Results
Title

Solid Base Bi<sub>24</sub>O<sub>31</sub>Br<sub>10</sub>(OH)<sub>δ</sub> with Active Lattice Oxygen for the Efficient Photo‐Oxidation of Primary Alcohols to Aldehydes.

Authors

Dai, Yitao; Ren, Pengju; Li, Yaru; Lv, Dongdong; Shen, Yanbin; Li, Yongwang; Niemantsverdriet, Hans; Besenbacher, Flemming; Xiang, Hongwei; Hao, Weichang; Lock, Nina; Wen, Xiaodong; Lewis, James P.; Su, Ren

Abstract

The selective oxidation of primary alcohols to aldehydes by O2 instead of stoichiometric oxidants (for example, MnVII, CrVI, and OsIV) is an important but challenging process. Most heterogeneous catalytic systems (thermal and photocatalysis) require noble metals or harsh reaction conditions. Here we show that the Bi24O31Br10(OH)δ photocatalyst is very efficient in the selective oxidation of a series of aliphatic (carbon chain from C1 to C10) and aromatic alcohols to their corresponding aldehydes/ketones under visible‐light irradiation in air at room temperature, which would be challenging for conventional thermal and light‐driven processes. High quantum efficiencies (71 % and 55 % under 410 and 450 nm irradiation) are reached in a representative reaction, the oxidation of isopropanol. We propose that the outstanding performance of the Bi24O31Br10(OH)δ photocatalyst is associated with basic surface sites and active lattice oxygen that boost the dehydrogenation step in the photo‐oxidation of alcohols.

Subjects

ALCOHOLS (Chemical class); ALDEHYDES; OXIDATION; PHOTOCATALYSIS; PRECIOUS metals; PHOTOOXIDATION

Publication

Angewandte Chemie, 2019, Vol 131, Issue 19, p6331

ISSN

0044-8249

Publication type

Academic Journal

DOI

10.1002/ange.201900773