Highly Efficient Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol over CoRe/TiO 2 Catalyst.

Autor:	Chen, Mengting, Wang, Yun, Jiang, Limin, Cheng, Yuran, Liu, Yingxin, Wei, Zuojun
Předmět:	TITANIUM dioxide HYDROGENATION BIMETALLIC catalysts FORMIC acid CATALYSTS ALLYL alcohol ALCOHOL
Zdroj:	Molecules; Apr2023, Vol. 28 Issue 8, p3336, 13p
Abstrakt:	Allylic alcohols typically produced through selective hydrogenation of α,β-unsaturated aldehydes are important intermediates in fine chemical industry, but it is still a challenge to achieve its high selectivity transformation. Herein, we report a series of TiO2-supported CoRe bimetallic catalysts for the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using formic acid (FA) as a hydrogen donor. The resultant catalyst with the optimized Co/Re ratio of 1:1 can achieve an exceptional COL selectivity of 89% with a CAL conversion of 99% under mild conditions of 140 °C for 4 h, and the catalyst can be reused four times without loss of activity. Meanwhile, the Co1Re1/TiO2/FA system was efficient for the selective hydrogenation of various α,β-unsaturated aldehydes to the corresponding α,β-unsaturated alcohols. The presence of ReOx on the Co1Re1/TiO2 catalyst surface was advantageous to the adsorption of C=O, and the ultrafine Co nanoparticles provided abundant hydrogenation active sites for the selective hydrogenation. Moreover, FA as a hydrogen donor improved the selectivity to α,β-unsaturated alcohols. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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