Transition Metal‐Based Catalysts for Urea Oxidation Reaction (UOR): Catalyst Design Strategies, Applications, and Future Perspectives

Advanced Functional Materials, Год журнала: 2024, Номер 34(18)

Опубликована: Янв. 21, 2024

Abstract Urea oxidation reaction (UOR) has garnered significant attention in recent years as a promising and sustainable clean‐energy technology. Urea‐containing wastewater poses severe threats to the environment human health. Numerous studies hence focus on developing UOR viable process for simultaneously remediating converting it into energy. Moreover, UOR, which thermodynamic potential of 0.37 V (vs reversible hydrogen electrode, RHE), shows great promise replacing energy‐intensive oxygen evolution (OER; 1.23 vs RHE). The versatility stability urea, particularly at ambient temperatures, make an attractive alternative fuel cells. Since entails complex intermediate adsorption/desorption process, many are devoted designing cost‐effective efficient catalysts. Notably, transition metal‐based materials with regulated d orbitals have demonstrated process. However, comprehensive reviews focusing catalysts remain scarce. In light this, review aims bridge gap by offering in‐depth systematic overview cutting‐edge design strategies their diverse applications UOR. Additionally, delves status quo future directions, charting course further advancements this exciting field.

Язык: Английский

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Heterostructured electrocatalysts for the oxygen evolution reaction

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 18832 - 18865

Опубликована: Янв. 1, 2024

This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.

Язык: Английский

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Construction of an Internal Charge Field: CoS_1.097/Ni₃S₂ Heterojunction Promotes Efficient Urea Oxidation Reaction

Advanced Functional Materials, Год журнала: 2024, Номер 34(38)

Опубликована: Май 6, 2024

Abstract Urea oxidation reaction (UOR) features a lower overpotential compared to the oxygen evolution (OER) during electrolysis, facilitating hydrogen (HER) at cathode. The distribution of charge plays pivotal role in promoting adsorption and cleavage chemical groups urea molecules, which can be modulated by introducing heterostructure. Herein, CoS 1.097 /Ni 3 S 2 heterojunction grown on nickel foam is designed, serving simultaneously for UOR HER. Based density functional theory (DFT) calculations, spontaneous transfer heterointerface induces formation localized electrophilic/nucleophilic regions, intelligently adsorbing electron‐donating/electron‐withdrawing activating bonds, thereby triggering decomposition. exhibits excellent catalytic activity urea, requiring only potential 1.22 V (with an 0.85 V) achieve current 100 mA cm −2 UOR, potentials 1.27 1.57 reach densities 10 , respectively, UOR//HER electrolysis cell, maintaining good stability high 60 h. Tests real urine have demonstrated performance similar that electrolyte. This work represents nearly best transition metal‐based materials applications, promising both efficient production

Язык: Английский

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Heterojunction-Induced Local Charge Redistribution Boosting Energy-Saving Hydrogen Production via Urea Electrolysis

ACS Materials Letters, Год журнала: 2024, Номер 6(3), С. 1029 - 1041

Опубликована: Фев. 20, 2024

Substituting the oxygen evolution reaction by urea oxidation (UOR) is thermodynamically more favorable for energy-saving hydrogen production. However, UOR suffers from sluggish kinetics due to its complex six-electron transfer processes combined with conversion of complicated intermediates. Herein, LaNiO3–NiO heterojunctions successfully constructed accelerate UOR. Systematic experimental investigation and theoretical calculation endorse that self-driven local charge redistribution takes place at Janus LaNiO3/NiO interface, generating nucleophilic electrophilic regions. Such a unique structure targeted adsorption amino groups carbonyl groups, thus promoting rupture C–N bonds in urea. In addition, build-in electric field triggered heterojunction could effectively diminish stepwise energy barrier, accelerating desorption *CO2. As result, exhibits superior performance, delivering current density 10 mA cm–2 1.34 V (vs RHE). This work supplies valuable insights fundamental understanding rational construction efficient catalyst.

