Surface Structure Dependent Electrocatalytic Activity of Co3O4 Anchored on Graphene Sheets toward Oxygen Reduction Reaction
10.1038/srep02300
Crossref journal-article
Springer Science and Business Media LLC
Scientific Reports (297)
Abstract

AbstractCatalytic activity is primarily a surface phenomenon, however, little is known about Co3O4 nanocrystals in terms of the relationship between the oxygen reduction reaction (ORR) catalytic activity and surface structure, especially when dispersed on a highly conducting support to improve the electrical conductivity and so to enhance the catalytic activity. Herein, we report a controllable synthesis of Co3O4 nanorods (NR), nanocubes (NC) and nano-octahedrons (OC) with the different exposed nanocrystalline surfaces ({110}, {100} and {111}), uniformly anchored on graphene sheets, which has allowed us to investigate the effects of the surface structure on the ORR activity. Results show that the catalytically active sites for ORR should be the surface Co2+ ions, whereas the surface Co3+ ions catalyze CO oxidation and the catalytic ability is closely related to the density of the catalytically active sites. These results underscore the importance of morphological control in the design of highly efficient ORR catalysts.

Bibliography

Xiao, J., Kuang, Q., Yang, S., Xiao, F., Wang, S., & Guo, L. (2013). Surface Structure Dependent Electrocatalytic Activity of Co3O4 Anchored on Graphene Sheets toward Oxygen Reduction Reaction. Scientific Reports, 3(1).

Authors 6
  1. Junwu Xiao (first)
  2. Qin Kuang (additional)
  3. Shihe Yang (additional)
  4. Fei Xiao (additional)
  5. Shuai Wang (additional)
  6. Lin Guo (additional)
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Dates
Type When
Created 12 years, 1 month ago (July 29, 2013, 7:09 a.m.)
Deposited 2 years, 7 months ago (Jan. 6, 2023, 12:24 a.m.)
Indexed 1 week, 5 days ago (Aug. 21, 2025, 1:57 p.m.)
Issued 12 years, 1 month ago (July 29, 2013)
Published 12 years, 1 month ago (July 29, 2013)
Published Online 12 years, 1 month ago (July 29, 2013)
Funders 0

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@article{Xiao_2013, title={Surface Structure Dependent Electrocatalytic Activity of Co3O4 Anchored on Graphene Sheets toward Oxygen Reduction Reaction}, volume={3}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/srep02300}, DOI={10.1038/srep02300}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Xiao, Junwu and Kuang, Qin and Yang, Shihe and Xiao, Fei and Wang, Shuai and Guo, Lin}, year={2013}, month=jul }