CO2 fixation into carbon nanofibres using electrochemical–thermochemical tandem catalysis

Nature Catalysis, Journal Year: 2024, Volume and Issue: 7(1), P. 98 - 109

Published: Jan. 11, 2024

Language: Английский

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In situ copper faceting enables efficient CO2/CO electrolysis

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 26, 2024

Abstract The copper (Cu)-catalyzed electrochemical CO 2 reduction provides a route for the synthesis of multicarbon (C 2+ ) products. However, thermodynamically favorable Cu surface (i.e. Cu(111)) energetically favors single-carbon production, leading to low energy efficiency and production rates C Here we introduce in situ faceting from enable preferential exposure Cu(100) facets. During precatalyst evolution, phosphate ligand slows assists generation co-adsorption hydroxide ions, steering reconstruction (100). resulting catalyst enables current densities > 500 mA cm −2 Faradaic efficiencies >83% towards products both reduction. When run at 150 hours, maintains 37% full-cell 95% single-pass carbon throughout.

Language: Английский

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Challenges and Opportunities for Single‐Atom Electrocatalysts: From Lab‐Scale Research to Potential Industry‐Level Applications

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 13, 2024

Single-atom electrocatalysts (SACs) are a class of promising materials for driving electrochemical energy conversion reactions due to their intrinsic advantages, including maximum metal utilization, well-defined active structures, and strong interface effects. However, SACs have not reached full commercialization broad industrial applications. This review summarizes recent research achievements in the design crucial electrocatalytic on sites, coordination, substrates, as well synthesis methods. The key challenges facing activity, selectivity, stability, scalability, highlighted. Furthermore, it is pointed out new strategies address these increasing activity enhancing utilization improving optimizing local environment, developing fabrication techniques, leveraging insights from theoretical studies, expanding potential Finally, views offered future direction single-atom electrocatalysis toward commercialization.

Language: Английский

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Immobilized Tetraalkylammonium Cations Enable Metal‐free CO₂ Electroreduction in Acid and Pure Water

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 2, 2024

Abstract Carbon dioxide reduction reaction (CO 2 RR) provides an efficient pathway to convert CO into desirable products, yet its commercialization is greatly hindered by the huge energy cost due loss and regeneration. Performing RR under acidic conditions containing alkali cations can potentially address issue, but still causes (bi)carbonate deposition at high current densities, compromising product Faradaic efficiencies (FEs) in present‐day acid‐fed membrane electrode assemblies. Herein, we present a strategy using positively charged polyelectrolyte—poly(diallyldimethylammonium) immobilized on graphene oxide via electrostatic interactions displace cations. This enables FE of 85 %, carbon efficiency 93 (EE) 35 % for 100 mA cm −2 modified Ag catalysts acid. In pure‐water‐fed reactor, obtained 78 with 30 EE 40 °C. All performance metrics are comparable or even exceed those attained presence metal

Language: Английский

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Materials challenges on the path to gigatonne CO2 electrolysis

Nature Reviews Materials, Journal Year: 2024, Volume and Issue: 9(8), P. 535 - 549

Published: June 24, 2024

Language: Английский

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