| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 39032 | Applied Catalysis A: General | 2016 | 6 Pages |
•SiO2 supported trimetalic Rh-Fe-Ce catalysts were used for ethanol synthesis.•Different impregnation methods were used for the catalyst preparation.•Ce improved the ethanol selectivity of Rh-Fe/SiO2 catalyst.•The improvement extents depended on the catalyst preparation methods.•The Rh-Ce interface is conducive to synthesize ethanol.
Ce-promoted Rh-Fe/SiO2 catalysts were prepared using different impregnation methods and evaluated in syngas conversion to ethanol. The catalyst prepared by co-impregnation method (Rh-Fe-Ce/SiO2) showed higher ethanol selectivity than those prepared by sequential impregnation methods (Ce/Rh-Fe/SiO2 and Rh-Fe/Ce/SiO2). Characterization results indicated that when Ce was co-impregnated with Rh and Fe, it had higher dispersion and inhibited the reduction of Rh oxides. Additionally, the reduction of CeO2 was promoted. The Rh-Fe-Ce/SiO2 catalyst exhibited the highest spatial association between Rh and Ce, which was responsible for the highest ethanol selectivity.
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