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

Young Jin Ko, Keunsu Choi, Jun Yong Kim, Inho Kim, Doo Seok Jeong, Heon Jin Choi, Hiroshi Mizuseki, Wook Seong Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)31-40
Number of pages10
JournalCarbon
Volume127
DOIs
Publication statusPublished - 2018 Feb

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Onion-like carbon as dopant/modification-free electrocatalyst for [VO]<sup>2+</sup>/[VO<sub>2</sub>]<sup>+</sup> redox reaction: Performance-control mechanism'. Together they form a unique fingerprint.

  • Cite this