Size-dependent sulfur poisoning of silica-supported monodisperse Pt nanoparticle hydrogenation catalysts

Lyndsey M. Baldyga, Selasi O. Blavo, Chun Hong Kuo, Chia Kuang Tsung, John N. Kuhn*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Colloidal techniques were used to synthesize monodisperse Pt nanoparticles of four distinct sizes between 2 and 7 nm before immobilization onto silica. Ethylene hydrogenation demonstrated structure-insensitive behavior with TOFs of ∼12 s-1 before poisoning. With thiophene being a strong binding adsorbate, TOFs decreased by orders of magnitude, and the poisoning-induced antipathetic structure sensitivity because thiophene adsorbed more strongly to the coordinatively unsaturated, as compared with coordinatively saturated, surfaces, and the degree of saturation increased with decreasing Pt size. This effort is part of a broader study in which structure sensitivity is analyzed for adsorbates in complex reaction networks.

Original languageEnglish
Pages (from-to)2626-2629
Number of pages4
JournalACS Catalysis
Issue number12
StatePublished - 7 Dec 2012


  • colloidal synthesis with size control
  • platinum
  • structure sensitivity
  • sulfur poisoning


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