Role of palladium crystallite size on CO oxidation over CeZrO 4-δ supported Pd catalysts
| Title | Role of palladium crystallite size on CO oxidation over CeZrO 4-δ supported Pd catalysts |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Burange, AS, Reddy, KPrabhakr, Gopinath, C, Shukla, R, Tyagi, AK |
| Journal | Journal of Molecular Catalysis |
| Volume | 455 |
| Date Published | AUG |
| Abstract | Photodeposited palladium on nanocrystalline CeZrO 4-δ support was evaluated for CO oxidation, as a function of particle size and pre-treatment. All the catalysts were well characterized by XRD, SEM, EDX, TEM, CO chemi-sorption and Raman spectroscopy. It was observed that change in photodeposition time alters the average crystallite size of Pd, and the same was confirmed by CO chemisorption. 7 nm average crystallite size of Pd exhibited excellent catalytic activity for CO oxidation. In order to understand the effect of support and metal-support interaction, 1 wt% Pd was deposited deliberately onto reduced and oxidized CeZrO 4-δ support. The reduced support with anionic vacancies and more Ce 3+ species exhibited an improvement in CO oxidation at onset temperature. Detailed analysis shows that Pd-deposition occurs preferentially at oxygen-vacancy sites and subsequent metal-support interaction influences the catalysis. |
| DOI | 10.1016/j.mcat.2018.05.021 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 4.211 |
Divison category:
Catalysis and Inorganic Chemistry
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