Green catalytic oxidation of benzyl alcohol over Pt/ZnO in base-free aqueous medium at room temperature

doi:10.1016/S1872-2067(18)63022-0

Abstract

Abstract:

The selective oxidation of alcohol using molecular oxygen as an oxidant and water as a green solvent is of great interest in green chemistry. In this work, we present a systematic study of a Pt/ZnO catalyst for the selective oxidation of benzyl alcohol at room temperature under base-free aqueous conditions. Experimental observations and density functional theory calculations suggest that ZnO as a support can facilitate the adsorption of benzyl alcohol, which subsequently reacts with the activated oxygen species on the Pt catalyst, producing benzaldehyde. The resulting solid achieves a high conversion (94.1 ±5.1% in 10 h) of benzyl alcohol and nearly 100% selectivity to benzaldehyde with ambient air as the oxidant. In addition, by introducing a small amount of Bi (1.78 wt%) into Pt/ZnO, we can further enhance the activity by 350%.

Key words: Pt/ZnO, Selective oxidation, Benzyl alcohol, C-H activation, Aqueous medium, Room temperature

Juanjuan Liu, Shihui Zou, Jiachao Wu, Hisayoshi Kobayashi, Hongting Zhao, Jie Fan. Green catalytic oxidation of benzyl alcohol over Pt/ZnO in base-free aqueous medium at room temperature[J]. Chinese Journal of Catalysis, 2018, 39(6): 1081-1089.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(18)63022-0

https://www.cjcatal.com/EN/Y2018/V39/I6/1081

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