Oxidant‐Free Alcohol Dehydrogenation Using a Reusable Hydrotalcite‐Supported Silver Nanoparticle Catalyst

Abstract

Additive free: Hydrotalcite‐supported silver nanoparticles act as a highly efficient heterogeneous catalyst for the dehydrogenation of diverse alcohols (see picture) in the absence of any acceptors such as molecular oxygen, hydrogen peroxide, or unsaturated organic compounds. The solid Ag catalyst was readily reusable without any loss of activity and selectivity.

Biomass into chemicals: One-pot two- and three-step synthesis of quinoxalines from biomass-derived glycols and 1,2-dinitrobenzene derivatives using supported gold nanoparticles as catalysts

“…As can be seen in and OH -mainly) which has been reported as an excellent catalyst for alcohol oxidation that form Au-alcoholate species [63][64][65][66] due to the basic surfaces of HT. However, when HT support is calcined, the layered structure disappears and a mixed Al 2 O 3 -MgO oxide is formed that presents stronger basicity than the starting hydrotalcite [67].…”

Supported rhenium nanoparticle catalysts for acceptorless dehydrogenation of alcohols: structure–activity relationship and mechanistic studies

“…To meet environmental and economical acceptability, efforts have been devoted to heterogeneous catalytic systems for acceptorless dehydrogenation of alcohols. [8][9][10][11][12][13][14][15][16][17][18][19][20] However, rational improvement of the catalytic efficiency of heterogeneous catalyst for this reaction is still difficult due to a lack of fundamental information on the structure-activity relationship and reaction mechanism. For example, controversial models are proposed on the oxidation states of transition metal catalysts for this reaction; metallic species are proposed to be effective for the supported Ag, 17 Co, 18 Ni 19 and Pt 20 catalysts, whereas Re 0 -core/ReO 2 -shell model is proposed as an active Re species of unsupported nanocrystalline catalyst.…”

Dehydrogenative Oxidation of Alcohols Catalyzed by Highly Dispersed Ruthenium Incorporated Titanium Oxide

“…In comparison with other heterogeneous catalytic systems in oxidant-free conditions (Au/CeO2, (TOF = 125 h −1 ) [7], Ag/Al2O3 (>2 h −1 ) [9], Ru/AlO(OH) (7 h −1 ) [39], Cu/hydrotalcite (1.5 h −1 ) [40], Cu/Al2O3 (8.3 h −1 ) [41]), our value is higher except for the silver nanoparticles on the hydrotalcite system (590 h −1 ) [11].…”

“…Recently, nickel complexes were also reported [8]. In heterogeneous dehydrogenative catalytic systems, mainly noble metals catalysts were reported: alumina-supported silver cluster, hydrotalcite supported silver nanoparticles, ceria supported gold nanoparticles, alumina-supported Pt nanoparticles, alumina-supported Re nanoparticles [9][10][11][12][13]. Particularly, high reactivity was reported for the oxidation of aliphatic alcohols in anaerobic condition [12].…”