Platinum-Nickel/L-zeolite Bimetallic Catalysts: Effect of Sulfur Exposure on Metal Particle Size and n-Hexane Aromatization Activity and Selectivity

Gustavo Larsen, Daniel E. Resasco, Vincent A. Durante, Jae Kim, Gary L. Haller

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Experimental evidence that Ni can be used to stablizie Pt particles supported in L-zeolite against deactivation by sulfur is presented. A series of Pt-Ni/L-zeolite bimetallic catalysts prepared by co-impregnation were tested for n-hexane aromatization and characterized by Extended X-ray Absorption Fine Structure (EXAFS), hydrogen chemisorption and Transmission Electron Microscopy (TEM) before and after sulfiding. It was found that bimetallic particles are significantly less subject of sulfur-induced particle growth than their monometallic (pt) counterpart. This mechanism of catalyst fouling is known to cause deterioration of Pt/L aromatization catalysts.

Original languageEnglish (US)
Pages (from-to)321-329
Number of pages9
JournalStudies in Surface Science and Catalysis
Volume83
Issue numberC
DOIs
StatePublished - Jan 1 1994

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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