Heterogeneous Bimetallic Catalysts for Upgrading Biomass‐Derived Furans

Singh, Sanjay Kumar

doi:10.1002/ajoc.201800307

Cited by 35 publications

(27 citation statements)

References 139 publications

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“…[34][35][36][37][38][39][40][41][42][43][44][45][46][47] Recent works indicate that bimetallic catalysts have the potential to enhance the selectivity in the hydrogenation of many different classes of chemicals, such as alkynes, alkenes, imines, and carbonyl compounds, 21,26,39,46,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] as well as biomass-derived molecules. [67][68][69][70][71][72][73] In particular, singleatom alloys, in which dilute amounts of catalytically active elements, e.g. Group 8-10 (VIIIB), are embedded as well-dispersed single atoms in a more inert host, e.g.…”

Section: Introductionmentioning

confidence: 99%

Guidelines to Achieving High Selectivity for the Hydrogenation of α,β-Unsaturated Aldehydes with Bimetallic and Dilute Alloy Catalysts: A Review

et al. 2020

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Selective hydrogenation of α,ß-unsaturated aldehydes to unsaturated alcohols is a challenging class of reactions, yielding valuable intermediates for the production of pharmaceuticals, perfumes, and flavorings. On monometallic heterogeneous catalysts, the formation of the unsaturated alcohols is thermodynamically disfavored over the saturated aldehydes. Hence, new catalysts are required to achieve the desired selectivity. Herein, the literature of three major research areas in catalysis is integrated as a step toward establishing the guidelines for enhancing the selectivity: reactor studies of complex catalyst materials at operating temperature and pressure; surface science studies of crystalline surfaces in ultrahigh vacuum; and first-principles modeling using density functional theory calculations. Aggregate analysis shows that bimetallic and dilute alloy catalysts significantly enhance the selectivity to the unsaturated alcohols compared to monometallic catalysts. This comprehensive review focuses primarily on the role of different metal surfaces as well as the factors that promote the adsorption of the unsaturated aldehyde via its C=O bond, most notably by electronic modification of the surface and formation of the electrophilic sites. Furthermore, challenges, gaps, and opportunities are identified to advance the rational design of efficient catalysts for this class of reactions, including the need for systematic studies of catalytic processes, theoretical modeling of complex materials, and model studies under ambient pressure and temperature.

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Section: Introductionmentioning

confidence: 99%

Guidelines to Achieving High Selectivity for the Hydrogenation of α,β-Unsaturated Aldehydes with Bimetallic and Dilute Alloy Catalysts: A Review

et al. 2020

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“…A variety of other novel homogeneous and heterogeneous catalyst systems offers immense potential in helping to make renewable biofuels into commercial reality [15][16][17][18][19][20]. In this respect, Liu et al [21] have lately exploited an in-situ generated catalyst system of HCl and ZrO(OH) 2 formed by decomposition of ZrOCl 2 •8H 2 O in ethanol, which effectively catalyzed the dehydration/etherification of fructose to 5ethoxymethylfurfural (EMF) (gasoline additive) and subsequent reductive etherification of EMF to 2,5-bis(ethoxymethyl)furan (BEMF) using ethanol as H-donor.…”

Section: New Catalyst Systemsmentioning

confidence: 99%

New synthetic approaches to biofuels from lignocellulosic biomass

Zhu

Abdelaziz

Hulteberg

et al. 2020

Current Opinion in Green and Sustainable Chemistry

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“…One review about heterogeneous bimetallic catalysts for upgrading biomass‐derived furans from Singh et al [39] . have summarized that electronic effect exists in a wide range of bimetallic catalysts, from which the adsorption ability of the furan substrates and the intermediates over the catalytic surface is significantly affected by the modified electronic properties.…”

Section: Effects Of Metal Promoters In Bimetallic Catalysts In Hydrogmentioning

confidence: 99%

Effects of metal promoters in bimetallic catalysts in hydrogenolysis of lignin derivatives into value‐added chemicals

Jia

et al. 2020

ChemCatChem

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Bimetallic catalysts have been widely employed in the lignin hydrogenolysis research, which is attributed to that the interaction between the two metals can regulate the catalyst surface properties, thus improving the catalytic performance. The metal promoters can change the adsorption strength and orientation between the catalyst surface and the substrates, the active sites dispersion and the catalyst stability, so the activity, selectivity and stability of bimetallic catalysts are better than those of the corresponding monometallic catalysts in lignin hydrogenolysis. The effects between the two metals can be divided into the following four types: the electronic (ligand) effect, synergistic effect, stabilizing effect and geometric (ensemble) effect. Herein, these four different effects between the two metals and the reaction mechanisms over different bimetallic catalysts in lignin hydrogenolysis are discussed in this minireview, aiming to point out the challenges and further perspectives in the design of efficient bimetallic catalysts.

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Heterogeneous Bimetallic Catalysts for Upgrading Biomass‐Derived Furans

Cited by 35 publications

References 139 publications

Guidelines to Achieving High Selectivity for the Hydrogenation of α,β-Unsaturated Aldehydes with Bimetallic and Dilute Alloy Catalysts: A Review

Guidelines to Achieving High Selectivity for the Hydrogenation of α,β-Unsaturated Aldehydes with Bimetallic and Dilute Alloy Catalysts: A Review

New synthetic approaches to biofuels from lignocellulosic biomass

Effects of metal promoters in bimetallic catalysts in hydrogenolysis of lignin derivatives into value‐added chemicals

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