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Electrocatalytic Oxidation of Alcohols on Gold in Alkaline Media: Base or Gold Catalysis?
Abstract
On the basis of a comparison of the oxidation activity of a series of similar alcohols with varying pK(a) on gold electrodes in alkaline solution, we find that the first deprotonation is base catalyzed, and the second deprotonation is fast but gold catalyzed. The base catalysis follows a Hammett-type correlation with pK(a), and dominates overall reactivity for a series of similar alcohols. The high oxidation activity on gold compared to platinum for some of the alcohols is related to the high resistance of gold toward the formation of poisoning surface oxides. These results indicate that base catalysis is the main driver behind the high oxidation activity of many organic fuels on fuel cell anodes in alkaline media, and not the catalyst interaction with hydroxide.
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Cited by
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A General Method to Probe Oxygen Evolution Intermediates at Operating Conditions
Tao, H. B., Xu, Y., Huang, X., Chen, J., Pei, L., Zhang, J., Chen, J. G., & Liu, B. (2019) · Joule · doi:10.1016/j.joule.2019.03.012 · Cited by 587
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Lu, Y., Liu, T., Huang, Y.-C., Zhou, L., Li, Y., Chen, W., Yang, L., Zhou, B., Wu, Y., Kong, Z., et al. (2022) · ACS Catalysis · doi:10.1021/acscatal.2c00174 · Cited by 282
Importance of Acid–Base Equilibrium in Electrocatalytic Oxidation of Formic Acid on Platinum
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Metadata
- Authors
- Kwon, Y., Lai, S. C. S., Rodriguez, P., & Koper, M. T. M.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-04-19
- Volume
- 133
- Issue
- 18
- Pages
- 6914-6917
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2331934152
- Cited by
- 485
- References
- 0
- FWCI
- 12.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kwon, Y., Lai, S. C. S., Rodriguez, P., & Koper, M. T. M. (2011). Electrocatalytic Oxidation of Alcohols on Gold in Alkaline Media: Base or Gold Catalysis? Journal of the American Chemical Society. https://doi.org/10.1021/ja200976j
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