Gold-Containing Bimetallic Catalysts

The effect of adding gold to the Cu/ZnO-A Os catalyst has not yet been investigated. 

Catalyst Handbook (M. Twigg, ed.), 2nd edn., Wolfe Publ. Ltd., London, 1989. 

Heterogeneous Catalysis Principles and Applications, Clarendon Press, Oxford, 1987. 

Farrauto and C.H. Bartholomew, Fundamentals of Catalytic Processes, Chapman and Hall, London, 1997, Ch. 6. 

Andreeva, V. Idakiev, T. Tabakova, L.I. Ilieva, P. Falaras, A. Bourlinos, A. Travlos, Catal. Today 72 (2002) 51. 

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The methods used for preparing gold-containing bimetallic catalysts may be divided into three main classes (i) the methods that do not involve interaction between the two metal precursors in solution (Section 4.6.2) (ii) those that involve sequences of surface reactions designed to create... 

Preparation of Supported Bimetallic Catalysts Containing Gold... 

The review is broken into three broad sections, each containing three separate topics. The first section highlights three dramatic successes in the application of DFT to heterogeneous catalysis, followed by a discussion of the accuracy of DFT. The second section reviews three areas within heterogeneous catalysis that have attracted large volumes of theoretical effort in recent years, namely ab initio thermodynamics, the catalytic activity of nanoclusters of gold, and the development of bimetallic catalysts. The third section provides recent... 

Bimetallic colloids containing gold and palladium or platinum have been deposited onto carbon or graphite for use as catalysts for the selective oxidation of organic compounds52 (Section 8.3), in the same way as for pure gold colloids (Section 4.6). 

An infrared study of CO adsorption on Ru-Au supported on magnesia suggested that this bimetallic behaves differently from Ru-Cu, with no evidence of Au segregation at the cluster surface, (nor separate Au clusters although ruthenium and gold are practically immiscible in the bulk). At temperatures below 383 K where the reaction between cyclopropane and hydrogen adopted routes to propane or methane + ethane, no interaction between Au and Ru containing up to 36% Au was evident from the kinetic parameters.However, a more complete examination (unpublished) of these catalysts by XPS, EXAFS, SAXS, and other techniques has been made and it is believed that the surface contained Ru atoms only. 

Also, Marsh and co-workers [145] showed that gold on cobalt oxide particles, supported on a mechanical mixture of zirconia-stabilised ceria, zirconia and titania remains active in a gas stream containing 15 ppm SO2. Haruta and co-workers [207] found that although the low-temperature CO oxidation activity of Ti02-supported Au can be inhibited by exposure to SO2, the effect on the activity for the oxidation of H2 or propane is quite small. Venezia and co-workers [208] reported that bimetallic Pd-Au catalysts supported on silica/alumina are resistant to sulphur poisoning (up to 113 ppm S in the form of dibenzothiophene) in the simultaneous hydrogenation of toluene and naphthalene at 523 K. 

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