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Passive NO Adsorption on Hydrothermally Aged Pd-Based Small-Pore Zeolites

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A Correction to this article was published on 02 January 2021

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Abstract

Pd-based small-pore zeolites with different framework structures (AEI, CHA and RTH) were synthesized by a facile incipient wetness impregnation method. The zeolites were utilized as low-temperature passive NOx adsorbers (PNA) for NOx storage before and after hydrothermal aging. It was found that 1 wt% Pd/AEI showed better PNA behavior than the 1 wt% Pd/CHA and Pd/RTH samples, regardless of hydrothermal aging at 750 and 800 ℃. The AEI zeolite has a three-dimensional but tortuous pore channel structure, which accelerated Pd dispersion at 750 ℃ but inhibited Pd aggregation at 800 ℃ when subjected to hydrothermal aging. Pd/CHA showed a slight increase in Pd dispersion at 750 ℃, but extensive Pd aggregation at 800 ℃ due to its straight and unhindered three-dimensional pore structure. The Pd species in Pd/RTH zeolite were prone to accumulation during hydrothermal aging due to the two-dimensional pore structure. Therefore, Pd/AEI can be utilized as an efficient and stable PNA after activation by mild hydrothermal aging treatment.

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  • 02 January 2021

    The original version of this article unfortunately contained an error. The authors would like to correct the error with this erratum.

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Acknowledgements

This work was financially supported by the National Science Foundation of China (21906172, 21637005).

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Authors and Affiliations

  1. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

    Yulong Shan, Yu Sun, Xiaoyan Shi, Yunbo Yu & Hong He

  2. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China

    Yaobin Li, Wenpo Shan, Yunbo Yu & Hong He

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yu Sun, Xiaoyan Shi, Yunbo Yu & Hong He

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  1. Yulong Shan
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  2. Yu Sun
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  7. Hong He
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Correspondence to Hong He.

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Shan, Y., Sun, Y., Li, Y. et al. Passive NO Adsorption on Hydrothermally Aged Pd-Based Small-Pore Zeolites. Top Catal 63, 944–953 (2020). https://doi.org/10.1007/s11244-020-01352-6

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