Fig. 1: Schematic illustration of the different mechanisms.
From: Small PdCx interstitial compound for efficient acidic CO2 electroreduction to formic acid
a On a typical Pd surface, the C-O bond is easier to cleave, thus producing CO. b On a carbon infusion Pd surface, the Pd-O bond is weakened, thus producing HCOOH. (Green: Pd, gray: C, red: O and white: H, same as below.).
