Fig. 4: Optical microscopic detection of Ag NPs-Skeleton, Ag NPs and Ag MPs during eCO2RR.

The bubble evolution process ascribed to CO exsolution produced on the electrodes of (a) Ag NPs-Skeleton, (b) Ag NPs and (c) Ag MPs.

The bubble evolution process ascribed to CO exsolution produced on the electrodes of (a) Ag NPs-Skeleton, (b) Ag NPs and (c) Ag MPs.