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 | Zendy

John N. Kuhn | Zendy; Wenyu Huang | Zendy; ChiaKuang Tsung | Zendy; YaWen Zhang | Zendy; Gábor A. Somorjai | Zendy

Open Access

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

Author(s) -

John N. Kuhn,

Wenyu Huang,

ChiaKuang Tsung,

YaWen Zhang,

Gábor A. Somorjai

Publication year - 2008

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja805050c

Subject(s) - chemistry , platinum , pyrrole , platinum nanoparticles , dispersity , mesoporous silica , particle size , nanoparticle , selectivity , mesoporous material , chemical engineering , catalysis , dendrimer , carbon fibers , particle (ecology) , nanotechnology , polymer chemistry , organic chemistry , composite material , materials science , oceanography , composite number , engineering , geology

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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