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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Thermally stable Pt/mesoporous silica core-shell nanocatalysts for high-temperature reactions

Cited 481 times inthomson ciCited 438 times inthomson ci
Title
Thermally stable Pt/mesoporous silica core-shell nanocatalysts for high-temperature reactions
Author
Joo, Sang HoonPark, Jeong YoungTsung, CKYamada, YusukeYang, PeidongSomorjai, Gabor A
Issue Date
2009-02
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE MATERIALS, v.8, no.2, pp.126 - 131
Abstract
Recent advances in colloidal synthesis enabled the precise control of the size, shape and composition of catalytic metal nanoparticles, enabling their use as model catalysts for systematic investigations of the atomic-scale properties affecting catalytic activity and selectivity. The organic capping agents stabilizing colloidal nanoparticles, however, often limit their application in high-temperature catalytic reactions. Here, we report the design of a high-temperature-stable model catalytic system that consists of a Pt metal core coated with a mesoporous silica shell (Pt@mSiO"2). Inorganic silica shells encaged the Pt cores up to 750°C in air and the mesopores providing direct access to the Pt core made the Pt@mSiO"2 nanoparticles as catalytically active as bare Pt metal for ethylene hydrogenation and CO oxidation. The high thermal stability of Pt@mSiO"2 nanoparticles enabled high-temperature CO oxidation studies, including ignition behaviour, which was not possible for bare Pt nanoparticles because of their deformation or aggregation. The results suggest that the Pt@mSiO"2 nanoparticles are excellent nanocatalytic systems for high-temperature catalytic reactions or surface chemical processes, and the design concept used in the Pt@mSiO"2 core-shell catalyst can be extended to other metal/metal oxide compositions.
URI
https://scholarworks.unist.ac.kr/handle/201301/6721
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=58849122636
DOI
10.1038/nmat2329
ISSN
1476-1122
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CHM_Journal Papers
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