Journal
CATALYSIS LETTERS
Volume 138, Issue 3-4, Pages 143-147Publisher
SPRINGER
DOI: 10.1007/s10562-010-0392-2
Keywords
Hopcalite; Carbon monoxide; Low temperature oxidation; Gold
Categories
Funding
- Molecular Products
- EPSRC
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The addition of gold, by deposition precipitation, to a mixed copper manganese oxide catalyst (Hopcalite) has been studied for ambient temperature carbon monoxide oxidation. The deposition of gold on the catalyst surface enhanced the activity of the Hopcalite. The catalyst containing 1 wt% gold was the most active and showed higher activity than Hopcalite containing 0.5 and 2 wt% gold. It is expected that the introduction of gold will introduce new active sites to the Hopcalite that are associated with the gold nanoparticles. However, gold addition also increased the reducibility of the catalyst significantly compared to unmodified Hopcalite, and the most easily reduced catalyst was the most active, indicating that the lability of lattice oxygen was an important factor influencing activity.
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