Recent Progress and Perspectives on Photocathode Materials for CO₂ Catalytic Reduction

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy
• Environmental Science

Background:

• Fossil fuel consumption and CO2 emissions drive an energy crisis and the greenhouse effect.
• Converting CO2 into fuels or chemicals using natural resources is a key sustainable strategy.
• Photoelectrochemical (PEC) catalysis integrates photocatalysis and electrocatalysis for efficient CO2 conversion.

Purpose of the Study:

• To review the fundamental principles and evaluation metrics of PEC CO2 reduction (PEC CO2RR).
• To summarize recent advancements in photocathode materials for CO2 reduction.
• To discuss structure-function relationships influencing material activity and selectivity.

Main Methods:

• Review of existing literature on PEC CO2RR.
• Analysis of typical photocathode materials.
• Discussion of structure-activity and structure-selectivity relationships.

Main Results:

• Introduction to PEC CO2RR principles and assessment criteria.
• Overview of recent progress in various photocathode materials.
• Exploration of material composition and structural impacts on performance.

Conclusions:

• PEC catalysis is a promising approach for CO2 conversion, leveraging solar energy.
• Understanding photocathode materials is crucial for optimizing PEC CO2RR.
• Further research is needed to address catalytic mechanisms and challenges in PEC CO2 reduction.