Journal ArticleDOI
CO2 electroreduction to ethylene via hydroxide-mediated copper catalysis at an abrupt interface
Cao-Thang Dinh,Thomas Burdyny,Golam Kibria,Ali Seifitokaldani,Christine M. Gabardo,F. Pelayo García de Arquer,Amirreza Kiani,Jonathan P. Edwards,Phil De Luna,Oleksandr S. Bushuyev,Chengqin Zou,Chengqin Zou,Rafael Quintero-Bermudez,Yuanjie Pang,David Sinton,Edward H. Sargent +15 more
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TLDR
A copper electrocatalyst at an abrupt reaction interface in an alkaline electrolyte reduces CO2 to ethylene with 70% faradaic efficiency at a potential of −0.55 volts versus a reversible hydrogen electrode (RHE).Abstract:
Carbon dioxide (CO 2 ) electroreduction could provide a useful source of ethylene, but low conversion efficiency, low production rates, and low catalyst stability limit current systems. Here we report that a copper electrocatalyst at an abrupt reaction interface in an alkaline electrolyte reduces CO 2 to ethylene with 70% faradaic efficiency at a potential of −0.55 volts versus a reversible hydrogen electrode (RHE). Hydroxide ions on or near the copper surface lower the CO 2 reduction and carbon monoxide (CO)–CO coupling activation energy barriers; as a result, onset of ethylene evolution at −0.165 volts versus an RHE in 10 molar potassium hydroxide occurs almost simultaneously with CO production. Operational stability was enhanced via the introduction of a polymer-based gas diffusion layer that sandwiches the reaction interface between separate hydrophobic and conductive supports, providing constant ethylene selectivity for an initial 150 operating hours.read more
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Gas diffusion electrodes (GDEs) for electrochemical reduction of carbon dioxide, carbon monoxide, and dinitrogen to value-added products: a review
TL;DR: A comprehensive review of the challenges and advances in GDE development for various electrocatalytic reactions is presented in this paper, where the authors highlight key advantages of GDE over conventional electrodes.
Journal ArticleDOI
Constraining CO coverage on copper promotes high-efficiency ethylene electroproduction
Jun Li,Ziyun Wang,Christopher McCallum,Yi Xu,Fengwang Li,Yuhang Wang,Christine M. Gabardo,Cao-Thang Dinh,Tao-Tao Zhuang,Liang Wang,Jane Y. Howe,Yang Ren,Edward H. Sargent,David Sinton +13 more
TL;DR: In this article, the authors show that high selectivity can be achieved by constraining CO availability on copper, with an ethylene Faradaic efficiency of 72% and a partial current density of >800 µm−2.
Journal ArticleDOI
In Situ Infrared Spectroscopy Reveals Persistent Alkalinity near Electrode Surfaces during CO2 Electroreduction.
TL;DR: It is explicitly shown that commonly used strong phosphate buffers cannot sustain the interfacial pH during CO2 electroreduction on copper electrodes at relatively low current densities, <10 mA/cm2, by using in situ surface enhanced infrared absorption spectroscopy (SEIRAS) and computational modeling.
Journal ArticleDOI
Gas diffusion electrode design for electrochemical carbon dioxide reduction
Tu N. Nguyen,Cao-Thang Dinh +1 more
TL;DR: This tutorial review provides an insightful guide to developing GDEs with high activity, selectivity, and stability, the three important performance metrics in ECR.
Journal ArticleDOI
Comprehensive Understandings into Complete Reconstruction of Precatalysts: Synthesis, Applications, and Characterizations.
TL;DR: This review systematically summarizes several important advances in complete reconstruction for the first time, which includes fundamental understandings of complete reconstruction, the characteristics and advantages of completely reconstructed catalysts, and their design principles.
References
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