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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Advancing Green Hydrogen: Innovations and Challenges in Seawater Electrolysis for Sustainable Energy Production

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115644 - 115644

Published: Jan. 1, 2025

Language: Английский

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MoC_x/CoP Janus Structure Embedded Carbon Frame for Boosting Hydrazine Oxidation and Hydrogen Evolution Reactions

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

Published: Feb. 3, 2025

Abstract The integration of hydrazine electrooxidation (HzOR) and hydrogen evolution reaction (HER) presents an efficient pathway for high‐purity production. However, developing bifunctional catalysts remains challenging the demands multiple active‐centers tailored electronic properties. Here, a unique Janus nano‐catalysts MoC x /CoP embedded on carbon frameworks (MoC /CoP@C) is introduced, featuring dual states (depletion accumulation)driven by charge redistribution within /CoP, acting as active‐sites (DAS) both HER HzOR. Theoretical analysis reveals these independent DAS in significantly enhance catalytic activity Specifically, accumulated electrons at interfaces weaken bonding strength N‐H N 2 H 4 , thereby decreasing dehydrogenation energy barrier while electronic‐deficient Mo sites accelerate * desorption, thus promoting kinetics. This catalyst exhibits ultra‐low potential −73 mV 10 mA cm −2 anodic HzOR, comparable to noble low overpotential 95 cathodic HER. When employed overall splitting (OHzS) system, /CoP@C shows promising commercial potential, with consumption (0.16 V), high Faradaic efficiency (95.4%) long‐term stability. study underscores feasibility designing elucidates mechanistic origins activities.

Language: Английский

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Unveiling Oxygen Vacancy Engineering in CoMo‐Based Catalysts for Enhanced Oxygen Evolution Reaction Activity

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

Published: Jan. 8, 2025

Abstract Oxygen vacancy (V O ) engineering is widely regarded as a key strategy for enhancing CoMo‐based catalysts oxygen evolution reaction (OER) while understanding their formation mechanisms and role in boosting OER activity remains significant challenge. Herein, CoMoO x system doped developed with different 3 d ‐orbital atoms M (V, Ni, Zn, Mn) to investigate the construction stabilization of V its crucial performance. In situ ex measurements along theoretical calculations demonstrate that doping adjusts bandgap between CoMo‐ ‐p orbitals, leading transfer electrons from O‐ p orbitals M‐ thereby promoting . The leads an upshifted ‐band center, optimizing desorption intermediates on ‐CoMoVO lowering energy barrier rate‐determining step (RDS), catalyst's activity. Additionally, promotes electron Co atoms, stabilizing ultimately improving stability. resulting catalyst delivered attractive (overpotential 248 mV at 10 mA cm −2 durability over 600 h. This study offers rational method designing efficient electrocatalysts.

Language: Английский

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Artificial Heterointerfaces with Regulated Charge Distribution of Ni Active Sites for Urea Oxidation Reaction

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: April 1, 2024

Abstract In contrast to the thermodynamically unfavorable anodic oxygen evolution reaction, electrocatalytic urea oxidation reaction (UOR) presents a more favorable thermodynamic potential. However, practical application of UOR has been hindered by sluggish kinetics. this study, hierarchical porous nanosheet arrays featuring abundant Ni‐WO 3 heterointerfaces on nickel foam (Ni‐WO /NF) is introduced as monolith electrode, demonstrating exceptional activity and stability toward UOR. The /NF catalyst exhibits unprecedentedly rapid kinetics (200 mA cm −2 at 1.384 V vs. RHE) high turnover frequency (0.456 s −1 ), surpassing most previously reported Ni‐based catalysts, with negligible decay observed during durability test lasting 150 h. Ex situ X‐ray photoelectron spectroscopy density functional theory calculations elucidate that WO interface significantly modulates local charge distribution Ni species, facilitating generation 3+ optimal affinity for interacting molecules CO 2 intermediates This mechanism accelerates interfacial Additionally, in Fourier transform infrared provides deep insights into substantial contribution sites electrocatalysis, unraveling underlying molecular‐level mechanisms. Finally, study explores direct fuel cell inspire future implementations.

Language: Английский

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Solar‐Driven Biomass Reforming for Hydrogen Generation: Principles, Advances, and Challenges

Advanced Science, Journal Year: 2024, Volume and Issue: 11(29)

Published: May 30, 2024

Abstract Hydrogen (H 2 ) has emerged as a clean and versatile energy carrier to power carbon‐neutral economy for the post‐fossil era. generation from low‐cost renewable biomass by virtually inexhaustible solar presents an innovative strategy process organic solid waste, combat crisis, achieve carbon neutrality. Herein, progress breakthroughs in solar‐powered H production are reviewed. The basic principles of solar‐driven first introduced better understanding reaction mechanism. Next, merits shortcomings various semiconductors cocatalysts summarized, strategies addressing related issues also elaborated. Then, bio‐based feedstocks reviewed with emphasis on effect photocatalysts catalytic systems performance. Of note, concurrent value‐added chemicals reforming is emphasized well. Meanwhile, emerging photo‐thermal coupling that shows grand prospect maximally utilizing entire spectrum discussed. Further, direct utilization hydrogen green reductant producing via reactions highlighted. Finally, challenges perspectives photoreforming toward envisioned.

Language: Английский

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Structural engineering of metal oxyhydroxide for electrochemical energy conversion and storage

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 513, P. 215880 - 215880

Published: April 30, 2024

Language: Английский

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Nickel Hydroxide‐Based Electrocatalysts for Promising Electrochemical Oxidation Reactions: Beyond Water Oxidation

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: March 20, 2024

Transition metal hydroxides have attracted significant research interest for their energy storage and conversion technique applications. In particular, nickel hydroxide (Ni(OH)

Language: Английский

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Regulating the electronic state of SnO2@NiFe-LDH heterojunction: Activating lattice oxygen for efficient oxygen evolution reaction

Fuel, Journal Year: 2024, Volume and Issue: 370, P. 131762 - 131762

Published: May 4, 2024

Language: Английский

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High‐Entropy Sulfide Catalyst Boosts Energy‐Saving Electrochemical Sulfion Upgrading to Thiosulfate Coupled with Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(48)

Published: July 31, 2024

Abstract Electrochemical sulfion oxidation reaction (SOR) offers a sustainable strategy for sulfion‐rich wastewater treatment, which can couple with cathodic hydrogen evolution (HER) energy‐saving production. However, the corrosion and passivation of sulfur species render inferior catalytic SOR performance, product, polysulfide, requires further acidification to recover cheap elementary sulfur. Here, we reported an amorphous high‐entropy sulfide catalyst CuCoNiMnCrS x nanosheets in situ growth on nickel foam (CuCoNiMnCrS /NF) SOR, achieved ultra‐low potential 0.25 V afford 100 mA cm −2 , stable electrolysis at as high 1 A h. These were endowed by manipulated chemical environments surrounding Cu + sites constructed “soft‐acid” “hard‐acid” adsorption/desorption sites, enabling synergistically boosted process during SOR. Moreover, developed electrochemical‐chemical tandem convert sulfions value‐added thiosulfate, providing good choice simultaneous utilization

Language: Английский

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