Porous carbon cubes decorated with cobalt nanoparticles for oxygen evolution catalysis in Zn-air batteries
- Authors
- Lee, Gwang-Hee; Yoo, Heewon; Kim, Dong-Wan
- Issue Date
- 4월-2022
- Publisher
- WILEY
- Keywords
- cobalt nanoparticle; oxygen evolution reaction; porous carbon cube; zinc-air battery
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.5, pp.6755 - 6765
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 46
- Number
- 5
- Start Page
- 6755
- End Page
- 6765
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/143214
- DOI
- 10.1002/er.7615
- ISSN
- 0363-907X
- Abstract
- For commercialization of zinc-air batteries, it is important to replace expensive noble metal catalysts with inexpensive carbonaceous materials. Herein, an efficient oxygen evolution reaction (OER) catalyst composed of a unique porous tunnel carbon cube and cobalt nanoparticles (Co@NPCC) was fabricated to facilitate oxygen diffusion and create electron conduction networks. As an OER catalyst for zinc-air batteries (ZABs), the resulting Co@NPCC demonstrate enhanced OER activity, similar to that of the benchmark RuO2. In OER performance, Co@NPCC exhibits the excellent mass activity of 49.9 mA mg(-1) at overpotential (eta) of 0.47 V and the high current density of 91.5 mA cm(-2) at 1.75 V (vs RHE), compared to commercial RuO2 catalysts. The use of Co@NPCC as the OER catalyst for ZAB maintains stable charge overpotential with as little as 0.05 V variation during 250 cycles, which extends the stable discharge-charge cycle performance compared to RuO2. This work highlights a facile approach to fabricate OER catalysts without noble metals for enabling stable charge state and long life ZABs.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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