Amorphous Ni(OH)₂ Coated Cu Dendrites with Superaerophobic Interface for Bipolar Hydrogen Production Assisted with Formaldehyde Oxidation

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract Since formaldehyde oxidation reaction (FOR) can release H 2 , it is attractive to construct a bipolar hydrogen production system consisting of FOR and evolution (HER). Although copper‐based catalysts have attracted much attention due their low cost high activity, the performance enhancement mechanism lacks in‐depth investigation. Here, an amorphous‐crystalline catalyst amorphous nickel hydroxide‐coated copper dendrites on foam (Cu@Ni(OH) /CF) prepared. The modification Ni(OH) resulted in hydrophilic aerophobic states Cu@Ni(OH) /CF surface, facilitating transport liquid‐phase species electrode surface accelerating . Open circuit potential (OCP) density functional theory (DFT) calculations indicate that this core–shell structure facilitates adsorption HCHO OH − In addition, catalytic pathway are investigated through situ FTIR DFT calculations, results showed lowered energy barrier for C─H bond breaking H─H formation. HER//FOR system, Pt/C//Cu@Ni(OH) provide current 0.5 A cm −2 at 0.36 V achieve efficient stable production. This work offers new ideas designing electrocatalysts assisted with oxidation.

Language: Английский

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Regulating d-p band center with selenium vacancy in iron diselenide nanoarrays towards sulfion-assisted seawater electrolysis for chlorine-free hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 367 - 376

Published: Jan. 8, 2025

Language: Английский

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Research progress of Ce-based electrocatalysts in hydrogen evolution reaction

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Metal Doped Multicomponent Copper-Based Arrays for Formaldehyde Oxidation Assisted Dual Hydrogen Production System

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Green hydrogen production technology is an effective strategy for solving energy problems and environmental issues. In this paper, we report a bipolar system: Au–CuxO/CF∥Ru–CuxO/CF, in which the cathode produces through evolution reaction (HER) process anode formaldehyde oxidation (FOR). It found that when Au–CuxO/CF used FOR, C–H bond of will be broken at low potential to produce reactive H*. H* recombined Tafel step (H* + ⇌ H2) H2. At same time, oxidized high-value-added product HCOOH. We formation grain boundary-rich structures on Au–CuxO surface jointly promotes potentials. addition, introduced Ru elements into CuxO enhance cathodic HER. The FOR-HER system Au–CuxO/CF∥Ru–CuxO/CF was tested flow cell. produced current density 500 mA cm–2 only 0.38 V. This work provides construction catalyst design ideas voltages.

Language: Английский

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Impact of Aspect Ratio on Charge Carrier Dynamics and Efficiency Enhancement in CdSe/CdS Dot-in-Rod Nanostructures for Photocatalytic Hydrogen Evolution

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(50), P. 12425 - 12434

Published: Dec. 12, 2024

We demonstrated that the aspect ratio (AR)-tunable CdSe/CdS dot-in-rod (DiR) nanostructures with quasi-type-II band structure were successively synthesized using hot injection method. When AR of DiR was tuned from 10 to 37, exciton localization efficiency along longitudinal CdS rod shell decreased 57.9 15.1%, resulting in a 5-fold improvement photocatalytic hydrogen (H

Language: Английский

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