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An, Kwangjin
Advanced Nanocatalysis Lab (An Lab)
Research Interests
  • Nanoparticle catalytsts, catalytic activity, selectivity, and stability, strong metal-support interactions, biofuel conversion

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Size and Shape Control of Metal Nanoparticles for Reaction Selectivity in Catalysis

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Title
Size and Shape Control of Metal Nanoparticles for Reaction Selectivity in Catalysis
Author
An, KwangjinSomorjai, Gabor A.
Keywords
catalyst; colloid; in situ characterization; nanoparticles; selectivity
Issue Date
2012-10
Publisher
WILEY-V C H VERLAG GMBH
Citation
CHEMCATCHEM, v.4, no.10, pp.1512 - 1524
Abstract
A nanoparticle with well-defined surfaces, prepared through colloidal chemistry, enables it to be studied as a model heterogeneous catalyst. The colloidal synthetic approach provides versatile tools to control the size and shape of nanoparticles. Traditional nucleation and growth mechanisms have been utilized to understand how nanoparticles can be uniformly synthesized and unprecedented shapes can be controlled. Now, the size of metal particles can be controlled to cluster regimes by using dendrimers. By using seeds and foreign atoms, specific synthetic environments such as seeded growth and crystal overgrowth can be induced to generate various shaped mono- or bi-metallic, core/shell, or branched nanostructures. For green chemistry, catalysis in 21st century is aiming for 100?% selectivity to produce only one desired product at high turnover rates. Recent studies on nanoparticle catalysts clearly demonstrate size and shape dependent selectivity in many catalytic reactions. By combining in situ surface characterization techniques, real-time monitoring of nanoparticles can be performed under reaction environments, thus identifying several molecular factors affecting catalytic activity and selectivity.
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DOI
10.1002/cctc.201200229
ISSN
1867-3880
Appears in Collections:
ECHE_Journal Papers
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