High‐Current‐Density Acidic CO2 Electroreduction to Formic Acid Enabled by Multiscale Microenvironment Regulation Over Defect‐Rich Sn/SnOx
ABSTRACT Acidic CO2 electrolysis to formic acid circumvents carbonate formation and enables direct product recovery, yet is hindered by severe competition between formate‐producing *OCHO and hydrogen‐producing *H intermediates. Here, we develop a hierarchical site‐solvation‐transport regulation strategy to direct this...