Onion-like carbon as dopant/modification-free electrocatalyst for [VO](2+)/[VO2](+) redox reaction: Performance-control mechanismOnion-like carbon as dopant/modification-free electrocatalyst for [VO]2+/[VO2]+ redox reaction: Performance-control mechanism
- Other Titles
- Onion-like carbon as dopant/modification-free electrocatalyst for [VO]2+/[VO2]+ redox reaction: Performance-control mechanism
- Authors
- Ko, Young-Jin; Chio, Keunsu; Kim, Jun-Yong; Kim, Inho; Jeong, Doo Seok; Choi, Heon-Jin; Mizuseki, Hiroshi; Lee, Wook-Seong
- Issue Date
- Feb-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Onion-like carbon; Vacancy generation; Inherent tensile strain; Vanadium redox reaction; First-principles calculation
- Citation
- CARBON, v.127, pp.31 - 40
- Indexed
- SCIE
SCOPUS
- Journal Title
- CARBON
- Volume
- 127
- Start Page
- 31
- End Page
- 40
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/17760
- DOI
- 10.1016/j.carbon.2017.10.073
- ISSN
- 0008-6223
- 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.
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