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The deactivation mechanism of alkali metals on the SCR catalyst of Ce/TiO2 was investigated by TPD and DRIFT studies. It could be found that the addition of Na or K on Ce/TiO2 catalyst would restrict the adsorption of NH3, accompanied by the generation of new sites for the adsorption of NOx species. But the new-absorbed NOx species were not active in the NH3-SCR reaction. The results of in situ DRIFT...
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