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Nanopore and nanoparticle catalysts

Thomas, J.M. and Raja, R. (2001) Nanopore and nanoparticle catalysts Chemical Record, 1, (6), pp. 448-466. (doi:10.1002/tcr.10003).

Record type: Article

Abstract

The design, atomic characterization, performance, and relevance to clean technology of two distinct categories of new nanocatalysts are described and interpreted. Exceptional molecular selectivity and high activity are exhibited by these catalysts. The first category consists of extended, crystallographically ordered inorganic solids possessing nanopores (apertures, cages, and channels), the diameters of which fall in the range of about 0.4 to about 1.5 nm, and the second of discrete bimetallic nanoparticles of diameter 1 to 2 nm, distributed more or less uniformly along the inner walls of mesoporous (ca. 3 to 10 nm diameter) silica supports. Using the principles and practices of solid-state and organometallic chemistry and advanced physico-chemical techniques for in situ and ex situ characterization, a variety of powerful new catalysts has been evolved. Apart from those that, inter alia, simulate the behavior of enzymes in their specificity, shape selectivity, regio-selectivity, and ability to function under ambient conditions, many of these new nanocatalysts are also viable as agents for effecting commercially significant processes in a clean, benign, solvent-free, single-step fashion. In particular, a bifunctional, molecular sieve nanopore catalyst is described that converts cyclohexanone in air and ammonia to its oxime and caprolactam, and a bimetallic nanoparticle catalyst that selectively converts cyclic polyenes into desirable intermediates. Nanocatalysts in the first category are especially effective in facilitating highly selective oxidations in air, and those in the second are well suited to effecting rapid and selective hydrogenations of a range of organic compounds.

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More information

Published date: 2001
Keywords: solvent-free, aluminophosphates, supported ruthenium, low-temperature, mesoporous silica, solvent-free processes, solid acid catalyst, bimetallic nanoparticles, active-sites, molecular-sieve catalysts, bifunctional nanocatalysts, selective oxidation, rutherford scattering, ammonia-synthesis, enzyme mimics

Identifiers

Local EPrints ID: 54150
URI: http://eprints.soton.ac.uk/id/eprint/54150
ISSN: 1527-8999
PURE UUID: 913a9222-5cfb-4197-b7cb-7d72d5b2edef

Catalogue record

Date deposited: 31 Jul 2008
Last modified: 17 Jul 2017 14:36

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Contributors

Author: J.M. Thomas
Author: R. Raja

University divisions

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