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

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

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Oxygen Defect Site Filling Strategy Induced Moderate Enrichment of Reactants for Efficient Electrocatalytic Biomass Upgrading

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

Published: Nov. 4, 2024

Abstract The electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMF) provides a feasible approach for the efficient utilization biomass. Defect regulation is an effective strategy in field biomass upgrading to enhance adsorption capacity reactants and thus increase activity. However, how select appropriate strategies regulate over‐enrichment induced by excessive oxygen vacancy still huge challenge. In this work, defect‐filling design construct element‐filled site layered double hydroxide (S─Ov─LDH) adopted, which achieves significant reduction electrolysis potential platform molecule HMF reaction current density. Physical characterizations, electrochemical measurements, theoretical calculations prove that formation metal─S bond second shell effectively regulates electronic structure material, weakening over‐strong OH − vacancy, promoting high‐valence Co 3+ during reaction, forming new sites. This work discusses catalytic enhancement mechanism defect filling detail, fills gap upgrading, favorable guidance further development strategies.

Language: Английский

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Electrochemical Conversion of 5-Hydroxymethylfurfural to 2,5-Furandicarboxaldehyde Using Mn(III)–Schiff Base Catalysts

Inorganics, Journal Year: 2025, Volume and Issue: 13(2), P. 30 - 30

Published: Jan. 22, 2025

2,5-furandicarboxaldehyde (DFF) is one of the most promising biomass-based building blocks for synthesis biobased polymers. DFF can be obtained from 5-hydroxymethylfurfural (HMF), a fructose derivate, and it key molecule in sequence reactions furan chemistry to develop plastics. In this frame, four manganese(III)–Schiff base complexes 1–4 have been obtained. The general formula complexes, MnLn(OCN)(H2O/CH3OH)m (Ln being Schiff ligands L1–L4, formed as result condensation different substituted hydroxybenzaldehydes with diverse diamines, m = 1–3), has confirmed by characterization through analytical spectroscopic techniques. X-ray crystallographic studies 1 2 showed tetragonally distorted octahedral structures, where was placed equatorial coordination positions Mn(III) ion. Complexes behaved efficient catalysts oxidation HMF an electrolytic reaction at pH 8.5, phosphate buffer room temperature, conversion rates 70–80%. On other hand, 3 4, axial position sterically less accessible, yielded only 11% DFF. results indicate that correct selection metal allows development new way obtain

Language: Английский

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A Transition‐Metal‐Based Bifunctional Electrocatalyst for Coupling Glucose Upgrade with Nitrate Reduction

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract The integration of glucose oxidation reaction (GOR) and nitrate reduction (NO 3 − RR) in an electrolyzer affords a sustainable approach to produce high value‐added products remove pollutants. Herein, 3D hierarchical architecture consisting defect‐rich copper–cobalt nanosheets immobilized by cobalt phosphide‐modified nickel foam (D‐CuCo/CoP/NF) is rationally designed as bifunctional electrocatalyst for GOR NO RR. resulting self‐standing electrode displayed remarkable activity. Only 1.29 V vs. RHE required yield current density 100 mA cm −2 . Glucose efficiently converted into formate with selectivity value 93.4% Faraday efficiency (FE) 90.3%. as‐prepared D‐CuCo/CoP/NF also capable transforming nitrates valuable ammonia, leading FE 96.9% rate 802.9 µmol h −1 Such performance renders it the best electrocatalysts Mechanistic studies revealed that defects catalyst greatly facilitated adsorption both Cu(OH) 2 Co 3+ ‐O/Co 4+ ‐O species served active sites reaction. A GOR||NO RR hybrid flow cell constructed using electrode, at voltage 1.35 V.

Language: Английский

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Reaction-induced reconstruction and redispersion of Ni@C catalyst for enhancing HMF electrooxidation

Molecular Catalysis, Journal Year: 2025, Volume and Issue: 580, P. 115131 - 115131

Published: April 14, 2025

Language: Английский

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Amorphous/Crystalline Heterostructure Nickel–Cobalt Oxides with Rich Oxygen Vacancies for Electrocatalytic Production of Benzoic Acid Coupled with Nitrate Reduction

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Selective four-electron mild electrochemical oxidation of benzyl alcohol to high-value-added benzoic acid is regarded as a green alternative conventional synthesis methods under moderate conditions. Herein, we synthesize oxygen vacancy-rich amorphous/crystalline heterostructure spinel-type oxides NiCo2O4 bifunctional electrocatalyst by pulse voltammetry treatment process, which can be utilized for the anode (AOR) and cathode nitrate reduction reaction (NO3RR), respectively. The designed NiCo2O4-x-25/NF delivers only 1.18 V vs RHE at 10 mA cm-2, Faraday efficiency ∼100%. systematic studies reveal that amorphous structure generates abundant vacancies, promoting rapid generation active sites intermediate species adsorption. Meanwhile, presence crystalline accelerates electron transfer maintains structural stability, thereby improving overall performance. Impressively, it exhibits excellent electrocatalytic performance AOR coupled with NO3RR in an integrated electrolyzer, achieving current density 100 cm-2 applied low cell voltage 1.38 maintaining superior catalytic withstanding continuous electrolysis 144 h. This work provides facile approach high performance, holding great potential paired electrosynthesis value-added chemicals.

Language: Английский

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Self-Powered Electrocatalytic Integrated System based on TENG for High-Yield Bipolar Hydrogen Production

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110707 - 110707

Published: Jan. 1, 2025

Language: Английский

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Unlocking the potential of chemical-assisted water electrolysis for green hydrogen production

Industrial Chemistry and Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Chemical-assisted water electrolysis is gaining attraction as an alternative to conventional produce hydrogen, but high overpotential a major challenge. This review covers advanced strategies reduce the operation voltage.

Language: Английский

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Advances and Prospects of Selective Electrocatalytic Upgrading of 5‐Hydroxymethylfurfural to Furan‐2,5‐Dicarboxylic Acid

The Chemical Record, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract The electrocatalytic upgrading of 5‐hydroxymethylfurfural (HMF, 5‐(Hydroxymethyl) furan‐2‐carbaldehyde) has emerged as a renewable and environmentally friendly means for the production high‐value chemicals, with oxidation product furan‐2,5‐dicarboxylic acid (FDCA, 2,5‐furandicarboxylic acid) possessing economic viability in substituting terephthalic polymer synthesis. This article reviews recent advancements selective HMF to FDCA, including reaction pathways, mechanisms, well activity descriptors (HMFOR), alongside advanced operando characterization techniques. Subsequently, representative HMFOR catalysts, encompassing noble metal, non‐noble transition metal‐based catalysts metal free‐based are presented. Then strategies regulating longevity were introduced, followed by an exploration future prospects development catalysts.

Language: Английский

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Reaction-Induced Reconstruction and Redispersion of Ni@C Catalyst for Enhancing Hmf Electrooxidation

Published: Jan. 1, 2025

Language: Английский

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