An Efficient Implementation of the ESM-RISM Method for Simulating Electrode/Electrolyte Interfaces.

Area of Science:

• Computational Chemistry
• Physical Chemistry
• Materials Science

Background:

• The effective screening medium reference interaction site model (ESM-RISM) extends 3D-RISM theory for electrified interfaces.
• Original ESM-RISM had computational cost and approximation issues compared to 3D-RISM.

Purpose of the Study:

• To present an efficient and analytically improved implementation of ESM-RISM.
• To address limitations in accuracy and computational cost of the original ESM-RISM theory.

Main Methods:

• Analytical reformulation of the Laue-represented RISM equation.
• Implementation applied to a hydrated water molecule and a Pt(111)/HCl aqueous interface.
• Reduced computational complexity from O(N^4/3) to O(N log N).

Main Results:

• The new implementation resolves approximation differences between ESM-RISM and 3D-RISM.
• Significant reduction in computational time to achieve convergence.
• Accurate capture of electrified interface properties.

Conclusions:

• The enhanced ESM-RISM implementation offers improved accuracy and efficiency.
• This method provides a more computationally feasible approach for studying atomistic phenomena at electrified interfaces.
• The study validates the method for both bulk solutions and complex interfaces.