Abstract
The electrooxidation of ethanol on Au(1 1 1), Au(1 0 0), Au(1 1 0) and Au(2 1 0) single crystal electrodes as well as on Au polycrystalline electrode have been investigated in alkaline media using cyclic voltammetry (CV) and in situ Fourier transform infrared reflectance (FTIR) spectroscopy. It has been found that the catalytic activity for the electrooxidation of ethanol in the low potential region decreases in the following order: Au(1 1 0) > Au(2 1 0) > Au(1 0 0) > Au(poly) > Au(1 1 1). This suggests that the defect sites on the Au surface dominate the electrooxidation of ethanol. On the other hand, both the adsorbed OH and the potential of zero charge on the surface play an important role in the ethanol oxidation reaction. The FTIR spectroscopy measurements show that the main reaction product of ethanol oxidation reaction in the alkaline media is acetate. This result indicates that the reaction product on gold is independent of the electrode's orientation.
| Original language | English |
|---|---|
| Pages (from-to) | 89-94 |
| Number of pages | 6 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 707 |
| DOIs | |
| Publication status | Published - 2013 |
Funding
This work was carried out in collaboration with the National Institute of Materials Science (NIMS), World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics (MANA), Tsukuba, Japan and the Instituto de Electroquímica de la Universidad de Alicante, Spain. S. Beyhan acknowledges for the NIMS-MANA postdoctoral fellowship.
| Funders | Funder number |
|---|---|
| NIMS-MANA |
Keywords
- Alkaline media
- Ethanol electrooxidation
- Gold single crystal electrode
- In situ Fourier transform infrared