Promoted catalytic activity of CO oxidation at low temperatures by tuning ZnO morphology for optimized CuO/ZnO catalysts
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS(2023)
摘要
Catalytic oxidation of CO is an effective route to eliminate the pollution of automobile exhaust. Tuning the fraction of exposed polar and non-polar crystal facets in ZnO provides an effective strategy to tailor metal-oxide interfacial active sites. Herein, the morphology of ZnO support was tuned to alter the fraction of exposed (002) polar/(100), (101) non-polar facets. ZnO nanodisks and nanorods were prepared, followed by deposition of similar to 3.1 +/- 0.9 nm CuO nanoparticles. The impact of the ZnO morphology upon CuO deposition and catalytic activity towards CO oxidation were investigated. The CuO/ZnO derived from ZnO nanodisks (NDs) with the most exposed (002) polar plane exhibited more than 2 folds higher catalytic activity at 150 degrees C than that over CuO/ZnO with commercial ZnO support (CuO/ZnO-C), highlighting the morphology influence of ZnO. For its enhanced catalytic activity and cyclic stability, the CuO/ZnO-NDs could be a promising catalyst for CO oxidation.
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关键词
CO oxidation,ZnO nanodisks and nanorods,Morphology control,Copper oxide nanoparticles,CuO/ZnO catalysts
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