Epitaxy-induced PtO_x-TiO₂ interfaces boost the reverse water-gas shift reaction

Area of Science:

• Materials Science
• Catalysis
• Chemical Engineering

Background:

• Precise control over metal-support interfaces is crucial but challenging in catalyst design.
• Existing catalysts often struggle with stability and efficiency at the interface.

Purpose of the Study:

• To develop a novel catalyst with an optimized metal-support interface for enhanced catalytic activity.
• To investigate the synergistic effects of interfacial species and oxygen vacancies in catalysis.

Main Methods:

• Fabrication of a Pt/PtOx/TiO2 catalyst utilizing an interfacial compatibility strategy.
• Characterization of the catalyst's epitaxial spreading structure and interfacial properties.
• Evaluation of the catalyst's performance in the Reverse Water-Gas Shift (RWGS) reaction.

Main Results:

• Successfully synthesized a Pt/PtOx/TiO2 catalyst with an epitaxial spreading structure.
• Identified stable interfacial PtOx species and abundant oxygen vacancies.
• Demonstrated enhanced catalytic activity in the RWGS reaction due to synergistic active centers.

Conclusions:

• The developed interfacial compatibility strategy enables precise construction of metal-support interfaces.
• The synergistic effect between PtOx species and oxygen vacancies is key to enhancing RWGS reaction performance.
• This approach offers a promising pathway for designing advanced heterogeneous catalysts.