Electrochemically Driven Formation of Sponge-Like Porous Silver Nanocubes Toward Efficient CO Electroreduction to CO.

Electrochemical conversion of CO into valuable products by utilizing renewable electricity is a thriving research field. For electrochemical reduction of CO to CO, uniform sponge-like porous Ag nanocubes (SPC-Ag) integrated on carbon paper are prepared by using an electrochemically driven method. The SPC-Ag has a 3 D porous structure and a large specific surface area, which affords abundant active sites for the CO reduction reaction (CO RR), as well as reducing impedance to accelerate the CO RR kinetics. This distinctive organization affords SPC-Ag with outstanding electrocatalytic performance for CO reduction to CO. High faradaic efficiency (>90 %) and large partial current density for CO with excellent durability are observed in a wide potential window, with a maximum value of 93 % at -0.9 V versus reversible hydrogen electrode.