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Ceria Promoted Cu-Ni/SiO2 Catalyst for Selective Hydrodeoxygenation of Vanillin.


ABSTRACT: A ceria (CeO2) promoted Cu-Ni bimetallic catalyst supported on SiO2 (Cu-Ni/CeO2-SiO2) was prepared and evaluated for catalytic hydrodeoxygenation (HDO) of vanillin. Silica supported monometallic Cu and Ni catalysts and bimetallic Cu-Ni catalyst (Cu/SiO2, Ni/SiO2, and Cu-Ni/SiO2), without a ceria promoter, were also synthesized and tested for the same application. The highest conversion of vanillin was achieved with the Cu-Ni/CeO2-SiO2 catalyst. Vanillyl alcohol was the sole product in the initial 2 h, followed by the formation of 2-methoxy-4-methylphenol, which was observed. Characterization of the synthesized catalysts revealed the presence of overlapping crystalline phases of CuO, NiO, and CeO2 on the Cu-Ni/CeO2-SiO2 surface. We extended our study to find out the results of using CeO2 as the support of the Cu-Ni bimetallic catalyst (Cu-Ni/CeO2). Partial incorporation of Cu and Ni cations into the ceria lattice took place, leading to the decrease of specific surface area and a concomitant compromise in the conversion. In the case of the Cu-Ni/CeO2-SiO2 catalyst, the higher conversion was accredited to the facile formation of Cu+ active centers by the synergistic interaction between Ce+4/Ce+3 and Cu+2/Cu+ redox couples and the incorporation of oxygen vacancies on the catalyst surface.

SUBMITTER: Mukherjee D 

PROVIDER: S-EPMC6648372 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

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Ceria Promoted Cu-Ni/SiO<sub>2</sub> Catalyst for Selective Hydrodeoxygenation of Vanillin.

Mukherjee Deboshree D   Singuru Ramana R   Venkataswamy Perala P   Damma Devaiah D   Reddy Benjaram M BM  

ACS omega 20190304 3


A ceria (CeO<sub>2</sub>) promoted Cu-Ni bimetallic catalyst supported on SiO<sub>2</sub> (Cu-Ni/CeO<sub>2</sub>-SiO<sub>2</sub>) was prepared and evaluated for catalytic hydrodeoxygenation (HDO) of vanillin. Silica supported monometallic Cu and Ni catalysts and bimetallic Cu-Ni catalyst (Cu/SiO<sub>2</sub>, Ni/SiO<sub>2</sub>, and Cu-Ni/SiO<sub>2</sub>), without a ceria promoter, were also synthesized and tested for the same application. The highest conversion of vanillin was achieved with the  ...[more]

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