Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy

Chen, Lulu; Li, Minhan; Zhang, Jia-Nan

doi:10.1007/s12274-024-6870-4

Nano Res.

2024

DOI: 10.1007/s12274-024-6870-4

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Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy

Lulu Chen,

Minhan Li,

Jia-Nan Zhang

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Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

Wang,

Cai

et al. 2024

Adv Funct Materials

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Ethylene (C2H4) electrosynthesis from the electrocatalytic CO2 reduction process holds enormous potential applications in industrial production. However, the sluggish kinetics of C─C coupling often result in low yield and poor selectivity for C2H4 production. Herein, the performance of Cu catalysts of varying sizes is investigated, prepared via a cryo‐mediated liquid phase exfoliation technique, for the electrochemical CO2 reduction to C2H4. The activity and selectivity of C2H4 gradually increase as the size of the Cu catalysts decreases from tens of nanometers to a few nanometers. Impressively, the 5 nm Cu quantum dots (Cu‐5) achieve a maximum C2H4 Faradaic efficiency (FE) of 81.5% and a half‐cell cathodic energy efficiency (CEE) of 42.2% with a large partial current density of 1.1 A cm−2 at −0.93 V versus the reversible hydrogen electrode. Structural characterization and in situ spectroscopic analysis reveal that the Cu‐5 quantum dots, dominated by the (100) facet, provide an abundance of active sites that enhance CO2 adsorption and activation, promoting the formation of *CO intermediates. The accumulation of *CO intermediates on the Cu active sites facilitates the CO‐CHO coupling reaction, thus enhancing the C2H4 production rate.

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Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

Wang,

Cai

et al. 2024

Adv Funct Materials

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Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy

Cited by 1 publication

References 124 publications

Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

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Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy

Cited by 1 publication

References 124 publications

Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO2 Reduction to Ethylene

Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO2 Reduction to Ethylene

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Product

Resources

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Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene

Enhanced Local CO Coverage on Cu Quantum Dots for Boosting Electrocatalytic CO₂ Reduction to Ethylene