Selective hydrogenation of acetylene over SBA-15 supported Au-Cu bimetallic catalysts

Jonathan William Lee, Xiaoyan Liu, Chung Yuan Mou

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Copper has been reported to be active in selective hydrogenation of acetylene but very selective to oligomers instead of ethylene. In this work, SBA-15 supported Cu-Au bimetallic nanoparticles are studied under different Cu/Au ratios and temperature. The addition of gold promotes the catalytic performance, reducing the amount of oligomers formed on the catalyst's surface. A synergistic effect between copper and gold is also displayed. The bimetallic catalyst with Cu/Au ratio at 1/3 has both better conversion and selectivity between 160-200 °C, providing the opportunities to lower the operating temperature (>200 °C) of copper. The synergy can be ascribed to the compromise of two factors: the electronic effect and the sintering resistance of bimetallic nanoparticles. Gold makes copper more electron-deficient, therefore, enhances the conversion. Besides, the particles remain highly dispersed and small (ca. 3 nm) when large amount of gold reduces the ensemble size of copper on the surface, minimizing C-C coupling reactions.

Original languageEnglish
Pages (from-to)907-914
Number of pages8
JournalJournal of the Chinese Chemical Society
Volume60
Issue number7
DOIs
Publication statusPublished - Jul 2013
Externally publishedYes

Keywords

  • Acetylene hydrogenation
  • Bimetallic
  • Copper
  • Gold
  • Nanoparticle

ASJC Scopus subject areas

  • Chemistry(all)

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