01570nas a2200169   4500008004100000245009400041210007000135260000800205490000800213520093500221100002301156700002801179700002601207700001901233700002101252856012701273       2018                        eng d00aRole of palladium crystallite size on CO oxidation over CeZrO 4-δ supported Pd catalysts0 aRole of palladium crystallite size on CO oxidation over CeZrO 4δ  cAUG0 v4553 aPhotodeposited 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.1 aBurange, Anand, S.1 aReddy, Kasala, Prabhakr1 aGopinath, Chinnakonda1 aShukla, Rakesh1 aTyagi, Avesh, K.  uhttps://library.ncl.res.in/content/role-palladium-crystallite-size-co-oxidation-over-cezro-4-%CE%B4-supported-pd-catalysts