CO ₂ electrolysis to multicarbon products at activities greater than 1 A cm ⁻²

Science, Год журнала: 2020, Номер 367(6478), С. 661 - 666

Опубликована: Фев. 6, 2020

Electrolysis offers an attractive route to upgrade greenhouse gases such as carbon dioxide (CO2) valuable fuels and feedstocks; however, productivity is often limited by gas diffusion through a liquid electrolyte the surface of catalyst. Here, we present catalyst:ionomer bulk heterojunction (CIBH) architecture that decouples gas, ion, electron transport. The CIBH comprises metal superfine ionomer layer with hydrophobic hydrophilic functionalities extend ion transport from tens nanometers micrometer scale. By applying this design strategy, achieved CO2 electroreduction on copper in 7 M potassium hydroxide (pH ≈ 15) ethylene partial current density 1.3 amperes per square centimeter at 45% cathodic energy efficiency.

Язык: Английский

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Designing materials for electrochemical carbon dioxide recycling

Nature Catalysis, Год журнала: 2019, Номер 2(8), С. 648 - 658

Опубликована: Июль 1, 2019

Язык: Английский

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Electrocatalysis for CO₂conversion: from fundamentals to value-added products

Chemical Society Reviews, Год журнала: 2021, Номер 50(8), С. 4993 - 5061

Опубликована: Янв. 1, 2021

This timely and comprehensive review mainly summarizes advances in heterogeneous electroreduction of CO₂: from fundamentals to value-added products.

Язык: Английский

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CO ₂ electrolysis to multicarbon products in strong acid

Science, Год журнала: 2021, Номер 372(6546), С. 1074 - 1078

Опубликована: Июнь 3, 2021

Carbon dioxide electroreduction (CO2R) is being actively studied as a promising route to convert carbon emissions valuable chemicals and fuels. However, the fraction of input CO2 that productively reduced has typically been very low, <2% for multicarbon products; balance reacts with hydroxide form carbonate in both alkaline neutral reactors. Acidic electrolytes would overcome this limitation, but hydrogen evolution hitherto dominated under those conditions. We report concentrating potassium cations vicinity electrochemically active sites accelerates activation enable efficient CO2R acid. achieve on copper at pH <1 single-pass utilization 77%, including conversion efficiency 50% toward products (ethylene, ethanol, 1-propanol) current density 1.2 amperes per square centimeter full-cell voltage 4.2 volts.

Язык: Английский

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Advanced Electrocatalysts with Single-Metal-Atom Active Sites

Chemical Reviews, Год журнала: 2020, Номер 120(21), С. 12217 - 12314

Опубликована: Ноя. 2, 2020

Electrocatalysts with single metal atoms as active sites have received increasing attention owing to their high atomic utilization efficiency and exotic catalytic activity selectivity. This review aims provide a comprehensive summary on the recent development of such single-atom electrocatalysts (SAECs) for various energy-conversion reactions. The discussion starts an introduction different types SAECs, followed by overview synthetic methodologies control dispersion atomically resolved characterization using state-of-the-art microscopic spectroscopic techniques. In recognition extensive applications electrocatalytic studies are dissected in terms important electrochemical reactions, including hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR), nitrogen (NRR). Examples SAECs deliberated each case performance, structure-property relationships, enhancement mechanisms. A perspective is provided at end section about remaining challenges opportunities targeted reaction.

Язык: Английский

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Molecular electrocatalysts can mediate fast, selective CO ₂ reduction in a flow cell

Science, Год журнала: 2019, Номер 365(6451), С. 367 - 369

Опубликована: Июль 25, 2019

Practical electrochemical carbon dioxide (CO2) conversion requires a catalyst capable of mediating the efficient formation single product with high selectivity at current densities. Solid-state electrocatalysts achieve CO2 reduction reaction (CO2RR) densities ≥ 150 milliamperes per square centimeter (mA/cm2), but maintaining selectivities and efficiencies remains challenge. Molecular CO2RR catalysts can be designed to low overpotentials only irrelevant commercial operation. We show here that cobalt phthalocyanine, widely available molecular catalyst, mediate CO in zero-gap membrane flow reactor > 95% mA/cm2 The revelation work efficiently under these operating conditions illuminates distinct approach for optimizing electrolyzers.

Язык: Английский

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Advances and Challenges for the Electrochemical Reduction of CO₂ to CO: From Fundamentals to Industrialization

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(38), С. 20627 - 20648

Опубликована: Апрель 17, 2021

Abstract The electrochemical carbon dioxide reduction reaction (CO 2 RR) provides an attractive approach to convert renewable electricity into fuels and feedstocks in the form of chemical bonds. Among different CO RR pathways, conversion is considered one most promising candidate reactions because its high technological economic feasibility. Integrating catalyst electrolyte design with understanding catalytic mechanism will yield scientific insights promote this technology towards industrial implementation. Herein, we give overview recent advances challenges for selective CO. Multidimensional engineering are also summarized. Furthermore, studies on large‐scale production highlighted facilitate industrialization . To conclude, remaining future directions application generate highlighted.

Язык: Английский

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Understanding cation effects in electrochemical CO₂ reduction

Energy & Environmental Science, Год журнала: 2019, Номер 12(10), С. 3001 - 3014

Опубликована: Янв. 1, 2019

Field-sensitive electrochemical reactions are controlled by electrode charging which is sensitive to the size of electrolyte containing cations.

Язык: Английский

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Strategies in catalysts and electrolyzer design for electrochemical CO₂reduction toward C₂₊products

Science Advances, Год журнала: 2020, Номер 6(8)

Опубликована: Фев. 21, 2020

Recent progress about electrochemical CO 2 reduction toward C 2+ products is reviewed.

Язык: Английский

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Towards molecular understanding of local chemical environment effects in electro- and photocatalytic CO2 reduction

Nature Catalysis, Год журнала: 2020, Номер 3(10), С. 775 - 786

Опубликована: Сен. 28, 2020

Язык: Английский

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