Potassium has a deactivation effect on Cu-SSZ-13 catalyst for selective catalytic reduction of NO with NH₃ (NH₃-SCR). It was demonstrated that the modification of Cu-SSZ-13 catalysts by Ce could improve its K resistance. The characterization of NH₃-TPD and H₂-TPR suggested that the introduction of Ce on Cu-SSZ-13 could improve its surface acidity and redox ability. Moreover, the content of Cu²⁺ and chemisorbed oxygen were markedly restored under the situation that Ce and K elements were coexistent on catalyst surface. The synergetic effect between Ce and Cu might be the major reason for the great K resistance and the excellent SCR performance.

钾对Cu-SSZ-13催化剂具有减活作用，用于用NH ₃（NH ₃ -SCR）选择性催化还原NO 。结果表明，铈对Cu-SSZ-13催化剂的改性可以提高其耐K性能。NH ₃ -TPD和H ₂ -TPR的表征表明，将Ce引入Cu-SSZ-13可以提高其表面酸度和氧化还原能力。此外，在催化剂表面上同时存在Ce和K元素的情况下，Cu ²⁺和化学吸附的氧的含量得以显着恢复。Ce和Cu之间的协同作用可能是K抗性和SCR性能优异的主要原因。