Dielectric barrier discharge plasma synthesis of Ag/γ-Al2O3 catalysts for catalytic oxidation of CO

Yunming TAO; Yuebing XU; Kuan CHANG; Meiling CHEN; Sergey A STAROSTIN; Hujun XU; Liangliang LIN

doi:10.1088/2058-6272/acc14c

Plasma Science and Technology > 2023 > 25(8): 085504. > DOI: 10.1088/2058-6272/acc14c

Yunming TAO, Yuebing XU, Kuan CHANG, Meiling CHEN, Sergey A STAROSTIN, Hujun XU, Liangliang LIN. Dielectric barrier discharge plasma synthesis of Ag/γ-Al₂O₃ catalysts for catalytic oxidation of CO[J]. Plasma Science and Technology, 2023, 25(8): 085504. DOI: 10.1088/2058-6272/acc14c

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Dielectric barrier discharge plasma synthesis of Ag/γ-Al₂O₃ catalysts for catalytic oxidation of CO

1.
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
2.
FUJIFILM Manufacturing Europe, Tilburg Research Labs, Tilburg 5047 TK, Netherlands

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Corresponding author:
Lin Liangliang, E-mail: linliangliang@jiangnan.edu.cn
Received Date: December 17, 2022
Revised Date: February 27, 2023
Accepted Date: March 02, 2023
Available Online: December 05, 2023
Published Date: April 18, 2023

Graphical Abstract

Abstract

Abstract

In this study, Ag/γ-Al₂O₃ catalysts were synthesized by an Ar dielectric barrier discharge plasma using silver nitrate as the Ag source and γ-alumina (γ-Al₂O₃) as the support. It is revealed that plasma can reduce silver ions to generate crystalline silver nanoparticles (AgNPs) of good dispersion and uniformity on the alumina surface, leading to the formation of Ag/γ-Al₂O₃ catalysts in a green manner without traditional chemical reductants. Ag/γ-Al₂O₃ exhibited good catalytic activity and stability in CO oxidation reactions, and the activity increased with increase in the Ag content. For catalysts with more than 2 wt% Ag, 100% CO conversion can be achieved at 300 °C. The catalytic activity of the Ag/γ-Al₂O₃ catalysts is also closely related to the size of the γ-alumina, where Ag/nano-γ-Al₂O₃ catalysts demonstrate better performance than Ag/micro-γ-Al₂O₃ catalysts with the same Ag content. In addition, the catalytic properties of plasma-generated Ag/nano-γ-Al₂O₃ (Ag/γ-Al₂O₃-P) catalysts were compared with those of Ag/nano-γ-Al₂O₃ catalysts prepared by the traditional calcination approach (Ag/γ-Al₂O₃-C), with the plasma-generated samples demonstrating better overall performance. This simple, rapid and green plasma process is considered to be applicable for the synthesis of diverse noble metal-based catalysts.
- DBD plasma,
- plasma nanofabrication,
- noble metal nanoparticles,
- CO oxidation,
- Ag/γ-Al₂O₃ catalysts

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Acknowledgments

We would like to acknowledge financial support from National Natural Science Foundation of China (Nos. 52004102 and 22078125), Postdoctoral Science Foundation of China (No. 2021M690068), Fundamental Research Funds for the Central Universities (Nos. JUSRP221018 and JUSRP622038), Key Laboratory of Green Cleaning Technology and Detergent of Zhejiang Province (No. Q202204) and Open Project of Key Laboratory of Green Chemical Engineering Process of Ministry of Education (No. GCP202112).

Supplementary material for this article is available https://doi.org/10.1088/2058-6272/acc14c

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