Fig. 1 Catalytic performance of Pd/Al2O3 catalysts with different particle sizes in aerobic oxidation of benzyl alcohol. Catalytic performance of Pd/Al2O3.

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Fig. 1 Catalytic performance of Pd/Al2O3 catalysts with different particle sizes in aerobic oxidation of benzyl alcohol. Catalytic performance of Pd/Al2O3 catalysts with different particle sizes in aerobic oxidation of benzyl alcohol. (A) Benzaldehyde and toluene selectivity as a function of Pd particle size at 50% benzyl alcohol conversion. (B) TOFs as a function of Pd particle size. The inset in (B) shows the specific rates as a function of Pd particle size. The selectivity and TOF of the 4.2-nm Pd/Al2O3 catalyst with 10 cycles of ALD alumina overcoat (10Al2O3-Pd) under the same reaction conditions were also presented in (A) and (B), respectively, for comparison (star). Reaction conditions: normalized Pd content, 1.6 μmol Pd; substrate, 48 mmol benzyl alcohol; reaction temperature, 120°C; O2 flow rate, 15 ml/min. Hengwei Wang et al. Sci Adv 2019;5:eaat6413 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).