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.

Advanced Cu-Sn foam for selectively converting CO 2 to CO in aqueous solution / Zeng, Juqin; Bejtka, Katarzyna; Ju, Wenbo; Castellino, Micaela; Chiodoni, Angelica; Sacco, Adriano; Farkhondehfal, M. Amin; Hernández, Simelys; Rentsch, Daniel; Battaglia, Corsin; Pirri, Candido F.. - In: APPLIED CATALYSIS. B, ENVIRONMENTAL. - ISSN 0926-3373. - ELETTRONICO. - 236:(2018), pp. 475-482. [10.1016/j.apcatb.2018.05.056]

Advanced Cu-Sn foam for selectively converting CO 2 to CO in aqueous solution

Zeng, Juqin;Bejtka, Katarzyna;Castellino, Micaela;Chiodoni, Angelica;Sacco, Adriano;Farkhondehfal, M. Amin;Hernández, Simelys;Pirri, Candido F.
2018

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2731032
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