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Platinum nanoparticle encapsulation during hydrothermal growth of mesoporous oxides: Synthesis, characterization and catalytic properties

Published online by Cambridge University Press:  01 February 2011

Robert M. Rioux ,
Hyunjoon Song ,
James D Hoefelmeyer ,
Krisztian Niesz ,
Michael Grass ,
Peidong Yang  and
Gabor A Somorjai
Robert M. Rioux
Affiliation:
rmrioux@berkeley.edu, University of California, Berkeley, Chemistry, D54 Hildebrand Hall, Berkeley, CA, 94720, United States, 510-486-5600, 510-643-9668
Hyunjoon Song
Affiliation:
hsong@kaist.ac.kr, University of California, Berkeley, Department of Chemistry, United States
James D Hoefelmeyer
Affiliation:
James.Hoefelmeyer@usd.edu, University of California, Berkeley, Department of Chemistry, United States
Krisztian Niesz
Affiliation:
niesz@berkeley.edu, University of California, Berkeley, Department of Chemistry, United States
Michael Grass
Affiliation:
mgrass@berkeley.edu, University of California, Berkeley, Department of Chemistry, United States
Peidong Yang
Affiliation:
p_yang@berkeley.edu, University of California, Berkeley, Department of Chemistry, United States
Gabor A Somorjai
Affiliation:
somorjai@berkeley.edu, University of California, Berkeley, Department of Chemistry, United States
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Abstract

A synthetic method for the design of heterogeneous catalysts incorporating monodisperse platinum nanoparticles into ordered mesoporous oxide frameworks has been developed. Nanoparticles were synthesized in solution in the presence of surface templating polymer and encapsulated into mesoporous oxide matrices. After polymer removal by calcination, ethylene hydrogenation rates were consistent with previously reported results, while superior activity of low coordination atoms in small crystallites during ethane hydrogenolysis was demonstrated. Changes in reaction selectivity with particle size during the hydrogenation/dehydrogenation of cyclohexene were attributed to a hydrogen coverage effect influencing the hydrogenation pathway and the apparent structure sensitivity of the dehydrogenation pathway.

Keywords

catalyticnanostructurereactivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O04-04
Copyright
Copyright © Materials Research Society 2006

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References

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