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Nickel and sulfate co-modified CeO 2 -ZrO 2 catalysts were prepared by sol-gel method. The catalysts were characterized by XRD, FTIR, XPS, NH 3 chemisorption and NH 3 -SCR activity tests. The results showed that the enhanced acidity of CeO 2 -ZrO 2 catalysts by nickel and sulfate co-modification was responsible for the broadened temperature window and...
Four kinds of CeO 2 -ZrO 2 mixed oxides, i.e., a physical mixture of ceria and zirconia (CZP), zirconia-coated ceria (ZCC), ceria-coated zirconia (CCZ) and a chemical mixture of ceria and zirconia (CZC), were prepared. The oxygen storage capacity (OSC) measurements at 500 °C were performed under transient and stationary reaction conditions. All the curves of CO 2 evolution...
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