Pt/Au Alloys as Reduction Promoters for Co/TiO₂ Fischer-Tropsch Catalysts

Abstract:

Noble metals, such as platinum or gold, may promote the reduction of cobalt in supported cobalt catalysts either by direct contact or indirectly via hydrogen spill-over. The synthesis go gold nano-particles using THPC in the presence of a calcined Co/TiO₂-catalyst precursor results in a broadening of the gold particle size distribution possibly due to the association of gold with Co₃O₄. This was not observed for platinum and platinum-gold alloys synthesized in the same manner. Platinum-gold alloys are less effective than platinum as a reduction promoter, possibly due to the presence of gold on the surface of the alloy particles.

• Periodical: Advanced Materials Research (Volume 1019)
• Pages: 365-371
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1019.365
• Online since: October 2014
• Authors: Avela Kunene, Michael Claeys, Eric van Steen*
• Keywords: Cobalt, Fischer-Tropsch, Gold, Nano-Alloy, Platinum, Promoter, Reduction

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