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Electro-Oxidation of Ethanol on Pt, Rh, and PtRh Electrodes. A Study Using DEMS and in-Situ FTIR Techniques
Abstract
The electrochemical oxidation of ethanol on platinum, rhodium, and platinum−rhodium electrodes is studied using on-line differential electrochemical mass spectrometry (DEMS) and in-situ infrared spectroscopy (FTIR). The data were normalized using the oxidation of a CO monolayer in order to compare the activity of the different electrodes. Three products have been detected, namely CO 2 and acetaldehyde (detected by DEMS) and acetic acid (detected by in-situ FTIR, since acetic acid is not volatile enough to be detected by DEMS). It is found that rhodium is the far less active electrocatalyst for ethanol electrochemical oxidation. Pure platinum and Pt 90 Rh 10 present similar overall normalized current density, but Pt 90 Rh 10 presents a better CO 2 yield than pure platinum. The best CO 2 yield is found for the Pt 73 Rh 27 electrodes. The acetaldehyde yield decreases as rhodium is added to the electrode. The ratio CO 2 /CH 3 CH 2 O increases when rhodium is added to the electrode. The possible reasons for the different reactivity for the studied electrodes is discussed in terms of C−H bond activation and C−O bond coupling on the different surfaces.
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Cited by
A Lattice‐Oxygen‐Involved Reaction Pathway to Boost Urea Oxidation
Zhang, L., Wang, L., Lin, H., Liu, Y., Ye, J., Wen, Y., Chen, A., Wang, L., Ni, F., Zhou, Z., et al. (2019) · Angewandte Chemie International Edition · doi:10.1002/anie.201909832 · Cited by 336
Huang, L., Sun, J.-Y., Cao, S.-H., Zhan, M., Ni, Z.-R., Sun, H.-J., Chen, Z., Zhou, Z.-Y., Sorte, E. G., Tong, Y. J., et al. (2016) · ACS Catalysis · doi:10.1021/acscatal.6b02097 · Cited by 176
Design of Noble Metal Electrocatalysts on an Atomic Level
Chao, T., Hu, Y., Hong, X., & Li, Y. (2019) · ChemElectroChem · doi:10.1002/celc.201801189 · Cited by 62
Gomes, J., Profeti, D., & Deiner, L. J. (2014) · ChemElectroChem · doi:10.1002/celc.201300060 · Cited by 16
Metadata
- Authors
- de Souza, J. P. I., Queiroz, S. L., Bergamaski, K., Gonzalez, E. R., & Nart, F. C.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-08-31
- Volume
- 106
- Issue
- 38
- Pages
- 9825-9830
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2066774147
- Cited by
- 390
- References
- 0
- FWCI
- 6.15
- Type
- journal article
- Language
- en
- Open access
- closed
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