DOI: 10.1002/anie.201406695. Oxygen Reduction Reaction in a Droplet on Graphite: Direct Evidence that the Edge Is More Active than the Basal Plane

Oxygen Reduction Reaction in a Droplet on Graphite: Direct Evidence that the Edge Is More Active than the Basal Plane

10.1002/anie.201406695

Crossref journal-article

Wiley

Angewandte Chemie International Edition (311)

Abstract

AbstractCarbon‐based metal‐free electrocatalysts for the oxygen reduction reaction (ORR) in alkaline medium have been extensively investigated with the aim of replacing the commercially available, but precious platinum‐based catalysts. For the proper design of carbon‐based metal‐free electrocatalysts for the ORR, it would be interesting to identify the active sites of the electrocatalyst. The ORR was now studied with an air‐saturated electrolyte solution droplet (diameter ca. 15 μm), which was deposited at a specified position either on the edge or on the basal plane of highly oriented pyrolytic graphite. Electrochemical measurements suggest that the edge carbon atoms are more active than the basal‐plane ones for the ORR. This provides a direct way to identify the active sites of carbon materials for the ORR. Ball‐milled graphite and carbon nanotubes with more exposed edges were also prepared and showed significantly enhanced ORR activity. DFT calculations elucidated the mechanism by which the charged edge carbon atoms result in the higher ORR activity.

Bibliography

Shen, A., Zou, Y., Wang, Q., Dryfe, R. A. W., Huang, X., Dou, S., Dai, L., & Wang, S. (2014). Oxygen Reduction Reaction in a Droplet on Graphite: Direct Evidence that the Edge Is More Active than the Basal Plane. Angewandte Chemie International Edition, 53(40), 10804â10808. Portico.

Authors 8

Anli Shen (first)
Yuqin Zou (additional)
Qiang Wang (additional)
Robert A. W. Dryfe (additional)
Xiaobing Huang (additional)
Shuo Dou (additional)
Liming Dai (additional)
Shuangyin Wang (additional)

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Dates

Type	When
Created	11 years ago (Aug. 14, 2014, 5:10 p.m.)
Deposited	1 year, 10 months ago (Oct. 16, 2023, 8:06 a.m.)
Indexed	4 days, 7 hours ago (Aug. 28, 2025, 8:13 a.m.)
Issued	11 years ago (Aug. 14, 2014)
Published	11 years ago (Aug. 14, 2014)
Published Online	11 years ago (Aug. 14, 2014)
Published Print	10 years, 11 months ago (Sept. 26, 2014)

Funders 0

None

BibTeX

@article{Shen_2014, title={Oxygen Reduction Reaction in a Droplet on Graphite: Direct Evidence that the Edge Is More Active than the Basal Plane}, volume={53}, ISSN={1521-3773}, url={http://dx.doi.org/10.1002/anie.201406695}, DOI={10.1002/anie.201406695}, number={40}, journal={Angewandte Chemie International Edition}, publisher={Wiley}, author={Shen, Anli and Zou, Yuqin and Wang, Qiang and Dryfe, Robert A. W. and Huang, Xiaobing and Dou, Shuo and Dai, Liming and Wang, Shuangyin}, year={2014}, month=aug, pages={10804–10808} }

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