Citation: Jianning Zhang, Yihuai Zhang, Guoxin Ma, Jingchen Zhao, Tao Zhang, Jian Liu. Enhancing hydrothermal stability in Cu/SSZ-13 catalyst for diesel SCR applications through a novel core-shell structure[J]. Chinese Chemical Letters, ;2025, 36(7): 110516. doi: 10.1016/j.cclet.2024.110516 shu

Enhancing hydrothermal stability in Cu/SSZ-13 catalyst for diesel SCR applications through a novel core-shell structure

Jianning Zhang ^{a, b} ,
Yihuai Zhang ^b ,
Guoxin Ma ^b ,
Jingchen Zhao ^{a, b} ,
Tao Zhang ^{b, *,} ,
Jian Liu ^{a, c, *,}

a.
College of Science, China University of Petroleum, Beijing 102249, China
b.
School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China
c.
Laboratory of Heavy Oil Processing at Karamay, China University of Petroleum-Beijing at Karamay, Karamay 834000, China

zhangt@ruc.edu.cn

Liujian@cup.edu.cn

Received Date: 23 April 2024
Revised Date: 9 August 2024
Accepted Date: 28 September 2024
Available Online: 30 September 2024

Figures(5)

This study introduces a novel core-shell structured composite, Cu/SSZ-13@CeO₂, designed to boost the catalyst’s resistance to hydrothermal conditions. Characterization results reveal that encapsulating Cu/SSZ-13 with a ceria (CeO₂) shell markedly enhances hydrothermal stability by maintaining the functionality of [Cu(OH)]⁺ active sites and averting their deactivation. Furthermore, the CeO₂ shell substantially prevents the loss of crucial Lewis and Brønsted acid sites, essential for effective SCR performance. A significant finding is the formation of a "Ce−O−Al" bond between the CeO₂ shell and the Cu/SSZ-13 core, which plays a crucial role in reinforcing the structural stability of the zeolite framework. These insights contribute significantly to the development of robust anti-hydrothermal aging catalysts for mobile SCR applications, heralding the advancement of more efficient SCR catalyst technologies.
- Diesel emission,
- NO_x,
- Hydrothermal aging,
- Cu/SSZ-13,
- Core-shell catalysts
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