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| Naji, M. |
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| Azevedo, Nuno Monteiro |
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Bond, Alan
in Cooperation with on an Cooperation-Score of 37%
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Publications (6/6 displayed)
- 2021CdS-Enhanced Ethanol Selectivity in Electrocatalytic CO2 Reduction at Sulfide-Derived Cu-Cdcitations
- 2019Electrocatalytic CO2 reduction to formate on Cu based surface alloys with enhanced selectivitycitations
- 2016Efficient enzymatic oxidation of glucose mediated by ferrocene covalently attached to polyethylenimine stabilized gold nanoparticlescitations
- 2016EPR spectroscopic characterization of a monomeric PtIII species produced via electrochemical oxidation of the anticancer compound trans-[PtII{(p-HC6F4)NCH2CH2NEt2}Cl(py)]citations
- 2011Anion dependent redox changes in iron bis-terdentate nitroxide {NNO} chelatescitations
- 2011Aluminium coordination chemistry in ionic liquid/AlCl3 mixtures
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article
CdS-Enhanced Ethanol Selectivity in Electrocatalytic CO2 Reduction at Sulfide-Derived Cu-Cd
Abstract
The development of Cu-based catalysts for the electrochemical CO2 reduction reaction (eCO2RR) is of major interest for generating commercially important C2 liquid products such as ethanol. Cu is exclusive among the eCO2RR metallic catalysts in that it facilitates the formation of a range of highly reduced C2 products, with a reasonable total faradaic efficiency but poor product selectivity. Here, a series of new sulfide-derived copper-cadmium catalysts (SD-CuxCdy) was developed. An excellent faradaic efficiency of around 32 % but with a relatively low current density of 0.6 mA cm−2 for ethanol was obtained using the SD-CuCd2 catalyst at the relatively low overpotential of 0.89 V in a CO2-saturated aqueous 0.10 m KHCO3 solution with an H-cell. The current density increased by an order of magnitude under similar conditions using a flow cell where the mass transport rate for CO2 was greatly enhanced. Ex situ spectroscopic and microscopic, and voltammetric investigations pointed to the role of abundant phase boundaries between CdS and Cu+/Cu sites in the SD-CuCd2 catalyst in enhancing the selectivity and efficiency of ethanol formation at low potentials.