Highly structured electrodes permit high operating currents to be achieved as well as enhanced selectivity, especially for the carbon dioxide reduction (CDR) reaction. An understanding of the origins of CDR selectivity is complicated by the intricate internal structure of high surface area electrodes, which may modify the microenvironment in which catalysis occurs. We report here enhanced faradaic efficiency of the reduction of CO
Zhu et al. (Thu,) studied this question.