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
Membrane‐electrode assembly design parameters for optimal CO 2 reduction
TL;DR: In this paper , the ionomer-to-catalyst ratio (I:Cat), catalyst loading, and catalyst-layer thickness influence the performance of a cathode catalyst layer containing Ag nanoparticles supported on carbon.
Journal ArticleDOI
Stabilizing copper sites in coordination polymers toward efficient electrochemical C-C coupling
TL;DR: In this article , a stable single-site copper coordination polymer (Cu(OH)BTA) with periodic neighboring coppers was reported to catalyze carbon-carbon coupling and it exhibited 1.5 times increase of C 2 H 4 selectivity compared to its metallic counterpart at 500 mA cm − 2 .
Journal ArticleDOI
Probing Electrolyte Influence on CO<sub>2</sub> Reduction in Aprotic Solvents
TL;DR: In this article , the authors show that the bulk solvation behavior within the nonaqueous electrolyte can control the CO2 reduction reaction and product distribution occurring at the catalyst-electrolyte interface.
Journal ArticleDOI
Electrochemical Reduction of Carbon Dioxide at TiO2/Au Nanocomposites.
TL;DR: In this paper , a facile synthesis of nanocomposite consisting of TiO2 and Au nanoparticles via a tailored galvanic replacement reaction (GRR) was reported.
Journal ArticleDOI
Tandem Photocatalysis of CO2 to C2H4 via a Synergistic Rhenium-(I) Bipyridine/Copper-Porphyrinic Triazine Framework.
Rui-Ming Xu,Duanhui Si,Shao-Shuai Zhao,Qiu-Jin Wu,Xusheng Wang,Tian-Fu Liu,Hui Zhao,Rong Cao,Yuan-Biao Huang +8 more
TL;DR: In this article , an effective tandem photocatalysis strategy has been developed to support conversion of CO2 to ethylene by construction of the synergistic dual sites in rhenium-(I) bipyridine fac-[ReI(bpy)(CO)3Cl] (Re-bpy) and copper-porphyrinic triazine framework [PTF(Cu)].
References
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