Abstract
Catalysis has witnessed a dramatic increase on the use of metallic nanoparticles in the last decade, opening endless opportunities in a wide range of research areas. As one of the most investigated catalysts in organic synthesis, palladium finds numerous applications being of significant relevance in industrial hydrogenation reactions. The immobilization of Pd nanoparticles in porous solid supports offers great advantages in heterogeneous catalysis, allowing control of the major factors that influence activity and selectivity. The present review deals with recent developments in the preparation and applications of immobilized Pd nanoparticles on solid supports as catalysts for hydrogenation reactions, aiming to give an insight on the key factors that contribute to enhanced activity and selectivity. The application of mesoporous silicas, carbonaceous materials, zeolites, and metal organic frameworks (MOFs) as supports for palladium nanoparticles is addressed.
Highlights
Throughout the last two decades, nanoparticles (NPs) emerged as a new type of important functional material, playing a major role in several areas, from electronics to the development of composite materials [1,2]
These PdO NPs were mixed into the ZSM-5 through a solvothermal process, and uniform-sized and non-aggregated Palladium nanoparticles (PdNPs) confined within ZSM-5 structure were achieved after calcination and reduction
In light of the findings discussed in this review, the immobilization of PdNPs in solid supports is a hot topic among the research community, especially in catalytic processes
Summary
Throughout the last two decades, nanoparticles (NPs) emerged as a new type of important functional material, playing a major role in several areas, from electronics to the development of composite materials [1,2]. One of the main reasons for the rapidly expanding area of MNPs synthesis is the encouraging results obtained in catalysis [6,7] From this universe, 37% of the reported studies correspond to applications with palladium NPs (Figure 1). The synthesis of heterogenized catalysts for immobilization robust immobilization strategies effectively control the size, shape, and dispersion of PdNPs; achieving high and high stable activity. That can effectively control the size, shape, and dispersion ofthus, PdNPs; achieving and stable This short review covers some of the latest developments for supported PdNPs, highlighting activity. PdNPs, The highlighting performance of the supported towards hydrogenation reactions is addressed, exploring the key some new easy approaches forPdNPs their preparation, as well as green synthesis approaches. Performance of the activity supported towards hydrogenation reactions is addressed, exploring the key factors for catalytic activity and selectivity enhancement
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