Understanding and application of metal-support interactions in catalysts for CO-PROX

Area of Science:

• Catalysis
• Materials Science
• Electrochemistry

Background:

• Preferential oxidation of carbon monoxide (CO-PROX) is essential for hydrogen purification in proton exchange membrane fuel cells (PEMFCs).
• Supported metal catalysts are the primary choice for CO-PROX, with metal-support interactions (MSI) emerging as a critical factor.
• MSI links catalyst design with fundamental theoretical research in heterogeneous catalysis.

Purpose of the Study:

• To review the impact of MSI on the characteristics and catalytic behaviors of supported single atom, nanocluster, and nanoparticle catalysts.
• To highlight the role of MSI in electron transfer, chemical bonding, and active site encapsulation.
• To provide insights into rationally designing catalysts using MSI for enhanced activity, selectivity, and stability.

Main Methods:

• Literature review focusing on MSI in supported metal catalysts for CO-PROX.
• Analysis of MSI effects on catalyst properties (electron transfer, bonding, encapsulation).
• Discussion of MSI's role in catalyst design strategies.

Main Results:

• MSI significantly influences the electronic and structural properties of supported catalysts.
• Strong and electronic MSI affect the performance of single atom, nanocluster, and nanoparticle catalysts.
• MSI can be leveraged to tune catalyst activity, selectivity, and stability.

Conclusions:

• A comprehensive understanding of MSI is vital for developing advanced CO-PROX catalysts.
• Rational catalyst design via MSI optimization is crucial for efficient PEMFC operation.
• Future research should focus on further elucidating MSI mechanisms for improved catalyst performance.