期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 42, 页码 18522-18526出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202009050
关键词
hydrothermal stability; metal-oxide interactions; methane combustion; palladium
资金
- National Key R&D Program of China [2016YFA0202801, 2017YFB0602200]
- National Natural Science Foundation of China [21403213, 21376236, 21725301, 21821004, 91645115, 21932002]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21040200, XDB17020100]
- Hundred Talents Programme of the Chinese Academy of Sciences
- Department of Science and Technology of Liaoning province [2015020086-101]
- DNL Cooperation fund, CAS [DNL180403]
- Tencent Foundation through the XPLORER PRIZE
Catalytic combustion is promising in removing trace amounts of CH(4)to address serious environmental concerns. Supported Pd-based catalysts are most effective but often suffer from low stability in applications owing to the water-vapor-induced sintering. Herein, we develop a universal strategy to prepare irreducible-oxide-modified Pd/MgAl(2)O(4)catalysts which show high activity and excellent stability against both hydrothemal aging at elevated temperatures and deactivation in long-term reaction under wet conditions. The addition of irreducible oxides inhibited the deep oxidation of Pd in the oxygen-rich conditions, which preserved not only the epitaxial structure but also a suitable active phase of Pd-PdO(x)on MgAl2O4, thus promoting both activity and stability. This work provides new insights into the effect of metal-oxide interaction on CH(4)combustion and offers an avenue to design hydrothermally stable and active combustion catalysts for industrial applications.
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