A Hydrothermally Stable Irreducible Oxide-Modified Pd/MgAl2O4Catalyst for Methane Combustion
- 12 October 2020
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 59 (42), 18522-18526
- https://doi.org/10.1002/anie.202009050
Abstract
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.Keywords
Funding Information
- National Natural Science Foundation of China (21403213, 21376236, 21725301, 21821004, 91645115, 21932002)
- Department of Science and Technology of Liaoning Province (2015020086-101)
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