Onion-like Carbon as Dopant/Modification-free Electrocatalyst for [VO]2+/[VO2]+ Redox Reaction: Performance-control Mechanism
슈퍼관리자
2021-05-21
Onion-like Carbon as Dopant/Modification-free Electrocatalyst for [VO]2+/[VO2]+ Redox Reaction: Performance-control Mechanism
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Authors :
Young-Jin Ko, Keunsu Choi, Jun-Yong Kim, Inho Kim, Doo Seok Jeong, Heon-Jin Choi, H. Mizuseki, and Wook-Seong Lee
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Journal :
Carbon
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Vol :
127
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Page :
31-40
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Year :
2018
![](https://csrc.kist.re.kr/data/file/m04_01/thumb-1890265010_Sek6pUy5_25b7db6cc62ef320506c9fc117a369de1a56175f_1440x544.jpg)
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 °C in 1000–2000 °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.