Electrochemical Carbon Dioxide Reduction to Methanol on Copper‐Based Catalysts: Mechanistic Insights and Industrial Prospects

TL;DR

This review explores how copper-based catalysts can efficiently convert CO2 into methanol using electrochemical methods, with a focus on design, mechanisms, and industrial feasibility.

Contribution

The paper integrates mechanistic insights, catalyst design, and techno-economic analysis to guide the development of Cu-based electrocatalysts for CO2-to-methanol conversion.

Findings

Copper-based catalysts show promise for selective CO2-to-methanol conversion.

Structure-activity relationships and intermediate stabilization are key to improving selectivity.

Challenges in upscaling include stability and integration with renewable energy systems.

Abstract

Electrochemical CO2 reduction (ECO2R) offers a promising route to convert CO2 into high‐value‐added chemicals using renewable energy. Among the diverse ECO2R products, the selective conversion of CO2 to methanol (CH3OH) holds significant industrial importance as a fuel and chemical feedstock. This review provides a comprehensive overview of recent progress in Copper (Cu)‐based catalysts for selective ECO2R to CH3OH. Key advancements in catalyst design and synthesis are discussed, followed by mechanistic insights obtained through computational modeling and advanced characterization techniques. Special focus is given to the structure‐activity relationship that controls CH3OH selectivity, disclosing the importance of intermediate stabilization and electronic structure tuning. Further, state‐of‐the‐art Cu‐based materials and benchmarking their performances under various operating conditions, including the role of electrolyzer configurations, electrolytes, and ion‐exchange membranes, is summarized. Moreover, we analyze challenges in upscaling, such as stability, selectivity under high current densities, and integration with renewable energy sources. Besides, the potential of tandem and hybrid systems to improve reaction pathways is also emphasized. Finally, techno‐economic considerations are explored to evaluate the feasibility of large‐scale CH3OH production. By combining fundamental understanding with practical implementation, this review provides strategic direction toward the rational design of Cu‐based electrocatalysts and the development of commercially viable ECO2R systems for sustainable CH3OH synthesis.

This review presents a focused and integrated perspective on copper‐based catalysts for the selective electrochemical reduction of CO2 to methanol. It elucidates active site dynamics, mechanistic pathways, and structure–activity relationships, while connecting fundamental insights with catalyst design, reactor engineering, and techno‐economic considerations to guide the development of commercially viable, renewable‐energy‐driven methanol production technologies.

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