Synergistic effect between Pt0 and Bi2O3−x for efficient room-temperature alcohol oxidation under base-free aqueous conditions†
Juanjuan
Liu, 
*ab
Jie
Fan
*b
*ab
Jie
Fan
*b
Abstract
Novel Pt/Bi2O3−x catalysts synthesized by reduction of Pt/Bi2O3 in an H2 atmosphere at 300 °C were found to be efficient (conversion of 94.1 ± 2.7%, selectivity to aldehyde >99%) for benzyl alcohol oxidation to benzaldehyde at room temperature (26 °C) under base-free aqueous conditions. The catalytic oxidation is a green-chemistry compatible process with atmospheric O2 as the oxidant at ambient pressure. The high catalytic activity of Pt/Bi2O3−x is ascribed to the synergistic effect between Pt0 and nearby partially reduced Bi2O3−x species. Pt0 acts as a site to cleave the α-C–H bond of alcohols while Bi2O3−x could facilitate the activation of oxygen.
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