Highly efficient and stable Au/Mn2O3 catalyst for oxidative cyclization of 1,4-butanediol to γ-butyrolactone

Authors: Xian Li, Yuanyuan Cui, Xinli Yang, Wei-Lin Dai, Kangnian Fan

Abstract:
In this work, gold nanoparticles deposited on manganese sesquioxide (Mn₂O₃) showed high activity in the oxidative lactonization of 1,4-butanediol to -butyrolactone with air as the oxidant. On the contrary, nano-sized gold supported on manganese dioxide (MnO₂) and manganese oxide (MnO) presented much lower activities. XRD, TEM and XPS characterizations revealed that the superior catalytic performance of Au/Mn₂O₃ could be ascribed to the highest dispersion of gold particles and unique intrinsic properties of Mn₂O₃, which possesses the appropriate point of zero charge for deposition–precipitation method, the most quantity of oxygen vacancies and the appropriate gold–support interaction. Au/Mn₂O₃ exhibited selectivity of 100%, which could facilitate the purification of target product from the reaction mixture. Furthermore, the as-prepared Au/Mn₂O₃ catalyst could be recovered by simple filtration, and used repetitively or preserved for a long period without apparent loss of activity. 

Keywords:
Au/Mn₂O₃ catalyst
Manganese oxides supports
1,4-Butanediol
Oxidative lactionzation

Published in: Applied catalysis A: General  (Volume 458, Pages 1-206, 10 May 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Highly efficient and stable Au/Mn2O3 catalyst for oxidative cyclization of 1,4-butanediol to γ-butyrolactone

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