Clarifying mechanisms and kinetics of programmable catalysis

Area of Science:

• Chemical kinetics
• Catalysis theory
• Computational chemistry

Background:

• Programmable catalysis aims to accelerate reaction rates by dynamically altering catalytic potential energy surfaces (PES).
• Theoretical studies are computationally intensive due to stiff differential equations governing PES cycling.
• Significant reduction in computational cost is needed for practical application and deeper understanding.

Purpose of the Study:

• To develop computationally efficient methods for studying programmable catalysis.
• To derive analytical solutions for understanding programmable catalysis mechanisms.
• To identify key catalyst properties for rate enhancement in complex systems.

Main Methods:

• Developed novel methods to reduce computational cost for finding limit cycles by over 10^8 times.
• Derived closed-form analytical solutions for didactic case studies.
• Generalized analytical frameworks to complex reaction networks, including CO oxidation on Pt (111).

Main Results:

• Achieved significant computational savings, enabling detailed physical insights.
• Identified two primary programmable catalysis mechanisms: quasi-static (high frequency) and stepwise (intermediate frequency).
• Exposed crucial catalyst properties required for enhanced rates and conversions.

Conclusions:

• Analytical descriptions of quasi-static and stepwise mechanisms are vital for understanding rate enhancement.
• The Sabatier principle's impact on programmable catalysis is clarified through these analytical frameworks.
• This work provides a foundation for designing more efficient catalytic systems using programmable catalysis.