Effect of In Content on Three-way Catalytic Performance of In-Ag-Ce-O/γ-Al_2O_3 Catalyst AITranslate

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Chinese Library Classification Number:O643.361[理学—物理化学]

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Three-way catalyst was prepared by isovolumetric impregnation with the scattered metal In,the transition metal Ag and the rare earth metal Ce as the active components andγ-Al2O3 as the carrier.The microstructure of the catalyst was characterized by XRD,BET,SEM and N2 adsorption technology.The influence of In content on catalyst performance was also investigated.The results show that the catalyst activity can be improved after In addition resulting in AgInO2 phase appearing in its XRD pattern.However,the catalyst activity gradually decreases with the increase of In content.The results from BET and SEM show that the increase of In content causes aggregation of the active ingredients to reduce their dispersion degree and decrease of the specific surface area of the catalyst to reduce its catalytic activity.In-Ag-Ce-O/γ-Al2O3 catalyst has the strongest three-way catalytic activity when its active ingredient In content is 2%.