Nanoporous Cu/Ni oxide composites: efficient catalysts for electrochemical reduction of CO2 in aqueous electrolytes.

We developed a route to prepare nanoporous Cu/Ni oxide composites. It was discovered that the Cu/Ni oxide composites were very efficient electrocatalysts for CO2 reduction to formate in aqueous electrolytes. The excellent performance resulted mainly from the porous structure, synergistic effect of the two oxides, and low charge transfer resistance. [ABSTRACT FROM AUTHOR]