Base-free glycerol oxidation over N-TiO2 supported Au–Pt catalysts

Cherni, Dhia; Moussa, Noomen; Nsib, Mohamed Faouzi; Evangelisti, Claudio; Prati, Laura; Villa, Alberto

doi:10.1007/s11144-019-01678-7

Cited by 6 publications

(2 citation statements)

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“…The series of TiO 2 materials were subsequently employed as supports for Pt nanoparticles. PVA-stabilized Pt colloids were generated using an established method, 39 and deposited onto each of the TiO 2 materials (theoretical Pt wt % = 1). The nomenclature used to describe each of these materials was Pt/ TiO 2 -X (where X = calcination temperature in °C).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

et al. 2022

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The use of heterogeneous catalysts to convert glycerol into lactic acid has been extensively investigated in recent years. Several different strategies have been employed, but importantly, the highest production rates of lactic acid are achieved through aerobic oxidation under alkaline conditions. Despite the progress made in this area, insight into how the catalytic properties influence the selectivity of the competing pathways, oxidative dehydrogenation and dehydration, remains limited. Developing a deeper understanding is therefore critical, if process commercialization is to be realized. Using a model Pt/TiO2 catalyst, we set out to investigate how the supported metal particle size and support phase influenced the selectivity of these two pathways. Both these parameters have a profound effect on the reaction selectivity. Using a range of characterization techniques and through adopting a systematic approach to experimental design, important observations were made. Both pathways are first instigated through the oxidative dehydrogenation of glycerol, leading to the formation of glyceraldehyde or dihydroxyacetone. If these intermediates desorb, they rapidly undergo dehydration through a reaction with the homogeneous base in solution. Based on the experimental evidence we therefore propose that selectivity to lactic acid is influenced by surface residence time.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

et al. 2022

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“…11 The oxidation of glycerol was originally performed under basic conditions, 12,13 but base-free processes using molecular oxygen as the oxidant and Pt, Pd or Au-based catalysts have also been developed. 14,15 The reaction conditions (temperature, reactant concentration, pressure), the nature of the noble metal and of the support can greatly influence the selectivity toward DHA. 16 Gold was identified as the best metal to perform the oxidation of glycerol.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional Au–Sn-SiO₂ catalysts promote the direct upgrading of glycerol to methyl lactate

Van der Verren,

Corrias,

Vykoukal

et al. 2024

Nanoscale

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Activation conditions of bentonite supports over gold-based catalysts for production of lactic acid from glycerol

Çelik

Yıldız

2020

Reac Kinet Mech Cat

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Base-free glycerol oxidation over N-TiO2 supported Au–Pt catalysts

Cited by 6 publications

References 46 publications

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

Bifunctional Au–Sn-SiO₂ catalysts promote the direct upgrading of glycerol to methyl lactate

Activation conditions of bentonite supports over gold-based catalysts for production of lactic acid from glycerol

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Base-free glycerol oxidation over N-TiO2 supported Au–Pt catalysts

Cited by 6 publications

References 46 publications

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO2

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO2

Bifunctional Au–Sn-SiO2 catalysts promote the direct upgrading of glycerol to methyl lactate

Activation conditions of bentonite supports over gold-based catalysts for production of lactic acid from glycerol

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Product

Resources

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Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

Bifunctional Au–Sn-SiO₂ catalysts promote the direct upgrading of glycerol to methyl lactate