Rational Designing Microenvironment of Gas‐Diffusion Electrodes via Microgel‐Augmented CO2 Availability for High‐Rate and Selective CO2 Electroreduction to Ethylene DOI Creative Commons
Hesamoddin Rabiee, Mengran Li, Penghui Yan

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(40)

Published: Aug. 29, 2024

Abstract Efficient electrochemical CO 2 reduction reaction (CO RR) requires advanced gas‐diffusion electrodes (GDEs) with tunned microenvironment to overcome low availability in the vicinity of catalyst layer. Herein, for first time, pyridine‐containing microgels‐augmented is presented Cu O‐based GDE high‐rate ethylene, owing presence ‐phil microgels amine moieties. Microgels as three‐dimensional polymer networks act micro‐reservoirs engineer and boost local availability. The superior ethylene production performance modified by 4‐vinyl pyridine microgels, compared diethylaminoethyl methacrylate indicates bifunctional effect pyridine‐based enhance availability, electrocatalytic reduction. While Faradaic efficiency (FE) without was capped at 43% 300 mA cm −2 , showed 56% FE 700 . A similar trend observed zero‐gap design, GDEs 58% −4.0 cell voltage (>350 current density), resulting over 2‐fold improvement production. This study showcases use a higher rate RR‐to‐C 2+ opening an avenue several other more selective efficient electrolysis.

Language: Английский

Direct low concentration CO2 electroreduction to multicarbon products via rate-determining step tuning DOI Creative Commons

Liangyiqun Xie,

Yanming Cai, Yujing Jiang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 29, 2024

Direct converting low concentration CO2 in industrial exhaust gases to high-value multi-carbon products via renewable-energy-powered electrochemical catalysis provides a sustainable strategy for utilization with minimized separation and purification capital energy cost. Nonetheless, the electrocatalytic conversion of dilute into value-added chemicals (C2+ products, e.g., ethylene) is frequently impeded by rate weak carbon intermediates' surface adsorption strength. Here, we fabricate range Cu catalysts comprising fine-tuned Cu(111)/Cu2O(111) interface boundary density crystal structures aimed at optimizing rate-determining step decreasing thermodynamic barriers adsorption. Utilizing engineering, attain Faradaic efficiency (51.9 ± 2.8) % partial current (34.5 6.4) mA·cm−2 C2+ feed condition (5% v/v), comparing state-of-art electrolysis. In contrast prevailing belief that activation ( $${{CO}}_{2}+{e}^{-}+\, * \,\to {}^{ }{CO}_{2}^{-}$$ ) governs reaction rate, discover that, under conditions, shifts generation *COOH $${}^{ } {{CO}}_{2}^{-}+{H}_{2}O\to {COOH}+{{OH}}^{-}({aq})$$ Cu0/Cu1+ boundary, resulting better production performance. The development operate resembling waste holds promise reduction. authors report vacuum calcination approach regulating on Cu-based can electro-catalyze low-concentration CO2.

Language: Английский

Citations

6
Nanoconfinement Effects of Yolk–Shell Cu2O Catalyst for Improved C2+ Selectivity and Cu+ Stability in Electrocatalytic CO2 Reduction DOI
Jinghao Lu, Lili Yang, Yishuai Zhang

et al.

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(22), P. 20746 - 20756

Published: Nov. 2, 2023

Electrocatalytic conversion of carbon dioxide (CO2) to value-added hydrocarbon products provides an industrially viable approach utilizing resources and the storage renewable energy. Monovalent copper (Cu+) has been demonstrated be indispensable for formation C2+ via C–C coupling. However, selectivity stability Cu+ at cathodic potential remain a great challenge. In this work, we investigated electrochemical properties three Cu-based catalysts with different structures in electrocatalytic reduction CO2 reaction (eCO2RR). Results showed that Cu2O catalyst yolk–shell microstructure having distance between shell internal surface core external 25 nm displays best performance. It exhibits Faradaic efficiency 80.2% FEC2+ FEC1 ratio ∼8.9. Both situ ATR-SEIRAS ex XPS characterization results reveal is stable under experimental conditions, coverage adsorbed monoxide (*CO) on active site enhanced due nanoconfinement effects. The increased *CO significantly promotes coupling, leading selectivity.

Language: Английский

Citations

14
Photo-/electrocatalytic approaches to CO2 conversion on Cu2O-based catalysts DOI
Zixuan Zhao, Hongtao Wang, Qi Yu

et al.

Applied Catalysis A General, Journal Year: 2023, Volume and Issue: 667, P. 119445 - 119445

Published: Oct. 1, 2023

Language: Английский

Citations

13
Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy DOI
Lulu Chen, Minhan Li, Jianan Zhang

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(9), P. 7880 - 7899

Published: Aug. 7, 2024

Language: Английский

Citations

5
Rational Designing Microenvironment of Gas‐Diffusion Electrodes via Microgel‐Augmented CO2 Availability for High‐Rate and Selective CO2 Electroreduction to Ethylene DOI Creative Commons
Hesamoddin Rabiee, Mengran Li, Penghui Yan

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(40)

Published: Aug. 29, 2024

Abstract Efficient electrochemical CO 2 reduction reaction (CO RR) requires advanced gas‐diffusion electrodes (GDEs) with tunned microenvironment to overcome low availability in the vicinity of catalyst layer. Herein, for first time, pyridine‐containing microgels‐augmented is presented Cu O‐based GDE high‐rate ethylene, owing presence ‐phil microgels amine moieties. Microgels as three‐dimensional polymer networks act micro‐reservoirs engineer and boost local availability. The superior ethylene production performance modified by 4‐vinyl pyridine microgels, compared diethylaminoethyl methacrylate indicates bifunctional effect pyridine‐based enhance availability, electrocatalytic reduction. While Faradaic efficiency (FE) without was capped at 43% 300 mA cm −2 , showed 56% FE 700 . A similar trend observed zero‐gap design, GDEs 58% −4.0 cell voltage (>350 current density), resulting over 2‐fold improvement production. This study showcases use a higher rate RR‐to‐C 2+ opening an avenue several other more selective efficient electrolysis.

Language: Английский

Citations

5