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Title: Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes
Authors: Wu, Zexing
Wang, Jie
Song, Min
Zhao, Guangming
Zhu, Ye
Fu, Gengtao
Liu, Xien
Keywords: Engineering::Chemical engineering
Issue Date: 2018
Source: Wu, Z., Wang, J., Song, M., Zhao, G., Zhu, Y., Fu, G., & Liu, X. (2018). Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes. ACS Applied Materials & Interfaces, 10(30), 25415-25421. doi:10.1021/acsami.8b07207
Journal: ACS Applied Materials & Interfaces
Abstract: Herein, nitrogen-doped carbon coated hollow Co9S8 microtubes (Co9S8@N–C microtubes) are prepared through a facile solvothermal procedure, followed by dopamine polymerization process together with a post-pyrolysis which present excellent electrocatalytic activity for oxygen reduction reaction (ORR). The Co9S8 within the hollow Co9S8@N–C microtubes presents a well-defined single-crystal structure with dominated (022) plane. To obtain desired electrocatalyst, the annealing temperature and the thickness of carbon layer tuned by changing the dopamine concentration are optimized systematically. The electrochemical results demonstrate that the coordination of the N-doped carbon layer, exposed (022) plane, and hollow architecture of Co9S8 microtubes calcined at 700 °C affords outstanding ORR performance to Co9S8@N–C microtubes. The moderate thickness of the carbon layer is crucial for improving ORR activity of Co9S8@N–C microtubes, while increasing or decreasing the thickness would result in activity decrease. More importantly, the N-doped carbon layer can protect inner Co9S8 from undergoing aggregation and dissolution effectively during the ORR, resulting in excellent electrocatalytic stability.
ISSN: 1944-8244
DOI: 10.1021/acsami.8b07207
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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