Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 12, Pages 3210-3216Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c00181
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) [NRF-2016R1A5A1009592]
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The study aims to reveal the mobility-dependent SCR reaction by controlling Cu species with different ion mobilities in Cu-SSZ-13. The results indicate that enhanced ion mobility leads to improved NH3-SCR activity, providing insights for designing rational catalysts by tuning ion mobility.
Selective catalytic reduction of NOx with NH3 (NH3-SCR) in Cu-SSZ-13 has been proposed to have a unique homogeneouslike mechanism governed by the spatial proximity of mobile Cu ions. Among factors that determine the proximity, the effect of ion density on the SCR reaction is well established; however, it has not been verified how the different mobility of the Cu ion influences the SCR reaction. Herein, we try to reveal the mobility-dependent SCR reaction by controlling the Cu species with different ion mobilities in Cu-SSZ-13. Since the reaction kinetics is governed by the diffusion of Cu ions, the Cu ion mobility determines the reactivity of the Cu-SSZ-13. In terms of this correlation, enhanced ion mobility leads to improved NH3-SCR activity. These findings help understand the behavior of Cu ions in Cu-SSZ-13 under a catalytic reaction and provide insights to design rational catalysts by tuning the ion mobility.
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