Fig. 6: Mechanistic insights into the QA-OH synergy with the demonstration of pure-water MEA.
From: Metal-organic double layer to stabilize selective multi-carbon electrosynthesis
a, b Free energy change as a function of reaction coordinates for the reaction: *CO + *CO → *OCCO under −0.9 VRHE and pH 14 on (a) Cu/PVAPA/H2O and (b) Cu/PVAQA/H2O. Insets are the atomic structures of the initial (IS), transition (TS) and final states (FS) for the process. c Schematics to illustrate the synergic role of ammoniums and hydroxyls in the MODL for boosting multi-carbon synthesis. d Summary of the in situ FT-IR spectra between 1350 and 1700 cm−1 for Cu/PVAPA54 and Cu/PVAQAx. e Demonstration of pure-water MEA with CP/Cu/PVAQA54 at 200 mA cm−2. The potentials presented in Fig. 6d and the cell voltages shown in (e) were recorded without iR correction.
