ELECTROCHEMICAL REDUCTION OF CO2 IN MICROSPORES

CO2 electroreduction was examined on high area nickel electrocatalysts supported on activated carbon fibers, which contain slit-shaped pores with widths on the order of nanometers. The current efficiency for CO 2 reduction to CO reached values of 70%. In contrast, much smaller amo unts of CO were generated for the same type of high area nickel cataly st supported on non-activated carbon fibers. The enhancement of the CO 2 reduction selectivity with the microporous support is thought to inc lude a nanospace effect, which gives rise to high pleasure-like effect s at ambient pressure.