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Cited by 336

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Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Wu, Liheng, Li, Qing, Wu, Cheng Hao, Zhu, Huiyuan, Mendoza-Garcia, Adriana, Shen, Bo, Guo, Jinghua, Sun, Shouheng·2015·Journal of the American Chemical Society

Abstract

Monodisperse cobalt (Co) nanoparticles (NPs) were synthesized and stabilized against oxidation via reductive annealing at 600 °C. The stable Co NPs are active for catalyzing the oxygen evolution reaction (OER) in 0.1 M KOH, producing a current density of 10 mA/cm(2) at an overpotential of 0.39 V (1.62 V vs RHE, no iR-correction). Their catalysis is superior to the commercial Ir catalyst in both activity and stability. These Co NPs are also assembled into a monolayer array on the working electrode, allowing the detailed study of their intrinsic OER activity. The Co NPs in the monolayer array show 15 times higher turnover frequency (2.13 s(-1)) and mass activity (1949 A/g) than the NPs deposited on conventional carbon black (0.14 s(-1) and 126 A/g, respectively) at an overpotential of 0.4 V. These stable Co NPs are a promising new class of noble-metal-free catalyst for water splitting.

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Metadata

Authors
Wu, L., Li, Q., Wu, C. H., Zhu, H., Mendoza-Garcia, A., Shen, B., Guo, J., & Sun, S.
Venue
Journal of the American Chemical Society
Published
2015-06-01
Volume
137
Issue
22
Pages
7071-7074
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W754403829
Cited by
336
References
3
FWCI
16.32
Type
journal article
Language
en
Open access
closed

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Wu, L., Li, Q., Wu, C. H., Zhu, H., Mendoza-Garcia, A., Shen, B., Guo, J., & Sun, S. (2015). Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.5b04142

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