Lattice-Strain Engineering for Heterogenous Electrocatalytic Oxygen Evolution Reaction.

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• The oxygen evolution reaction (OER) is critical for energy applications like metal-air batteries and water splitting.
• High overpotential and sluggish kinetics due to inefficient electron transfer limit OER energy efficiency.
• Nanocatalyst surface properties are actively modified to enhance OER activity, selectivity, and stability.

Purpose of the Study:

• To review the fundamentals of OER and advancements in lattice-strain engineering for electrocatalysts.
• To elucidate the role of strain effects in optimizing OER using the d-band center descriptor.
• To highlight innovative strategies and the feedback mechanism between lattice strain and catalytic activity.

Main Methods:

• Review of existing literature on OER and lattice-strain engineering.
• Analysis of the d-band center as a descriptor for structure-activity relationships in strained catalysts.
• Categorization of electrocatalyst modulation strategies based on strain effects.

Main Results:

• Lattice-strain engineering offers a powerful method to tune the electronic and geometric configurations of metal sites in nanocatalysts.
• Precise regulation of lattice strain directly correlates with optimal OER activity.
• The d-band center effectively quantifies the impact of strain on catalytic surface interactions.

Conclusions:

• Strain engineering is pivotal for overcoming OER limitations and improving energy conversion efficiencies.
• Understanding the strain-activity feedback mechanism is crucial for designing next-generation electrocatalysts.
• Further research is needed to address practical challenges and explore future directions in strained electrocatalyst development.