Abstract
An in situ DRIFTS study of ethanol adsorption and desorption was performed on Pt (Rh, Pd) supported on Al2O3 and Ca-Al 2O3. Different from the well-known acetate-intermediate reaction mechanism observed on Al2O3-supported metal catalysts, formate species are exclusively observed on Pt (Rh, Pd) supported on Ca-Al2O3, offering a new mechanism denoted as the formate-intermediate mechanism. The key factor in determining the change in mechanism is the reduced availability of surface oxygen and the enhanced C-C breaking ability of the metal catalyst upon Ca modification. The formate-intermediate mechanism is favored in the presence of noble metals in the following order: Pt > Rh > Pd.
Original language | English |
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Pages (from-to) | 2359-2363 |
Number of pages | 5 |
Journal | ACS Catalysis |
Volume | 4 |
Issue number | 7 |
DOIs | |
State | Published - 3 Jul 2014 |
Externally published | Yes |
Keywords
- Ca
- Pd
- Pt
- Rh
- acetate
- ethanol steam reforming
- formate
- reaction pathway