Recent Advances and Perspectives on Coupled Water Electrolysis for Energy‐Saving Hydrogen Production

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Abstract Overall water splitting (OWS) to produce hydrogen has attracted large attention in recent years due its ecological‐friendliness and sustainability. However, the efficiency of OWS been forced by sluggish kinetics four‐electron oxygen evolution reaction (OER). The replacement OER alternative electrooxidation small molecules with more thermodynamically favorable potentials may fundamentally break limitation achieve production low energy consumption, which also be accompanied value‐added chemicals than or electrochemical degradation pollutants. This review critically assesses latest discoveries coupled various OWS, including alcohols, aldehydes, amides, urea, hydrazine, etc. Emphasis is placed on corresponding electrocatalyst design related mechanisms (e.g., dual hydrogenation N–N bond breaking hydrazine C═N regulation urea inhibit hazardous NCO − NO productions, etc.), along emerging reactions (electrooxidation tetrazoles, furazans, iodide, quinolines, ascorbic acid, sterol, trimethylamine, etc.). Some new decoupled electrolysis self‐powered systems are discussed detail. Finally, potential challenges prospects highlighted aid future research directions.

Язык: Английский

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Decorating Cu Nanoparticles with Pd Clusters for Enhanced Nitrile Electro-Hydrogenation to Primary Amines by Effective Hydrogen Spillover

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 1341 - 1351

Опубликована: Янв. 7, 2025

The H2O-participating electrochemical hydrogenation (ECH) of benzonitrile represents a mild and efficient method for benzylamine synthesis, but the kinetics Faraday efficiency are still limited. Herein, developed Pd clusters dispersed Cu nanoparticles encapsulated in porous carbon (Pdn-Cu@C) achieves ECH (C6H5CN) to benzylamines (C6H5CH2NH2). In situ infrared spectroscopy theoretical studies reveal that Pd/Cu interface functions as active site hydrogen (*H) generated by H2O dissociation, enhances adsorption C6H5CN, weakens C6H5CH2NH2. Moreover, Gibbs free energy barriers *H spillover much lower than self-coupling. As expected, Pdn-Cu@C exhibits electro-hydrogenation C6H5CN with conversion 97.42%, high C6H5CH2NH2 selectivity 97.21%, Faradaic 92.10% under specific voltage. This finding blazes feasible trail suppress competitive self-coupling offers insights multistep protonation reactions.

Язык: Английский

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Single-atom catalysts for electrocatalytic conversion of biomass-derived small molecules

Coordination Chemistry Reviews, Год журнала: 2025, Номер 534, С. 216576 - 216576

Опубликована: Март 6, 2025

Язык: Английский

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Electrochemical N–N Oxidatively Coupled Dehydrogenation of 3,5-Diamino-1H-1,2,4-triazole for Value-Added Chemicals and Bipolar Hydrogen Production

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 8, 2025

Electrochemical H2 production from water favors low-voltage molecular oxidation to replace the oxygen evolution reaction as an energy-saving and value-added approach. However, there exists a mismatch between high demand for slow anodic reactions, restricting practical applications of such hybrid systems. Here, we propose bipolar approach, with generation N–N oxidatively coupled dehydrogenation (OCD) 3,5-diamino-1H-1,2,4-triazole (DAT), in addition cathodic generation. The system requires relatively low potentials 0.872 1.108 V vs RHE reach 10 500 mA cm–2, respectively. H-type electrolyzer only 0.946 1.129 deliver 100 respectively, electricity consumption (1.3 kWh per m3 H2) reduced by 68%, compared conventional splitting. Moreover, process is highly appealing due absence traditional hazardous synthetic conditions azo compounds at anode crossover/mixing H2/O2 electrolyzer. A flow-type operates stably cm–2 300 h. Mechanistic studies reveal that Pt single atom nanoparticle (Pt1,n) optimize adsorption S active sites over Pt1,n@VS2 catalysts. At anode, stepwise −NH2 DAT then oxidative coupling −N–N– predominantly form while generating H2. present report paves new way atom-economical aminotriazole green electrosynthesis chemicals.

Язык: Английский

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Coupling furfural oxidation for bias-free hydrogen production using crystalline silicon photoelectrodes

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 19, 2025

To commercialize the technology of photoelectrochemical hydrogen production, it is essential to surpass US. Department Energy target 0.36 mmol h−1 cm−2 for 1-sun production rate. In this study, we utilize crystalline silicon, which can exhibit highest photocurrent density (43.37 mA cm−2), as photoelectrode material. However, achieving bias-free water splitting (>1.6 V) remains challenging due intrinsic low photovoltage silicon (0.6 V). address limitation, replace oxidation with low-potential furfural oxidation, enabling not only but also dual at both cathodic and anodic sides. This approach results in a record rate 1.40 cm−2, exceeding by more than fourfold. The authors demonstrate solar system pairing Si photocathode, that surpasses over four-fold.

Язык: Английский

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Unveiling the role of bismuth doping in NiFe layered double hydroxide catalysts: Synergistic electronic modulation for superior oxygen evolution activity

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 123, С. 23 - 31

Опубликована: Апрель 1, 2025

Язык: Английский

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Formaldehyde oxidation reaction enhanced by interface engineering of Cu/Cu2O/Co(OH)2 composite electrocatalyst for bipolar hydrogen production

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162568 - 162568

Опубликована: Апрель 1, 2025

Язык: Английский

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