Article

Structure sensitivity of carbon-nitrogen ring opening: impact of platinum particle size from below 1 to 5 nm upon pyrrole hydrogenation product selectivity over monodisperse platinum nanoparticles loaded onto mesoporous silica.

Department of Chemistry, University of California, Berkeley, California 94720, USA.
Journal of the American Chemical Society (impact factor: 9.91). 11/2008; 130(43):14026-7. DOI:10.1021/ja805050c pp.14026-7
Source: PubMed

ABSTRACT Well-defined platinum nanoparticles between 0.8 and 5.0 nm were prepared using dendrimer and polymer capping agents and supported onto mesoporous SBA-15 silica. Using these model catalysts, pyrrole hydrogenation was demonstrated to be structure sensitive because ring opening occurred more easily over larger particles compared to smaller ones. The phenomenon is caused by surface roughness or electronic effects that change with particle size.

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Keywords

electronic effects
 
larger particles
 
mesoporous SBA-15 silica
 
particle size
 
smaller ones
 
structure sensitive
 
surface roughness
 

John Kuhn