Microwave-assisted synthesis of a AuCeO₂/C catalyst and its application for the oxidation of alcohols in an alkaline medium

Abstract

This work reports the electrocatalytic activity of the AuCeO2/C and Au/C catalysts toward oxidation reaction of alcohols: methanol, ethanol, ethylene glycol, and glycerol in an alkaline medium. Gold nanoparticles (AuNPs)...

Supercritical Fluid-Assisted Fabrication of Pd Nanoparticles/Graphene Using a Choline Chloride–Oxalic Acid Deep Eutectic Solvent for Enhancing the Electrochemical Oxidation of Glycerol

“… 7 , 25 , 31 The appearance of another oxidation peak at a more positive potential at −0.11 V is attributed to the oxidation of the remaining adsorbed OH groups on the catalyst surface and the oxidation of several glycerol products. 26 The CVs reveal that the sc-Pd NPs/GR/SPCE has the effect of promoting glycerol oxidation, which shows a more negative onset potential (−0.33 V) and a more significant oxidation current density (42.6 mA cm –2 ) than the Pd NPs/GR/SPCE (27.3 mA cm –2 ). Moreover, the sc-Pd NPs/GR/SPCE shifts the current drop toward higher potentials due to the slower kinetics of the formation of the Pd surface oxide on the surface that would delay the surface deactivation by oxide species coverage.…”

“…Similar to the alcohol oxidation reaction on Pd-based electrocatalysts in alkaline media, the electro-oxidation of glycerol is characterized by the formation of two well-defined anodic current peaks in the forward and reverse scans. 26 , 28 , 45 The freshly chemisorbed species from glycerol adsorption are oxidized in the forward scan. The reverse scan peak is primarily associated with the further electro-oxidation of carbonaceous species, which are not entirely oxidized in the forward scan.…”

“…The use of glycerol in direct glycerol fuel cells has been widely reported as a prospective energy source for many applications. 26 − 31 …”

“…These characteristics make it an excellent candidate for use in fuel cells. The use of glycerol in direct glycerol fuel cells has been widely reported as a prospective energy source for many applications. − …”

Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

“…Cerium dioxide is one of the most intensively studied model supports for various metals (e.g., Cu [1][2][3], Ag [1,4,5], Pt [6] and Au [7,8]). From among numerous ceria-based systems, the catalysts containing gold nanoparticles have attracted particular attention and have been successfully used in different catalytic processes (e.g., Water-Gas Shift reaction [9], oxidation of CO [10,11], alcohols [12][13][14] and formaldehyde [15]). In terms of selective oxidation of alcohols, it has been established that one of the most important factors affecting the activity and selectivity of Au/CeO 2 catalysts is the size of the supported gold nanoparticles [11,16] and the concentration of lattice defects in the ceria support [17].…”