Long-Range Redox and Water Activation at Metal-Water Interfaces with Ferroelectric Ordering

Area of Science:

• Physical Chemistry
• Surface Science
• Computational Materials Science

Background:

• The molecular structure of water significantly impacts electron transfer and redox reactions at metal-water interfaces.
• Accurate ab initio molecular dynamics (AIMD) simulations are computationally expensive for studying these interfaces.
• Static simulations with ordered water layers offer a cost-effective alternative for explicit molecular interaction analysis.

Purpose of the Study:

• To investigate the coupling between electronic and structural properties at ferroelectrically ordered metal-water interfaces.
• To understand the role of ordered solvent dipole layers in electron transfer phenomena.
• To assess the limitations of the ordered interface model and its implications for ferroelectric ice.

Main Methods:

• Utilizing static simulations with ordered layers of water molecules.
• Analyzing the electronic structure and charge transfer at metal-water interfaces.
• Examining the influence of increasing numbers of ice-like water layers.

Main Results:

• Observed long-range electron transfer between the metal's Fermi level and the outermost water molecules' HOMO/LUMO states.
• Demonstrated mediation of electron transfer by ordered solvent dipole layers.
• Revealed a strong coupling between ferroelectric ordering and long-range auto-redox phenomena.

Conclusions:

• The ordered interface model has limitations in describing interfacial phenomena.
• Ferroelectric ordering in dipolar solvent structures strongly couples with long-range auto-redox processes.
• Findings provide insights into the stability of ferroelectric ice and water activation in electrocatalysis.