Selective CO<sub>2</sub> electroreduction to formate over a Cu-based catalyst in S<sup>2−</sup>-containing electrolyte

Liang, Shuyu; Fang, Ziyi; Yang, Chaoran; Wang, Qiang

doi:10.1039/d4cc02047b

Chem. Commun.

2024

DOI: 10.1039/d4cc02047b

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Selective CO₂ electroreduction to formate over a Cu-based catalyst in S²⁻-containing electrolyte

Shuyu Liang,

Ziyi Fang,

Chaoran Yang

et al.

Abstract: A Cu-based electrocatalyst selectively and durably electroreduces CO2 to formate with a maximum faradaic efficiency of up to 74% in a S2−-containing electrolyte.

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Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Stojkovikj,

El‐Nagar,

Gupta

et al. 2024

Adv Funct Materials

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The conversion of CO2 into formate (HCOO−), a techno‐economically feasible product, can be achieved using earth‐abundant CuxS electrocatalysts, but questions remain regarding how catalyst structure, composition, and reaction environment influence product selectivity. A novel synthesis method based on electrodeposition of Cu foam and its subsequent sulfidation via immersion in sulfur saturated toluene solution resulted in CuxS foams. Catalytic activity studies found that HCOO− selectivity is dependent on electrochemical activation at higher overpotentials. To understand the effects of activation, determine the active forms of the catalysts, and identify the role of sulfur, the electrodes are carefully characterized as well as gaseous and sulfur dissolved in electrolyte. This included study of the effects of intentional addition of solution sulfur species, identification of the sulfur loss, determination of the electrode composition and relating sulfur speciation to observed product selectivity. It is found that residual sulfur stabilizes Cu+ during electrolysis at potentials favoring HCOO− production, in contrast to pristine Cu that undergoes complete reduction and shows poor HCOO− selectivity. Sulfur in both the catalyst and dissolved in electrolyte are of dynamic nature, and surface residues of SO42− species are identified in all activated catalysts which correspond with enhanced HCOO− production.

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Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Stojkovikj,

El‐Nagar,

Gupta

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

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Selective CO₂ electroreduction to formate over a Cu-based catalyst in S²⁻-containing electrolyte

Abstract: A Cu-based electrocatalyst selectively and durably electroreduces CO2 to formate with a maximum faradaic efficiency of up to 74% in a S2−-containing electrolyte.

Cited by 1 publication

References 34 publications

Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

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Selective CO2 electroreduction to formate over a Cu-based catalyst in S2−-containing electrolyte

Abstract: A Cu-based electrocatalyst selectively and durably electroreduces CO2 to formate with a maximum faradaic efficiency of up to 74% in a S2−-containing electrolyte.

Cited by 1 publication

References 34 publications

Facile Synthesis of CuxS Electrocatalysts for CO2 Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Facile Synthesis of CuxS Electrocatalysts for CO2 Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Contact Info

Product

Resources

About

Selective CO₂ electroreduction to formate over a Cu-based catalyst in S²⁻-containing electrolyte

Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Facile Synthesis of Cu_xS Electrocatalysts for CO₂ Conversion into Formate and Study of Relations Between Cu and S with the Selectivity