemical Reactivity of Carbon Nanomaterials
Author(s) -
Zhu Jiawei,
Huang Yupeng,
Mei Wencen,
Zhao Chenyang,
Zhang Chengtian,
Zhang Jian,
Amiinu Ibrahim Saana,
Mu Shichun
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201813805
Subject(s) - nanomaterials , fullerene , nanotechnology , electrochemistry , carbon fibers , materials science , carbon nanotube , capacitance , reactivity (psychology) , pentagon , chemical engineering , chemistry , electrode , organic chemistry , composite material , medicine , alternative medicine , pathology , composite number , political science , law , engineering
Theoretical calculations reveal that intrinsic pentagons in the basal plane can contribute to the local electronic redistribution and the contraction of band gap, making the carbon matrix possess superior binding affinity and electrochemical reactivity. To experimentally verify this, a pentagon‐defect‐rich carbon nanomaterial was constructed by means of in situ etching of fullerene molecules (C 60 ). The electrochemical tests show that, relative to hexagons, such a carbon‐based material with abundant intrinsic pentagon defects makes much greater contribution to the electrocatalytic oxygen reduction activity and electric double layer capacitance. It shows a four‐electron‐reaction mechanism similar to commercial Pt/C and other transition‐metal‐based catalysts, and a higher specific capacitance than many reported metal‐free carbon materials. These results show the influence of intrinsic pentagon defects for developing carbon‐based nanomaterials toward energy conversion and storage devices.