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Plasma‐Engraved Co3O4 Nanosheets with Oxygen Vacancies and High Surface Area for the Oxygen Evolution Reaction
Abstract
Co 3 O 4, which is of mixed valences Co 2+ and Co 3+, has been extensively investigated as an efficient electrocatalyst for the oxygen evolution reaction (OER). The proper control of Co 2+/Co 3+ ratio in Co 3 O 4 could lead to modifications on its electronic and thus catalytic properties. Herein, we designed an efficient Co 3 O 4‐based OER electrocatalyst by a plasma‐engraving strategy, which not only produced higher surface area, but also generated oxygen vacancies on Co 3 O 4 surface with more Co 2+ formed. The increased surface area ensures the Co 3 O 4 has more sites for OER, and generated oxygen vacancies on Co 3 O 4 surface improve the electronic conductivity and create more active defects for OER. Compared to pristine Co 3 O 4, the engraved Co 3 O 4 exhibits a much higher current density and a lower onset potential. The specific activity of the plasma‐engraved Co 3 O 4 nanosheets (0.055 mA cm−2BET at 1.6 V) is 10 times higher than that of pristine Co 3 O 4, which is contributed by the surface oxygen vacancies.
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Metadata
- Authors
- Xu, L., Jiang, Q., Xiao, Z., Li, X., Huo, J., Wang, S., & Dai, L.
- Venue
- Angewandte Chemie
- Publisher
- Wiley
- Published
- 2016-03-17
- Volume
- 128
- Issue
- 17
- Pages
- 5363-5367
- ISSN
- 0044-8249 (ISSN-L)
- 1521-3757
- OpenAlex
- W4230533550
- Cited by
- 592
- References
- 0
- FWCI
- 19.31
- Type
- journal article
- Language
- en
- Open access
- closed
- Funders
- National Natural Science Foundation of China (51402100, 21573066)
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- Xu, L., Jiang, Q., Xiao, Z., Li, X., Huo, J., Wang, S., & Dai, L. (2016). Plasma‐Engraved Co3O4 Nanosheets with Oxygen Vacancies and High Surface Area for the Oxygen Evolution Reaction. Angewandte Chemie. https://doi.org/10.1002/ange.201600687
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