Solid Base Bi 24 O 31 Br 10 (OH) δ with Active Lattice Oxygen for the Efficient Photo-Oxidation of Primary Alcohols to Aldehydes

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

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

The selective oxidation of primary alcohols to aldehydes by O 2 instead of stoichiometric oxidants (for example, Mn VII , Cr VI , and Os IV ) 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 Bi 24 O 31 Br 10 (OH) δ photocatalyst is very efficient in the selective oxidation of a series of aliphatic (carbon chain from C 1 to C 10 ) 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 Bi 24 O 31 Br 10 (OH) δ photocatalyst is associated with basic surface sites and active lattice oxygen that boost the dehydrogenation step in the photo-oxidation of alcohols.

Original languageEnglish
JournalAngewandte Chemie
Volume131
Issue19
Pages (from-to)6265-6270
Number of pages6
ISSN0044-8249
DOIs
Publication statusPublished - May 2019

Keywords

  • active lattice oxygen
  • photo-oxidation
  • primary alcohols
  • solid base
  • visible-light photocatalysis

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