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Single and Multiple Doping in Graphene Quantum Dots: Unraveling the Origin of Selectivity in the Oxygen Reduction Reaction
Open accessAbstract
Singly and multiply doped graphene oxide quantum dots have been synthesized by a simple electrochemical method using water as solvent. The obtained materials have been characterized by photoemission spectroscopy and scanning tunneling microscopy, in order to get a detailed picture of their chemical and structural properties. The electrochemical activity toward the oxygen reduction reaction of the doped graphene oxide quantum dots has been investigated by cyclic voltammetry and rotating disk electrode measurements, showing a clear decrease of the overpotential as a function of the dopant according to the sequence: N ∼ B > B,N. Moreover, assisted by density functional calculations of the Gibbs free energy associated with every electron transfer, we demonstrate that the selectivity of the reaction is controlled by the oxidation states of the dopants: as-prepared graphene oxide quantum dots follow a two-electron reduction path that leads to the formation of hydrogen peroxide, whereas after the reduction with NaBH 4, the same materials favor a four-electron reduction of oxygen to water.
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Cites
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode
Nørskov, J. K., Rossmeisl, J., Logadottir, A., Lindqvist, L., Kitchin, J. R., Bligaard, T., & Jónsson, H. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp047349j · Cited by 13,153
Wang, H., Maiyalagan, T., & Wang, X. (2012) · ACS Catalysis · doi:10.1021/cs200652y · Cited by 3,618
Cited by
Graphene-based nanomaterials for drug and/or gene delivery, bioimaging, and tissue engineering
Zhao, H., Ding, R., Zhao, X., Li, Y., Qu, L., Pei, H., Yildirimer, L., Wu, Z., & Zhang, W. (2017) · Drug Discovery Today · doi:10.1016/j.drudis.2017.04.002 · Cited by 336
Perini, L., Durante, C., Favaro, M., Perazzolo, V., Agnoli, S., Schneider, O., Granozzi, G., & Gennaro, A. (2015) · ACS Applied Materials & Interfaces · doi:10.1021/am506916y · Cited by 170
Self-citationChen, B., Ma, G., Zhu, Y., Wang, J., Xiong, W., & Xia, Y. (2016) · Journal of Power Sources · doi:10.1016/j.jpowsour.2016.10.022 · Cited by 77
Graphite carbon nitride/boron-doped graphene hybrid for efficient hydrogen generation reaction
Yang, L., Wang, X., Wang, J., Cui, G., & Liu, D. (2018) · Nanotechnology · doi:10.1088/1361-6528/aac9ae · Cited by 32
Metadata
- Authors
- Favaro, M., Ferrighi, L., Fazio, G., Colazzo, L., Di Valentin, C., Durante, C., Sedona, F., Gennaro, A., Agnoli, S., & Granozzi, G.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-11-25
- Volume
- 5
- Issue
- 1
- Pages
- 129-144
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2325126315
- Cited by
- 197
- References
- 2
- FWCI
- 7.31
- Type
- journal article
- Language
- en
- Open access
- green
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- Favaro, M., Ferrighi, L., Fazio, G., Colazzo, L., Di Valentin, C., Durante, C., Sedona, F., Gennaro, A., Agnoli, S., & Granozzi, G. (2015). Single and Multiple Doping in Graphene Quantum Dots: Unraveling the Origin of Selectivity in the Oxygen Reduction Reaction. ACS Catalysis. https://doi.org/10.1021/cs501211h
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