Controlled Electrochemical Barrier Calculations without Potential Control.

Area of Science:

• Electrochemistry
• Computational Chemistry
• Materials Science

Background:

• Electrochemical activation energies are crucial for understanding catalytic activity at interfaces.
• Accurate computation of these energies under applied potentials is challenging with existing methods.

Purpose of the Study:

• To develop novel computational methods for determining electrochemical activation energies.
• To achieve accuracy comparable to constant potential grand canonical approaches without explicit potentiostat use.

Main Methods:

• Employing Legendre transforms of constant charge, canonical reaction paths.
• Introducing straightforward approximations to reduce computational cost and complexity.
• Analytically including geometric response alongside electronic degrees of freedom.

Main Results:

• Developed a new computational approach for electrochemical barriers.
• Achieved accuracy comparable to established methods.
• Demonstrated significant reduction in computational cost and complexity.
• Highlighted the importance of geometric factors in barrier evaluation.

Conclusions:

• The new Legendre transform-based methods provide an efficient and accurate way to compute electrochemical barriers.
• These methods simplify the process by removing the need for a potentiostat.
• Incorporating both electronic and geometric responses is vital for accurate electrochemical barrier calculations.