Ag-Based Catalysts in Heterogeneous Selective Oxidation of Alcohols: A Review

Abstract

Alcohols (bioalcohols) is a class of chemicals that are used as a feedstock for the manufacturing of a large number of valuable intermediates in industrially important processes. Currently, sustainable technologies for selective conversion of alcohols utilize “green” oxidants, mainly, ambient air or oxygen. Due to the high affinity of oxygen towards silver, the latter serves as an active component of supported heterogeneous catalysts. In this review, we consider Ag-based catalysts that participate in gas- or liquid-phase oxidation of alcohols. Oxidation of methanol, ethanol, ethylene glycol, propylene glycol, glycerol, benzyl and allyl alcohols is mostly considered. A particular attention is paid to selective photooxidation of alcohols over Ag-based catalysts. We discuss the catalyst composition in terms of (1) the state of the active component, (2) the nature of the substrate, (3) support nature, and (4) the strength of the metal–support interactions.

Supported Gold Nanoparticles as Catalysts for the Oxidation of Alcohols and Alkanes

“…The liquid phase oxidation of alcohols is a good example of a selective oxidation reaction, important in both academia and industry, which is an interesting path for obtaining fine chemicals and intermediates (Besson and Gallezot, 2000; Sheldon and Van Bekkum, 2001; Mallat and Baiker, 2004; Enache et al, 2006; Dimitratos et al, 2012; Guo et al, 2014; Ranveer et al, 2015; Olenin et al, 2018; Torbina et al, 2018). It has been the subject of important research, due the need to use renewable biomass-derived feedstocks and replace toxic oxidants by more environmentally friendly ones.…”

Acetalization Catalysts for Synthesis of Valuable Oxygenated Fuel Additives from Glycerol

“…A large number of value-added chemicals such as propanediols [39], acrolein [40], dihydroxyacetone [41], glyceric acid [42], hydrogen [43], synthesis gas [44], esters [45,46], etc., can be produced from glycerol using oxidation, reduction and other catalytic reactions (Scheme 1). Oxidation of primary, secondary, and all three groups yields different molecules of C 3 acids, aldehydes, and ketones [47,48]. Selective hydrogenolysis of glycerol in the presence of metallic catalysts and hydrogen can produce 1.2-propanediol (1.2-PDO) [49], 1.3-propanediol (1.3-PDO), or ethylene glycol (EG).…”

Comparison of Chemical and Biological Properties of Metal Nanoparticles (Au, Ag), with Metal Oxide Nanoparticles (ZnO-NPs) and their Applications

“…These features became the basis for the application of Agbased catalysts in methanol oxidation in the industrial gaseous phase to form formaldehyde and oxidation of ethylene glycol to glyoxal. Recent trends in the development of Ag-based catalysts for selective oxidation of alcohol have been summarised in both gas and liquid phase processes as well as in photocatalytic applications [82].…”