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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Beyond electrolysis: old challenges and new concepts of electricity-driven chemical reactors
TL;DR: In this paper, the authors provide a critical perspective on the entire spectrum of chemical and catalytic reactors, in which electricity plays different roles targeting either the reaction mechanism or the thermal energy supply.
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Chemical Diversity of Metal Sulfide Minerals and Its Implications for the Origin of Life
TL;DR: Combining the data-mining of mineral databases with experimental methods, theories, and machine-learning approaches developed in the field of electrocatalysis will facilitate the prediction and verification of catalytic performance under a wide range of pH and Eh conditions, and will aid in the rational screening of mineral catalysts involved in the origin of life.
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Editors' Choice—Flooded by Success: On the Role of Electrode Wettability in CO2 Electrolyzers that Generate Liquid Products
McLain E. Leonard,Michael J. Orella,Nicholas Aiello,Yuriy Román-Leshkov,Antoni Forner Cuenca,Fikile R. Brushett +5 more
TL;DR: In this paper, the authors measured contact angles of water-organic product dilutions on polytetrafluoroethylene (PTFE) and graphite surfaces as planar analogues for gas diffusion electrodes (GDEs).
Journal ArticleDOI
Electrolyte Driven Highly Selective CO2 Electroreduction at Low Overpotentials
TL;DR: In this article, the concentration effect of KCO3 in CO2 reduction reaction (CO2RR) was systematically investigated on the low-cost core-shell structured Cu2O@SnOx nanoparticle-derived hybrid catalyst.
Journal ArticleDOI
Covalently anchoring covalent organic framework on carbon nanotubes for highly efficient electrocatalytic CO2 reduction
TL;DR: In this article , por-based covalent organic frameworks (Por-COF) were vertically anchored on carbon nanotubes (CNT) for efficient electrocatalytic CO 2 reduction reaction (CO 2 RR) and showed superior activity (FE CO : 99.3%), higher partial current density and good durability in 0.5 M KHCO 3 by H-type cell.
References
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