The nature of active sites in Pt–ReO X /TiO 2 catalysts for selective hydrogenation of carboxylic acids to alcohols

A well fabricated PtSn/SiO2 catalyst with enhanced synergy between Pt and Sn for acetic acid hydrogenation to ethanol

“…It was speculated that Pt-(O-Si^) y 2Ày analogous species might be formed by the interaction between [Pt(NH 4 ) 3 ] 2+ and SiOH groups. 14 For the PtSn1.6/SiO 2 -MIM catalyst, two reduction peaks are centered at 272 C and 360 C, the former could be assigned to the co-reduction of Pt and Sn species and the later could be the reduction of 33,34 Therefore, the infrared experiments of pyridine adsorption were carried out to detect the surface acidity of PtSn catalysts. HAADF-STEM.…”

Mechanistic study of the selective hydrogenation of carboxylic acid derivatives over supported rhenium catalysts

“…Because it is highly desired to replace fossil fuels as chemical and energy sources, much attention has been given to the conversion of biomass materials into fuels and chemicals. [66][67][68][69][70][71][72] Among biomass materials, triglycerides serve as the most important feedstocks for the synthesis of fatty amines, amides, nitriles and alcohols used in the production of surfactants, polymers and other useful commodity chemicals. 73 However, benign manufacturing processes for the direct transformation of triglycerides into these chemicals are not well developed.…”

Highly selective/enantioselective Pt-ReO /C catalyst for hydrogenation of L-malic acid at mild conditions

“…In the case of hydrogenation of carboxylic acids, selectivity/enantioselectivity to alcohols depends to a great extent on conditions of the heterogeneous catalytic reaction, primarily on the number and type of functional groups in the platform molecule. Impressive selectivities to alcohols were reached in recent years upon hydrogenation of fatty acids [1][2][3][4][5][6][7][8] , bifunctional acids having an additional carbonyl (for example, levulinic acid [9,10] ) or hydroxyl group (lactic acid as a typical example [11,12] ), and dibasic carboxylic acids (mostly succinic acid [9,[13][14][15] ). Products of the indicated reactions -mono-and diatomic alcohols -are the key intermediates for the production of lubricants, surfactants, plasticizers, and other specialty chemicals and polymers.…”