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Onion-like carbon as dopant/modification-free electrocatalyst for [VO](2+)/[VO2](+) redox reaction: Performance-control mechanism

Title
Onion-like carbon as dopant/modification-free electrocatalyst for [VO](2+)/[VO2](+) redox reaction: Performance-control mechanism
Author
정두석
Keywords
Onion-like carbon; Vacancy generation; Inherent tensile strain; Vanadium redox reaction; First-principles calculation
Issue Date
2018-02
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v. 127, page. 31-40
Abstract
We investigate the application of the onion-like carbon (OLC) as an electrocatalyst for [VO](2+)/[VO2](+) redox flow reaction; its performance (electrocatalytic activity and reversibility) strongly increases with the synthesis to peak at 1800 degrees C in 1000-2000 degrees C range. The dopant/modification-free, optimized redox performances of the OLC is comparable to some of the best data in the literature of various types of carbon materials with post-synthesis modifications or doping. Mechanism behind such performance optimization is investigated employing various physical/electrochemical analyses as well as the first-principles calculations. We demonstrate that the carbon dangling bonds or the crystalline defects, generated by an inherent mechanism unique to the OLC, played a pivotal role in determining the electrocatalytic performances.
URI
https://www.sciencedirect.com/science/article/pii/S0008622317310734?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/117687
ISSN
0008-6223; 1873-3891
DOI
10.1016/j.carbon.2017.10.073
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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