Enhanced Electrochemical Reduction of CO₂ to Ethylene on Electrodeposited Copper in 0.1 M KHCO₃

摘要

Copper dendritic structures with low porosity were prepared via electrodeposition under acid-freeconditions. The microstructure (morphology and facet selectivity) could be tuned by altering theelectrodeposition potential and time length. In contrast to previous electrodeposited copper underacidic conditions, the present copper electrodes led to enhanced formation of ethylene relative topolycrystalline copper for electrochemical reduction of carbon dioxide. The synergy of the non-porousdendritic structures and the increased content of exposed high-index crystal facet (311) may accountfor this improvement.