Selective oxidation of 5-hydroxymethyl-2-furfural over TiO2-supported gold–copper catalysts prepared from preformed nanoparticles: Effect of Au/Cu ratio

Effect of Selected Factors on Catalytic Activity of Bimetallic Copper-Gold Catalysts in Selective Oxidation of Glycerol

“…Gold loaded on ceria, zirconia and cerium-zirconium mixed oxide was characterised in the XP two doublets attributed to different gold species (Figures S5 and S6), corresponding to (Au 0 ) gold particles loading on the surface of catalysts [33,66]. The smaller size of metallic gold particles in 518 the bimetallic catalysts was confirmed by the STEM-EDXS results (Fig.…”

Insights into the reaction mechanism for 5-hydroxymethylfurfural oxidation to FDCA on bimetallic Pd–Au nanoparticles

“…Mono-and bimetallic nanoparticles were prepared using a method previously described [18,20,[32][33][34]. In brief, the necessary quantity of polyvinylpyrrolidone, used as a nanoparticle stabilizer, was added to a solution of NaOH in water.…”

“…In our previous studies [18,20], we synthesized titania-supported Au and Au-Cu nanoparticles by using PVP-stabilized sols with controlled size, structure and composition. Unprecedented catalytic activity and stability were obtained with these catalytic materials in the oxidation of HMF to FDCA.…”

Advances in Base-Free Oxidation of Bio-Based Compounds on Supported Gold Catalysts

“…However, the basic medium also favors HMF degradation and requires a final neutralization step, which is not desirable from the environmental and Au-based catalysts have been reported to perform this reaction in water and in the presence of an excess of base with high yields of FDCA [56][57][58][59][60][61]. Au-containing bimetallic catalysts were developed in order to improve the catalytic performance, but required the use of a homogenous base [33,58,[62][63][64][65][66][67]. The basic medium provides higher reaction rates and, in the majority of cases, is essential to get a high catalytic activity.…”