Chen, Xiaomai, Shi, Xuefeng, Chen, Peirong, Liu, Bowen, Liu, Meiyin, Chen, Longwen, Ye, Daiqi, Tu, Xin 
ORCID: 0000-0002-6376-0897, Fan, Wei and Wu, Junliang
(2023)
Unlocking High-Efficiency Methane Oxidation with Bimetallic Pd–Ce Catalysts under Zeolite Confinement.
ACS Environmental Au, 3 (4).
pp. 223-232.
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Abstract
Catalytic complete oxidation is an efficient approach to reducing methane emissions, a significant contributor to global warming. This approach requires active catalysts that are highly resistant to sintering and water vapor. In this work, we demonstrate that Pd nanoparticles confined within silicalite-1 zeolites (Pd@S-1), fabricated using a facile in situ encapsulation strategy, are highly active and stable in catalyzing methane oxidation and are superior to those supported on the S-1 surface due to a confinement effect. The activity of the confined Pd catalysts was further improved by co-confining a suitable amount of Ce within the S-1 zeolite (PdCe<sub>0.4</sub>@S-1), which is attributed to confinement-reinforced Pd-Ce interactions that promote the formation of oxygen vacancies and highly reactive oxygen species. Furthermore, the introduction of Ce improves the hydrophobicity of the S-1 zeolite and, by forming Pd-Ce mixed oxides, inhibits the transformation of the active PdO phase to inactive Pd(OH)<sub>2</sub> species. Overall, the bimetallic PdCe<sub>0.4</sub>@S-1 catalyst delivers exceptional outstanding activity and durability in complete methane oxidation, even in the presence of water vapor. This study may provide new prospects for the rational design of high-performance and durable Pd catalysts for complete methane oxidation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | catalytic methane oxidation, silicalite-1zeolite, bimetallic Pd catalysts, confinement, Pd-Ceinteraction |
| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 31 May 2023 10:35 |
| Last Modified: | 26 Jul 2023 18:51 |
| DOI: | 10.1021/acsenvironau.3c00008 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3170761 |
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