Intermetallic NaAu2 as a heterogeneous catalyst for low-temperature CO oxidation.

نویسندگان

  • Chaoxian Xiao
  • Lin-Lin Wang
  • Raghu V Maligal-Ganesh
  • Volodymyr Smetana
  • Holly Walen
  • Patricia A Thiel
  • Gordon J Miller
  • Duane D Johnson
  • Wenyu Huang
چکیده

The enhanced stability and modified electronic structure of intermetallic compounds provide discovery of superior catalysts for chemical conversions with high activity, selectivity, and stability. We find that the intermetallic NaAu2 is an active catalyst for CO oxidation at low temperatures. From density functional theory calculations, a reaction mechanism is suggested to explain the observed low reaction barrier of CO oxidation by NaAu2, in which a CO molecule reacts directly with an adsorbed O2 to form an OOCO* intermediate. The presence of surface Na increases the binding energy of O2 and decreases the energy barrier of the transition states.

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عنوان ژورنال:
  • Journal of the American Chemical Society

دوره 135 26  شماره 

صفحات  -

تاریخ انتشار 2013