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Oxygen Reduction Reaction in a Droplet on Graphite: Direct Evidence that the Edge Is More Active than the Basal Plane
Abstract
Carbon‐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.
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Yang, S., Feng, X., Wang, X., & Müllen, K. (2011) · Angewandte Chemie International Edition · doi:10.1002/anie.201100170 · Cited by 1,109
Cited by
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Dou, S., Tao, L., Huo, J., Wang, S., & Dai, L. (2016) · Energy & Environmental Science · doi:10.1039/c6ee00054a · Cited by 836
Self-citationWu, G., Santandreu, A., Kellogg, W., Gupta, S., Ogoke, O., Zhang, H., Wang, H.-L., & Dai, L. (2016) · Nano Energy · doi:10.1016/j.nanoen.2015.12.032 · Cited by 744
Self-citationCarbon-based electrocatalysts for advanced energy conversion and storage
Zhang, J., Xia, Z., & Dai, L. (2015) · Science Advances · doi:10.1126/sciadv.1500564 · Cited by 735
Self-citationWu, J., Ma, S., Sun, J., Gold, J. I., Tiwary, C., Kim, B., Zhu, L., Chopra, N., Odeh, I. N., Vajtai, R., et al. (2016) · Nature Communications · doi:10.1038/ncomms13869 · Cited by 658
Zhang, J., & Dai, L. (2015) · ACS Catalysis · doi:10.1021/acscatal.5b01563 · Cited by 590
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Metadata
- Authors
- Shen, A., Zou, Y., Wang, Q., Dryfe, R. A. W., Huang, X., Dou, S., Dai, L., & Wang, S.
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2014-08-14
- Volume
- 53
- Issue
- 40
- Pages
- 10804-10808
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2013890318
- Cited by
- 507
- References
- 1
- FWCI
- 10.81
- Type
- journal article
- Language
- en
- Open access
- closed
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- 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. https://doi.org/10.1002/anie.201406695
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