Okumura et al. prepared a series of alumina-immobilized
nano-gold catalysts with different methods and tested their
activity in 1,3-butadiene hydrogenation.58 Among all the catalysts
Au/Al2O3 prepared with the depositionprecipitation
method (DP) exhibited the best performance. Conversion of
1,3-butadiene was ∼100%, and good selectivity to 1-butene was
obtained, Figure 2, which was normally >60%. The results
suggested that hydrogenation of 1,3-butadiene over Au catalysts
was somewhat insensitive to the Au particle size and composition
of metal oxide support.
Piccolo et al.59 reported that gold as an additive can promote
the catalytic efficiency of Pd in the selective hydrogenation of 1,3-
butadiene. For comparison, several catalysts including Au(111),
PdAu(111), PdAu(110), and Pd(111) were prepared. All
catalysts were characterized by LEED, AES, and LEIS. The study
revealed that the bimetallic catalyst could improve the selectivity
to butenes effectively, which reached ∼100% on the Pd70Au30-
(111) lattice plane. Gold may favor butene desorption from
catalyst surface.
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