Pathways to enhance electrochemical CO₂ reduction identified through direct pore-level modeling.

ABSTRACT: Electrochemical conversion of CO₂ to fuels and valuable products is one pathway to reduce CO₂ emissions. Electrolyzers using gas diffusion electrodes (GDEs) show much higher current densities than aqueous phase electrolyzers, yet models for multi-physical transport remain relatively undeveloped, often relying on volume-averaged approximations. Many physical phenomena interact inside the GDE, which is a multiphase environment (gaseous reactants and products, liquid electrolyte, and solid catalyst), and a multiscale problem, where "pore-scale" phenomena affect observations at the "macro-scale". We present a direct (not volume-averaged) pore-level transport model featuring a liquid electrolyte domain and a gaseous domain coupled at the liquid-gas interface. Transport is

SUBMITTER: Johnson EF 

PROVIDER: S-EPMC10483485 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature