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
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
Citations
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Journal ArticleDOI
Transient Effects Caused by Gas Depletion during Carbon Dioxide Electroreduction.
TL;DR: It is concluded that CO2 depletion causes a strong decay in the electrochemical reaction efficiency, and pH is suggested as an accurate and indirect means to measure CO2 concentration in a liquid electrolyte.
Journal ArticleDOI
CO2-free high-purity ethylene from electroreduction of CO2 with 4% solar-to-ethylene and 10% solar-to-carbon efficiencies
Aditya Prajapati,Nishithan C. Kani,Joseph A. Gauthier,Rohan Sartape,Jiahan Xie,Ivan Bessa,Miguel T. Galante,Samuel L. Leung,Marcio H. S. Andrade,Robert T. Somich,Márcio das Virgens Rebouças,Gus T. Hutras,Nathália Diniz,Meenesh R. Singh +13 more
TL;DR: In this article , an aqueous flow-through electrochemical cell was developed to enhance the activity and selectivity of C2H4 on a three-dimensional (3D) Cu mesh electrode by applying square wave oscillating potentials.
Journal ArticleDOI
First-principles study of N2O decomposition on (001) facet of perovskite LaBO3 (B = Mn, Co, Ni)
TL;DR: In this article, density functional theory was used to investigate the N2O molecule decomposition mechanism on LaBO3 perovskites in terms of thermodynamics and kinetics.
Journal ArticleDOI
Bicarbonate Electroreduction to Multicarbon Products Enabled by Cu/Ag Bilayer Electrodes and Tailored Microenviroments
TL;DR: In this paper , a bicarbonate electrolyzer can achieve the direct conversion of CO2 capture solutions to multicarbon (C2+) products (i.e., acetate, ethylene, ethanol, propanol) on rationally designed Cu/Ag bilayer electrodes with bilayer cation-and anion conducting ionomers.
Journal ArticleDOI
Hydrophobic Electrode Design for CO2 Electroreduction in a Microchannel Reactor.
TL;DR: In this article , a hydrophobic polytetrafluoroethylene (PTFE)-doped Ag nanocatalyst on a Zn rod was synthesized through a facile galvanic replacement of 2Ag++Zn → 2Ag + Zn2+.
References
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