Electrifying model catalysts for understanding electrocatalytic reactions in liquid electrolytes

Area of Science:

• Materials Science
• Electrochemistry
• Surface Science

Background:

• Electrocatalysis is crucial for renewable energy storage and conversion.
• Fundamental understanding of electrocatalysis lags behind heterogeneous catalysis.
• Electrification of chemical production is a future trend.

Purpose of the Study:

• To develop a new strategy for fundamental studies of electrocatalytic materials.
• To 'electrify' complex oxide model catalysts for liquid electrolyte studies.
• To advance the understanding of electrocatalytic processes.

Main Methods:

• Utilizing surface science techniques to create atomically defined complex oxide model catalysts.
• Transferring these model catalysts into an electrochemical environment.
• Preserving the atomic surface structure during the transfer process.

Main Results:

• Demonstrated the feasibility of electrifying surface science model catalysts.
• Investigated particle size effects in electrocatalysis.
• Identified novel metal-support interactions stabilizing oxidized platinum.
• Discovered a synergistic reaction pathway involving metallic and oxidized platinum.

Conclusions:

• The proposed 'electrification' strategy advances fundamental electrocatalysis research.
• Atomically defined model electrodes provide systematic approaches for studying electrocatalytic reactions.
• New insights into metal-support interactions offer pathways for designing advanced electrocatalysts.