fig4

Figure 4. (A) Schematic of zero-gap electrolyzer using gas diffusion electrode technologies. Modified with permission from ref.^[81] (Copyright 2019 Science Publishing Group). (B) Stacked and scalable microfluidic redox-neutral electrochemistry flow cell. Modified with permission from ref.^[82] (Copyright 2020 Science Publishing Group). (C) A practical flow cell to convert CO₂ into ethylene oxide. Modified with permission from ref.^[83] (Copyright 2020 Science Publishing Group).