Cu2O-based catalysts applied for electrocatalytic CO2 reduction: a review

Abstract

The application of sustainable energy-driven electrocatalytic carbon dioxide reduction reaction (CO₂RR) technology enables the synthesis of valuable chemicals and feedstocks. This offers a promising pathway to effectively reduce greenhouse gas emissions associated with fossil fuels. Cu₂O-based electrocatalysts have been widely investigated owing to their cost-effective, environmentally friendly, and structurally tunable nature. This article provides a comprehensive review of recent advancements in the electrocatalytic reduction of carbon dioxide using Cu₂O-based catalysts with a focus on the properties, structure, and synthesis of Cu₂O. It summarizes the performance of Cu₂O-based catalysts in CO₂ reduction, discusses several optimization strategies to enhance their stability and redox capabilities and outlines their application in CO₂ reduction. Finally, the opportunities, challenges and research directions associated with Cu₂O-based catalysts in the field of electrocatalytic CO₂ reduction are identified, providing guidance for their broad application in the energy and environment sectors.