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- W2951872515 abstract "No other method rivals electron microscopy (EM) in the wealth of structural (atomic, nanoscopic, microscopic, and mesoscopic), topographic, and electronic information that it provides in the characterization of solid catalysts such as those used commercially, for laboratory trials or model studies: EM provides deep insights into the structure of solid catalysts—their precursors, active sites, and expired or regenerated forms—as well as vital clues to their mode of operation. In some important instances it serves as the only trustworthy means of determining the structure and composition of a catalyst. After a brief update on the significance of recent advances in EM techniques which allow (i) the probing of catalysts at atomic resolution, (ii) electron crystallography, and (iii) the determination of the chemical compositions of catalysts, we illustrate these achievements with specific examples. These include (a) pin-pointing the location and topography of nanoparticle catalysts; (b) constructing elemental maps (and compositional distributions) of solid catalysts; (c) in situ investigations of active sites and reaction processes at the atomic level; (d) elucidating the nature of intergrowths (coherent, recurrent, and random) of closely similar structures within a supposed new catalyst; (e) identifying atoms (or small groups of atoms) of high atomic number supported on high-area solids; and (f) characterizing nanoparticles on uneven supports. In (a) and (e) the recently developed technique of electron tomography plays a crucial role." @default.
- W2951872515 created "2019-06-27" @default.
- W2951872515 creator A5021578053 @default.
- W2951872515 creator A5063097785 @default.
- W2951872515 date "2004-01-01" @default.
- W2951872515 modified "2023-10-17" @default.
- W2951872515 title "Electron Microscopy and the Materials Chemistry of Solid Catalysts" @default.
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