A tin-modified copper foam for the efficient and selective reduction of CO2 to CO is reported. We employ a cost-efficient electrodeposition route to form a three-dimensional porous dendrite architecture, in which each dendrite possesses a copper core and a copper oxide/tin oxide shell. The sparse tin species on the electrode surface play a key role to achieve excellent faradaic efficiencies for CO formation with a maximum value of 94%. We demonstrate high CO partial current densities of 4.7 mA cm−2 and 7.9 mA cm−2 at applied potentials of -0.8 V and -1.1 V vs. the reversible hydrogen electrode, respectively. The high activity for electrochemical CO2 reduction is attributed to the unique hierarchical porous structure, which offers abundant electrochemically active sites and facilitates mass transport.
|Titolo:||Advanced Cu-Sn foam for selectively converting CO 2 to CO in aqueous solution|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||10.1016/j.apcatb.2018.05.056|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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