Selective and stable CO₂ electroreduction at high rates via control of local H₂O/CO₂ ratio.

ABSTRACT: Controlling the concentrations of H₂O and CO₂ at the reaction interface is crucial for achieving efficient electrochemical CO₂ reduction. However, precise control of these variables during catalysis remains challenging, and the underlying mechanisms are not fully understood. Herein, guided by a multi-physics model, we demonstrate that tuning the local H₂O/CO₂ concentrations is achievable by thin polymer coatings on the catalyst surface. Beyond the often-explored hydrophobicity, polymer properties of gas permeability and water-uptake ability are even more critical for this purpose. With these insights, we achieve CO₂ reduction on copper with Faradaic efficiency exceeding 87% towards multi-carbon products at a high current den

SUBMITTER: Chen J 

PROVIDER: S-EPMC11246503 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature