Bioethanol selective oxidation to acetaldehyde over Ag-CeO2: role of metal-support interactions

• Published in: New journal of chemistry Vol. 41; no. 7; pp. 2636 - 2641
• Main Authors: Rana, Paresh H, Parikh, Parimal A
• Format: Journal Article
• Language: English
• Published: 07.04.2017
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/c6nj03853k

Bioethanol oxidation was investigated over a Ag/CeO 2 catalyst prepared via a wet impregnation method. The prepared catalyst was fully characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The characterization results indicated that a part of silver was inserted into the lattice of CeO 2 and it expanded the support lattice. The Ag/CeO 2 catalyst was found to outperform the previously reported catalyst systems (acetaldehyde selectivity of 90% and life >36 h) from 200 °C to 350 °C, 5 atm, and gas hourly space velocity of 18 000 mL g cat −1 h −1 . This study provides a path for the selective oxidation of other biomass-derived compounds. Inserted Ag creates oxygen vacancy on the surface of CeO 2 , leading to enhanced catalytic activity.