Robust palladium oxide nano-cluster catalysts using atomic ions and strong interactions for high-performance methane...

Area of Science:

• Materials Science
• Catalysis
• Surface Chemistry

Background:

• Optimizing metal catalyst structures is crucial for efficient surface reactions but hindered by poorly defined precursors and weak metal-support interactions.
• Palladium catalysts require specific tailoring for effective complete methane oxidation.

Purpose of the Study:

• To fabricate highly active and stable palladium oxide nano-cluster catalysts supported on SSZ-13.
• To investigate the role of strong metal-support interaction (SMSI) in enhancing catalyst performance for methane oxidation.

Main Methods:

• Utilized atomic ions to create Pd oxide nano-clusters on SSZ-13, inducing SMSI through steam treatment.
• Employed sequential CO reduction and O2 oxidation to form stable, anchored nano-clusters.
• Evaluated catalyst performance in bench-scale reactions using monolith catalysts.

Main Results:

• Successfully synthesized Pd oxide nano-clusters strongly anchored on SSZ-13 via SMSI.
• Achieved superior catalytic activity for methane oxidation due to enhanced metal-support interaction.
• Demonstrated catalyst robustness against irreversible deactivation and water-induced degradation.

Conclusions:

• Sequential treatment of Pd/SSZ-13 provides a viable strategy for tailoring metal structures for high-performance methane oxidation.
• The developed catalyst exhibits excellent potential for industrial methane abatement applications.