Язык: Английский

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Current Progress in Layered Double Hydroxide-Based Electrocatalyst for Urea Oxidation: Insights into Strategies and Mechanisms

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The urea oxidation reaction (UOR) presents a more favorable alternative to the conventional oxygen evolution (OER) for hydrogen production due its lower thermodynamic potential. This method offers advantages over traditional approaches operating conditions and potentially costs. However, complex 6-electron transfer process in UOR limits performance. Researchers are tackling this challenge by designing advanced electrocatalysts with optimized properties, such as porosity, heterostructures, controlled defects, surface functionalization, fine-tuned electronic structures. significant progress catalyst design holds promise future of clean energy technologies. In view this, layered double hydroxides (LDHs) attracting interest their potential role electrolysis synergistic cooperation metals, flexible configuration, tunable composition unique structure. review examines recent advancements synthesis LDH-based catalysts. Beyond highlighting breakthroughs catalysts, critically stresses strategies challenges towards conversion. Moreover, comprehensive approach provides valuable forward-looking perspective on research directions.

Язык: Английский

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Balancing dynamic evolution of active sites for urea oxidation in practical scenarios

Energy & Environmental Science, Год журнала: 2023, Номер 16(12), С. 6015 - 6025

Опубликована: Янв. 1, 2023

The role of single atomic Ru site for enhanced UOR performance.

Язык: Английский

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Designed nickel–cobalt-based bimetallic oxide slender nanosheets for efficient urea electrocatalytic oxidation

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 57, С. 388 - 393

Опубликована: Янв. 11, 2024

Язык: Английский

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Fe-Doped Ni₂P/NiSe₂ Composite Catalysts for Urea Oxidation Reaction (UOR) for Energy-Saving Hydrogen Production by UOR-Assisted Water Splitting

Inorganic Chemistry, Год журнала: 2024, Номер 63(19), С. 8925 - 8937

Опубликована: Апрель 29, 2024

The development of efficient urea oxidation reaction (UOR) catalysts helps UOR replace the oxygen evolution (OER) in hydrogen production from water electrolysis. Here, we prepared Fe-doped Ni2P/NiSe2 composite catalyst (Fe–Ni2P/NiSe2-12) by using phosphating-selenizating and acid etching to increase intrinsic activity active areas. Spectral characterization theoretical calculations demonstrated that electrons flowed through Ni–P–Fe–interface–Ni–Se–Fe, thus conferring high Fe–Ni2P/NiSe2-12, which only needed 1.39 V vs RHE produce current density 100 mA cm–2. Remarkably, this potential was 164 mV lower than required for OER under same conditions. Furthermore, EIS driven Fe–Ni2P/NiSe2-12 exhibited faster interfacial reactions, charge transfer, response compared OER. Consequently, can effectively prevent competition with NSOR, making it suitable UOR-assisted Notably, when electrolysis is operated at a 40 cm–2, system achieve decrease 140 traditional This study presents novel strategy splitting energy-saving production.

Язык: Английский

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Co/Co₃O₄ Heterojunctions Encased in Porous N-Doped Carbon Nanocapsules for High-Performance Cathode of Rechargeable Zinc–Air Batteries

Inorganic Chemistry, Год журнала: 2024, Номер 63(8), С. 3702 - 3711

Опубликована: Фев. 9, 2024

A long-term goal of rechargeable zinc-air batteries (ZABs) has always been to design bifunctional electrocatalysts that are robust, effective, and affordable for the oxygen reduction reaction (ORR) evolution (OER). It become a feasible method construct metal/metal oxide interfaces achieve superior electrocatalytic performance ORR OER by enhanced charge transfer. In this study, Co/Co

Язык: Английский

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Microwave-pulse synthesis of tunable 2D porous nickel-enriched LaMn_xNi_1−xO₃ solid solution for efficient electrocatalytic urea oxidation

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(12), С. 7047 - 7057

Опубликована: Янв. 1, 2024

This work proposes a microwave-pulse method for rapidly synthesizing highly tunable 2D porous nickel-enriched LaMn x Ni 1− O 3 comprehensive understanding of UOR activity mechanisms.

Язык: Английский

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