Flexible tungsten disulfide superstructure engineering for efficient alkaline hydrogen evolution in anion exchange membrane water electrolysers

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

Published: July 8, 2024

Abstract Anion exchange membrane (AEM) water electrolysis employing non-precious metal electrocatalysts is a promising strategy for achieving sustainable hydrogen production. However, it still suffers from many challenges, including sluggish alkaline evolution reaction (HER) kinetics, insufficient activity and limited lifetime of ampere-level-current-density HER. Here, we report an efficient HER at industrial-level current density wherein flexible WS 2 superstructure designed to serve as the cathode catalyst AEM electrolysis. The features bond-free van der Waals interaction among low Young’s modulus nanosheets ensure excellent mechanical flexibility, well stepped edge defect structure realize high catalytic favorable interface micro-environment. unique can effectively withstand impact high-density gas-liquid exchanges facilitate mass transfer, endowing long-term durability under industrial-scale density. An electrolyser containing this exhibits cell voltage 1.70 V deliver constant 1 A cm −2 over 1000 h with negligible decay rate 9.67 μV −1 .

Language: Английский

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Amorphous Bismuth–Tin Oxide Nanosheets with Optimized C–N Coupling for Efficient Urea Synthesis

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(19), P. 13527 - 13535

Published: May 1, 2024

Closing the carbon and nitrogen cycles by electrochemical methods using renewable energy to convert abundant or harmful feedstocks into high-value C- N-containing chemicals has potential transform global landscape. However, efficient conversion avenues have date been mostly realized for independent reduction of CO2 NO3–. The synthesis more complex C–N compounds still suffers from low efficiency due inability find effective catalysts. To this end, here we present amorphous bismuth–tin oxide nanosheets, which effectively reduce barrier catalytic reaction, facilitating highly selective urea production. With enhanced adsorption activation on catalyst, a coupling pathway based *CO2 rather than traditional *CO is realized. optimized orbital symmetry (*CO2) (*NO2) intermediates promotes significant increase in Faraday production an outstanding value 78.36% at −0.4 V vs RHE. In parallel, selectivity formation also 90.41% 95.39%, respectively. results insights provide valuable reference further development new catalysts CO2.

Language: Английский

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Hydrothermal synthesis of NiS2@SnS2 nanohybrid for the water splitting application

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: 319, P. 129361 - 129361

Published: April 18, 2024

Language: Английский

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Nanoscale silicon porous materials for efficient hydrogen storage application

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 81, P. 110418 - 110418

Published: Jan. 13, 2024

Language: Английский

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Improvement of spinel OER electrochemical property by doping strategy for water splitting

Applied Physics A, Journal Year: 2024, Volume and Issue: 130(8)

Published: July 10, 2024

Language: Английский

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Advancing Catalysts by Stacking Fault Defects for Enhanced Hydrogen Production: A Review

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 10, 2024

Abstract Green hydrogen, derived from water splitting powered by renewable energy such as solar and wind energy, provides a zero‐emission solution crucial for revolutionizing hydrogen production decarbonizing industries. Catalysts, particularly those utilizing defect engineering involving the strategical introduction of atomic‐level imperfections, play vital role in reducing requirements enabling more sustainable transition toward hydrogen‐based economy. Stacking fault (SF) defects an important enhancing electrocatalytic processes reshaping surface reactivity, increasing active sites, improving reactants/product diffusion, regulating electronic structure due to their dense generation ability profound impact on catalyst properties. This review explores SF metal‐based materials, covering synthetic methods intentional applications production, including oxygen evolution reaction, photo‐ overall splitting, various other reduction nitrate carbon dioxide reaction. Finally, this addresses challenges associated with SF‐based catalysts, emphasizing importance detailed understanding properties catalysts optimize performance. It comprehensive overview processes, providing valuable insights advancing technologies.

Language: Английский

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Customizing oxygen electrocatalytic microenvironment with S, N codoped carbon nanofibers confining carbon nanocapsules and Co9S8 nanoparticles for rechargeable Zn-air batteries

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 352, P. 124060 - 124060

Published: April 21, 2024

Language: Английский

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Development of BaMnO3 nanoparticles embedded on rGO nanosheets via facile hydrothermal route to improve water oxidation

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 68, P. 970 - 978

Published: May 1, 2024

Language: Английский

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Chemical dealloying derived nanoporous FeCoNiCuTi high-entropy bifunctional electrocatalysts for highly efficient overall water splitting under alkaline conditions

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152145 - 152145

Published: May 11, 2024

Language: Английский

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Rational design of local microenvironment for electrocatalytic water splitting

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(14), P. 4080 - 4106

Published: Jan. 1, 2024

This summary describes the effects of wettability, local pH, interfacial water structure, and electrolyte composition on interface reactant compositions, key intermediate adsorption, reaction kinetics.

Language: Английский

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