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Updated: Jun 2, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Core-shell In/H-Beta@Ce catalyst with enhanced sulfur and water tolerance for selective catalytic reduction of NOx by
François Nkinahamira1, Senlin Sun1, Rongshu Zhu1
1State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, PR China.
Abstract:
A series of core-shell In/H-Beta@Ce catalysts were synthesized by encapsulating In/H-Beta within an amorphous CeO2 shell and then evaluated for the selective catalytic reduction of NOx by CH4 (CH4-SCR) under challenging conditions with SO2 and H2O. IB@Ce-2 achieved 57.7 % NOx 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 % NOx conversion at 600°C. Durability tests for IB@Ce-2 under optimized conditions showed NOx conversion decreased from 97.5 % to 52.7 % over three cycles, while long-term operation maintained over 70 % conversion for 60 minutes. The amorphous CeO2 shell enhanced SO2 and H2O 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 NOx abatement in natural gas vehicles and other real-world applications.
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