Citation: Ce Bian, Dan Li, Qian Liu, Shoute Zhang, Lei Pang, Zhu Luo, Yanbing Guo, Zhen Chen, Tao Li. Recent progress of Pd/zeolite as passive NO_x adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects[J]. Chinese Chemical Letters, ;2022, 33(3): 1169-1179. doi: 10.1016/j.cclet.2021.07.066 shu

Recent progress of Pd/zeolite as passive NO_x adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects

Ce Bian ^a ,
Dan Li ^a ,
Qian Liu ^a ,
Shoute Zhang ^a ,
Lei Pang ^b ,
Zhu Luo ^c ,
Yanbing Guo ^c ,
Zhen Chen ^{a, *,} ,
Tao Li ^{a, *,}

a.
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
b.
DongFeng Trucks R & D Center, Wuhan 430056, China
c.
Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, China

zhende_888@126.com

taoli@hust.edu.cn

Received Date: 7 February 2021
Revised Date: 21 April 2021
Accepted Date: 30 July 2021
Available Online: 5 August 2021

Figures(10)

Due to the technology limitation and inferior deNO_x efficiency of urea selective catalytic reduction (SCR) catalysts at low temperatures, passive NO_x adsorber (PNA) for decrease of NO_x, CO and hydrocarbons (HCs) during "cold start" of vehicles was proposed to meet the further tighten NO_x emission regulations in future. Among them, Pd modified zeolite PNA materials have received more attention because of their excellent NO_x storage capacity, anti-poisoning and hydrothermal stability and since Pd/zeolite PNA was proposed, a variety of advanced characterization methods have been applied to investigate its adsorption behavior and structure-performance relationship. The comprehension of the active sites and adsorption chemistry of Pd/zeolite PNA was also significantly improved. However, there are few reviews that systematically summarize the recent progress and application challenges in atomic-level understanding of this material. In this review, we summarized the latest research progress of Pd/zeolite PNA, including active adsorption sites, adsorption mechanism, material physicochemical properties, preparation methods, storage and release performance and structure-performance relationships. In addition, the deactivation challenges faced by Pd/zeolite PNA in practical applications, such as chemical poisoning, high temperature hydrothermal aging deactivation, etc., were also discussed at the micro-level, and some possible effective countermeasures are given. Besides, some possible improvements and research hotspots were put forward, which could be helpful for designing and constructing more efficient PNA materials for meeting the ultra-low NO_x emission regulation in the future.
- Emission control,
- Pd/zeolite,
- Passive NO_x adsorber,
- NO_x storage,
- Cold start
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Recent progress of Pd/zeolite as passive NOx adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects

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通讯作者: 陈斌, bchen63@163.com

Recent progress of Pd/zeolite as passive NO_x adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects