%0 Journal Article
%T Copper nanocavities confine intermediates for efficient electrosynthesis of C3 alcohol fuels from carbon monoxide
%J -
%D 2018
%R https://doi.org/10.1038/s41929-018-0168-4
%X The electrosynthesis of higher-order alcohols from carbon dioxide and carbon monoxide addresses the need for the long-term storage of renewable electricity; unfortunately, the present-day performance remains below what is needed for practical applications. Here we report a catalyst design strategy that promotes C3 formation via the nanoconfinement of C2 intermediates, and thereby promotes C2:C1 coupling inside a reactive nanocavity. We first employed finite-element method simulations to assess the potential for the retention and binding of C2 intermediates as a function of cavity structure. We then developed a method of synthesizing open Cu nanocavity structures with a tunable geometry via the electroreduction of Cu2O cavities formed through acidic etching. The nanocavities showed a morphology-driven shift in selectivity from C2 to C3 products during the carbon monoxide electroreduction, to reach a propanol Faradaic efficiency of 21£¿¡À£¿1% at a conversion rate of 7.8£¿¡À£¿0.5£¿mA£¿cm£¿2 at £¿0.56£¿V versus a reversible hydrogen electrode
%U https://www.nature.com/articles/s41929-018-0168-4