A series of core-shell In/H-Beta@Ce catalysts were synthesized by encapsulating In/H-Beta within an amorphous CeO shell and then evaluated for the selective catalytic reduction of NO by CH (CH-SCR) under challenging conditions with SO and HO. IB@Ce-2 achieved 57.7 % NO conversion at 625°C, representing a 23.0 % improvement over In/H-Beta (35.0 %) under similar no-optimized conditions. Under optimized conditions, it further achieved 97.5 % NO conversion at 600°C. Durability tests for IB@Ce-2 under optimized conditions showed NO conversion decreased from 97.5 % to 52.7 % over three cycles, while long-term operation maintained over 70 % conversion for 60 minutes. The amorphous CeO shell enhanced SO and HO tolerance by shielding InO active sites, facilitating redox cycling, and limiting sulfate formation. These findings highlight IB@Ce-2 as a durable and efficient candidate for NO abatement in natural gas vehicles and other real-world applications.
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