Controllable active sites and facile synthesis of cobalt nanoparticle embedded in nitrogen and sulfur co-doped carbon nanotubes as efficient bifunctional electrocatalysts for oxygen reduction and evolution reactions
- Authors
- Oh, Taeseob; Kim, Kwanwoo; Kim, Jooheon
- Issue Date
- Nov-2019
- Publisher
- Elsevier B.V.
- Keywords
- Encapsulated structure; Nitrogen and sulfur co-doping; Nonprecious metal catalyst; Oxygen evolution reaction; Oxygen reduction reaction
- Citation
- Journal of Energy Chemistry, v.38, pp 60 - 67
- Pages
- 8
- Journal Title
- Journal of Energy Chemistry
- Volume
- 38
- Start Page
- 60
- End Page
- 67
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18566
- DOI
- 10.1016/j.jechem.2018.12.021
- ISSN
- 2095-4956
- Abstract
- Development of efficient and promising bifunctional electrocatalysts for oxygen reduction and evolution reactions is desirable. Herein, cobalt nanoparticles embedded in nitrogen and sulfur co-doped carbon nanotubes (Co@NSCNT) were prepared by a facile pyrolytic treatment. The cobalt nanoparticles and co-doping of nitrogen and sulfur can improve the electron donor-acceptor characteristics of the carbon nanotubes and provide more active sites for catalytic oxygen reduction and evolution reactions. The prepared Co@NSCNT, annealed at 900 °C, showed excellent electrocatalytic performance and better durability than commercial platinum catalysts. Additionally, Co@NSCNT-900 catalysts exhibited comparable onset potentials and Tafel slopes to ruthenium oxide. Overall, Co@NSCNT showed high activity and improved durability for both oxygen evolution and reduction reactions. © 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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