PtO₂as a “self-dosing” hydrosilylation catalyst

Evidence for the “cocktail” nature of platinum-catalyzed alkyne and alkene hydrosilylation reactions

“…43,44 It should be noted that some aspects of the dynamic nature have been noticed for Pt-catalysed hydrosilylation. Discussions on the catalyst changes during the reaction, [45][46][47][48] the existence of leaching, 49 and the formation of colloidal particles [50][51][52][53][54][55] and nanoparticles [56][57][58][59] have been reported. The catalytic activity of platinum clusters 60,61 and platinum nanoparticles [62][63][64][65] in the hydrosilylation reaction of alkynes has also been studied.…”

Closing the Organosilicon Synthetic Cycle: Efficient Heterogeneous Hydrosilylation of Alkenes over SiliaCatPt(0)

“…Remarkably, in 2003, a silica-supported Karstedt (Pt)-type catalyst was reported having high catalytic activity at room temperature under atmospheric pressure, while being reusable five times without any appreciable loss in the catalytic activity . Research on the topic continues with recent advances including homogeneous catalysis by “self-dosing” PtO 2 releasing the soluble active species …”

Synthesis of Single Atom Based Heterogeneous Platinum Catalysts: High Selectivity and Activity for Hydrosilylation Reactions

“…For example, Béland and Pagliaro reported small Pt(0) nanoparticles (4–6 nm) encapsulated in a sol–gel derived porous matrix of methyltriethoxysilane for the hydrosilylation of different olefins with triethoxysilane in the presence of 1 mol % catalyst. Simple PtO 2 was studied in the hydrosilylation of heptamethyltrisiloxane with n -octene, which revealed that initially Pt­(IV) is reduced during the reaction to form the active sites . So far, only a silica-supported Karstedt Pt-type catalyst and crystalline Pt nanoparticles embedded into the walls of a mesostructured silica framework showed high catalytic activity on this reaction. , Thus, to the best of our knowledge general heterogeneous Pt-based catalysts with broad substrate scope, high regioselectivity, and high activity comparable to homogeneous systems do not exist.…”