PdIn/Al2O3 Intermetallic Catalyst: Structure and Catalytic Characteristics in Selective Hydrogenation of Acetylene

P. V. Markov, A. V. Bukhtiyarov, I. S. Mashkovsky, N. S. Smirnova, I. P. Prosvirin, Z. S. Vinokurov, M. A. Panafidin, G. N. Baeva, Ya V. Zubavichus, V. I. Bukhtiyarov, A. Yu Stakheev

Research output: Contribution to journalArticlepeer-review

Abstract

The structure and catalytic characteristics of a bimetallic catalyst containing Pd1In1 nanoparticles deposited on the surface of γ-Al2O3 were studied. The formation of intermetallic nanoparticles was determined by X-ray diffraction analysis and confirmed by X-ray photoelectron spectroscopy and IR spectroscopy of adsorbed CO. In the hydrogenation of acetylene in excess ethylene, PdIn/Al2O3 had significantly higher selectivity of ethylene formation (~86%) than monometallic Pd/Al2O3 (~35%). The high selectivity of PdIn/Al2O3 is explained by two factors: (1) the formation of monatomic Pd1 sites isolated from one another by In atoms and (2) the change in the electronic state of Pd atoms in the intermetallic nanoparticles.

Original languageEnglish
Pages (from-to)842-850
Number of pages9
JournalKinetics and Catalysis
Volume60
Issue number6
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • bimetallic catalysts
  • catalyst structure
  • gas-phase hydrogenation of acetylene
  • indium
  • intermetallics
  • isolated Pd sites
  • nanoparticles
  • palladium
  • LIQUID-PHASE HYDROGENATION
  • STABILITY
  • REACTIVITY
  • PART II
  • DEHYDROGENATION
  • ATOM PD SITES
  • SURFACE DYNAMICS
  • GA
  • SEMIHYDROGENATION
  • PD2GA

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