Supported metal nanoparticles on porous materials. Methods and applications

Abstract

Nanoparticles are regarded as a major step forward to achieving the miniaturisation and nanoscaling effects and properties that have been utilised by nature for millions of years. The chemist is no longer observing and describing the behaviour of matter but is now able to manipulate and produce new types of materials with specific desired physicochemical characteristics. Such materials are receiving extensive attention across a broad range of research disciplines. The fusion between nanoparticle and nanoporous materials technology represents one of the most interesting of these rapidly expanding areas. The harnessing of nanoscale activity and selectivity, potentially provides extremely efficient catalytic materials for the production of commodity chemicals, and energy needed for a future sustainable society. In this tutorial review, we present an introduction to the field of supported metal nanoparticles (SMNPs) on porous materials, focusing on their preparation and applications in different areas.

Novel synthesis of thick wall coatings of titania supported Bi poisoned Pd catalysts and application in selective hydrogenation of acetylene alcohols in capillary microreactors

“…There are well-developed methods of introduction of catalytically active metal nanoparticles into oxide matrixes, but subsequent deposition of the matrix uniformly on the reactor walls is still a very challenging task, especially for concentrated sols and long reactors. [21][22][23] Two main methods are used to obtain a uniform coating on a substrate: spin-and dip-coating. In the spin-coating technique, the substrate is first covered with an excess of precursor solution that is later removed by centrifugal forces leaving a thin uniform coating after solvent evaporation.…”

New routes to Cu(i)/Cu nanocatalysts for the multicomponent click synthesis of 1,2,3-triazoles

“…1-4 However, whereas the use of nanocatalysts offers enhancements in terms of more economic and sustainable processes where homogeneously catalyzed reactions presently suffer from major drawbacks, [5][6][7][8][9] the susceptibility of nanoparticulate copper to oxidation 10,11 has previously limited applications. In spite of this, processing costs and the search for new combinations of benecial properties have led to continued interest in the replacement of established noble metal nanocatalysts with those of relatively inexpensive metals.…”

From a Review of Noble Metal versus Enzyme Catalysts for Glucose Oxidation Under Conventional Conditions Towards a Process Design Analysis for Continuous-flow Operation

“…Various supports are used: Ideally, the NPs should be prepared with the so called "green concept": least toxic precursor available, carried out in water or other environmentally benign solvents (e.g., ethanol) using lowest possible number of reagents and steps (i.e., a one-pot reaction) and consuming the smallest amount of energy possible whilst minimizing the generation of by-products and waste. The NPs should also be well dispersed on the support surface, providing high activity in the given catalytic transformation [62].…”