Selective oxidation of bio-based platform molecules and their conversion products over metal nanoparticle catalysts: a review

Тимофеев, К. Л.; Vodyankina, O. V.

doi:10.1039/d0re00352b

Cited by 12 publications

(11 citation statements)

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“…Experimental studies of the PG selective oxidation into carbonyl/carboxylic compounds (methylglyoxal, hydroxyacetone, etc.) are known in the literature for catalysts with supported metal nanoparticles, including Ag [ 5 , 6 , 7 ], Pt [ 8 ] and Pd [ 9 , 10 , 11 , 12 ]. The mechanism of PG conversion was theoretically studied over the Ag 4 cluster [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism of PG conversion was theoretically studied over the Ag 4 cluster [ 13 ]. As in the case of ethylene glycol oxidation [ 9 , 14 , 15 ], the PG adsorption on the surface of single crystal Ag (110) and Pd (111) coated with oxygen led to the breaking of O–H bonds with the formation of the intermediate 1,2-propanedioxy (–OCH(CH 3 )CH 2 O–, PDO) [ 5 , 6 , 9 ]. As the temperature increased, the PDO transformations yielded a number of products, including hydroxyacetone or acetol (CH 3 COCH 2 OH), lactaldehyde (CH 3 CH(OH)CHO), and methylglyoxal or pyruvaldehyde (CH 3 COCHO).…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [ 9 ], using the adsorption of ethylene glycol and PG on Pd (111) as an example it was shown that the intermediate compounds were strongly bound to the surface with Pd (111) in a planar orientation; as a result, glyoxal and methylglyoxal were desorbed in small amounts at temperatures above 250 K, however, they were primarily decarbonylated to form CO, H 2 and methane. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Modifier Effect in Silica-Supported FePO4 and Fe-Mo-O Catalysts for Propylene Glycol Oxidation

et al. 2022

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Currently, catalytic processing of biorenewable raw materials into valuable products attracts more and more attention. In the present work, silica-supported FePO4 and Fe-Mo-O catalysts are prepared, their phase composition, and catalytic properties are studied in the process of selective oxidation of propylene glycol into valuable mono- and bicarbonyl compounds, namely, hydroxyacetone and methylglyoxal. A comparative analysis of the main routes of propylene glycol adsorption with its subsequent oxidative conversion into carbonyl products is carried out. The DFT calculations show that in the presence of adsorbed oxygen atom, the introduction of the phosphate moiety to the Fe-containing site strengthens the alcohol adsorption on the catalyst surface with the formation of the 1,2-propanedioxy (–OCH(CH3)CH2O–) intermediate at the active site. The introduction of the molybdenum moiety to the Fe-containing site in the presence of the adsorbed oxygen atom is also energetically favorable, however, the interaction energy is found by 100 kJ/mol higher compared to the case with phosphate moiety that leads to an increase in the propylene glycol conversion while maintaining high selectivity towards C3 products. The catalytic properties of the synthesized iron-containing catalysts are experimentally compared with those of Ag/SiO2 sample. The synthesized FePO4/SiO2 and Fe-Mo-O/SiO2 catalysts are not inferior to the silver-containing catalyst and provide ~70% selectivity towards C3 products, while the main part of propylene glycol is converted into methylglyoxal in contrast to the Ag/SiO2 catalyst featuring the selective transformation of only the secondary C-OH group in the substrate molecule under the studied conditions with the formation of hydroxyacetone. Thus, supported Fe-Mo-O/SiO2 catalysts are promising for the selective oxidation of polyatomic alcohols under low-temperature conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modifier Effect in Silica-Supported FePO4 and Fe-Mo-O Catalysts for Propylene Glycol Oxidation

et al. 2022

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“…Intensification of catalytic processes for selective conversion of biomass derivatives into value-added chemicals by catalyzing multistep transformations over single multifunctional catalyst has been attracting increasing attention during the past two decades due to "green" chemistry and cost effectiveness requirements [1]. Propylene glycol (PG) conversion into lactic acid (LA) under mild conditions is one of the important processes related to production of monomer for biodegradable plastics from bio-renewable feedstock [2]. This process consists of three consecutive steps, including the oxidation of the secondary hydroxyl group of PG with the formation of hydroxyacetone (HA) for the first step and HA oxidation in to methylglyoxal (MGO) during the second step.…”

Section: Introductionmentioning

confidence: 99%

“…The noble metal nanoparticles on different supports such as carbon, Materials 2020, 13, 5471 2 of 18 alumina, silica, etc. [2] are often used as catalysts for the oxidation of alcohols. Alkaline media catalyzes the last step of the process.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic AgPd/UiO-66 Hybrid Catalysts for Propylene Glycol Oxidation into Lactic Acid

et al. 2020

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Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetonitrile solution, and the double solvent impregnation technique) were employed to immobilize Ag–Pd nanoparticles (NPs) into the pores of the microporous zirconium-based metal-organic framework known as UiO-66. The obtained materials were characterized by using nitrogen adsorption-desorption at −196 °C, powder X-ray diffraction, UV-Vis diffusion reflectance spectroscopy, and transition electron microscopy measurements. Special attention was paid to the acid and redox properties of the obtained materials, which were studied by using temperature-programmed desorption of ammonia (TPD-NH3) and temperature-programmed reduction (TPR-H2) methods. The use of a drying procedure prior to reduction was found to result in metallic NPs which, most likely, formed on the external surface and were larger than corresponding voids of the metal-organic framework. The formation of Ag–Pd alloy or monometallic Ag and Pd depended on the nature of both metal precursors and the impregnation solvent used. Catalytic activity of the AgPd/UiO-66 materials in propylene glycol oxidation was found to be a result of synergistic interaction between the components in AgPd alloyed NPs immobilized in the pore space and on the external surface of UiO-66. The key factor for consistent transformation of propylene glycol into lactic acid was the proximity between redox and acid-base species.

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Hydroxymethylfurfural oxidation over unsupported Pd-Au alloy catalysts prepared by pulsed laser ablation: Synergistic and compositional effects

Тимофеев

Kharlamova

Ezhov

et al. 2023

Applied Catalysis A: General

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Selective oxidation of bio-based platform molecules and their conversion products over metal nanoparticle catalysts: a review

Abstract: Nowadays, the processing of bio-renewable raw materials into biofuels and valuable products, namely, bifunctional carbonyl/carboxyl compounds that serve as the basis for biopolymers, has become one of the most important...

Cited by 12 publications

References 127 publications

Modifier Effect in Silica-Supported FePO4 and Fe-Mo-O Catalysts for Propylene Glycol Oxidation

Modifier Effect in Silica-Supported FePO4 and Fe-Mo-O Catalysts for Propylene Glycol Oxidation

Bimetallic AgPd/UiO-66 Hybrid Catalysts for Propylene Glycol Oxidation into Lactic Acid

Hydroxymethylfurfural oxidation over unsupported Pd-Au alloy catalysts prepared by pulsed laser ablation: Synergistic and compositional effects

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