Robust palladium oxide nano-cluster catalysts using atomic ions and strong interactions for high-performance methane oxidation.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39333084.
- Also identified by DOI 10.1038/s41467-024-52698-4 and PMC identifier 11436890.
- Licence recorded as CC BY-NC-ND.
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Abstract
Optimizing metal catalyst structures to achieve desired states is vital for efficient surface reactions, yet remains challenging due to the lack of well-defined precursor materials and weak metal-support interaction. Palladium-based catalysts, when not properly tailored for complete methane oxidation exhibit insufficient performance. Herein, we fabricate Pd oxide nano-clusters supported on SSZ-13 using atomic ions with strong metal-support interaction (SMSI). Steam treatment of Pd/SSZ-13 transforms Pd particles into ions and induces SMSI. Subsequently, CO reduction and O<sub>2</sub> oxidation yield mildly sintered Pd oxide nano-clusters firmly anchored on extra-framework Al<sub>penta</sub> sites of SSZ-13, facilitating superior activity. The robustness from SMSI prevents irreversible deactivation, and water-resistance by complete dehydration suppresses reversible degradation in wet conditions. This catalyst exhibits high performance in bench-scale reactions using monolith catalysts, ensuring applicability for industrial methane abatement. The results demonstrate that sequential treatment to Pd/SSZ-13 offers a promising approach for tailoring metal structures to enable high-performance methane oxidation.