Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(11), P. 4583 - 4762

Published: Jan. 1, 2022

Replacing fossil fuels with energy sources and carriers that are sustainable, environmentally benign, affordable is amongst the most pressing challenges for future socio-economic development.

Language: Английский

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Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Language: Английский

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Surface carbon layer controllable Ni3Fe particles confined in hierarchical N-doped carbon framework boosting oxygen evolution reaction

Advanced Powder Materials, Journal Year: 2021, Volume and Issue: 1(2), P. 100020 - 100020

Published: Dec. 10, 2021

Developing high-efficiency and low-cost catalysts towards oxygen evolution reaction (OER) is extremely important for overall water splitting rechargeable metal−air batteries. Herein we propose a promising organometallic coordination polymer (OCP) induced strategy to construct hierarchical N-doped carbon framework with NiFe nanoparticles encapsulated inside (Nx[email protected]–C) as highly active stable OER catalyst. The synthesis of OCP precursor depends on the unique molecular structure iminodiacetonitrile (IDAN), which can coordinate metal ions form Ni2Fe(CN)6 prussian blue analogs (PBA) structure. Unlike previous PBA-induced methods, thickness layer covering surface core be well controlled during pyrolysis through adjusting amount IDAN, builds wonderful bridge investigating relationship between catalytic performance. Both experimental characterizations theoretical studies validate that suitable layers leads optimal activity stability. By optimizing composition, optimized Ni3[email protected]–C exhibits low overpotentials (260 ​mV at 10 ​mA ​cm−2; 320 50 ​cm−2), improved kinetics (79 dec−1), robust long-term stability, exceeds those benchmark RuO2.

Language: Английский

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Unveiling Role of Sulfate Ion in Nickel‐Iron (oxy)Hydroxide with Enhanced Oxygen‐Evolving Performance

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(38)

Published: July 2, 2021

Abstract The rational design of effective catalysts for sluggish oxygen evolution reactions (OERs) is desired but challenging. Nickel‐iron (NiFe) (oxy)hydroxides are promising pre‐electrocatalysts alkaline OER. However, OER performances limited by the slow reconstruction process to generate active species high‐valance NiFe oxyhydroxides. In this work, a sulfate ion (SO 4 2− ) modulated strategy developed boost activity (oxy)hydroxide accelerating electrochemical pre‐catalyst and stabilizing reaction intermediate OOH* during SO decorated catalyst (NF‐S0.15) fabricated via scalable anodization foam in thiourea‐dissolved electrolyte. experimental theoretical investigations demonstrate dual effect on improving performances. leaching favorable form NiFeOOH under condition. Simultaneously, residual adsorbed surface can stabilize OOH*, thus enhance As expected, NF‐S0.15 delivers an ultralow overpotential 234 mV reach current density 50 mA cm −2 , fast kinetics (27.7 dec −1 ), high stability more than 100 h. This unique insights into anionic modification could inspire development advanced electrocatalysts efficient

Language: Английский

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Graphene-Based Metal–Organic Framework Hybrids for Applications in Catalysis, Environmental, and Energy Technologies

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(24), P. 17241 - 17338

Published: Nov. 1, 2022

Current energy and environmental challenges demand the development design of multifunctional porous materials with tunable properties for catalysis, water purification, conversion storage. Because their amenability to de novo reticular chemistry, metal-organic frameworks (MOFs) have become key in this area. However, usefulness is often limited by low chemical stability, conductivity inappropriate pore sizes. Conductive two-dimensional (2D) robust structural skeletons and/or functionalized surfaces can form stabilizing interactions MOF components, enabling fabrication nanocomposites characteristics. Graphene its functional derivatives are largest class 2D possess remarkable compositional versatility, diversity, controllable surface chemistry. Here, we critically review current knowledge concerning growth, structure, graphene derivatives, MOFs, graphene@MOF composites as well associated structure-property-performance relationships. Synthetic strategies preparing tuning also comprehensively reviewed together applications gas storage/separation, catalysis (organo-, electro-, photocatalysis), electrochemical storage conversion. hybrids practical addressed, revealing areas future investigation. We hope that will inspire further exploration new energy, electronic, biomedical, photocatalysis studies on previously unreported known reveal potential "diamonds rough".

Language: Английский

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Nanostructured transition metal compounds coated 3D porous core-shell carbon fiber as monolith water splitting electrocatalysts: A general strategy

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 423, P. 130279 - 130279

Published: May 12, 2021

Language: Английский

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Transition metal carbide‐based nanostructures for electrochemical hydrogen and oxygen evolution reactions

EcoEnergy, Journal Year: 2023, Volume and Issue: 1(2), P. 344 - 374

Published: Dec. 1, 2023

Abstract Extensive consumption of limited fossil fuel resources generates serious environmental problems, such as release large amounts the greenhouse gas CO 2 . It is, therefore, urgently necessary to look for alternative energy meet increasing demands. Hydrogen is a clean, environmentally friendly, and sustainable source. Electrochemical water splitting one cleanest greenest technologies available hydrogen production. Unfortunately, large‐scale electrolysis hindered by high costs catalysts, since noble metal‐based materials have been demonstrated be best catalysts (e.g., Pt cathode Ru/Ir‐oxide anode catalyst). Recently, transition metal carbides (TMCs) drawn significant attention use in electrochemical splitting, especially evolution reactions, owing their intrinsic catalytic activities, extraordinary electrical conductivities, abundant source materials. TMCs exhibit Pt‐like electronic structures are considered suitable alternatives Pt. This review systematically summarizes recent advances uses representative oxygen reactions highlights advantages electrocatalytic effects provided nanostructuring. Finally, existing challenges future perspectives these electrocatalysts discussed.

Language: Английский

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Phase Evolution on the Hydrogen Adsorption Kinetics of NiFe‐Based Heterogeneous Catalysts for Efficient Water Electrolysis

Small Methods, Journal Year: 2023, Volume and Issue: 7(4)

Published: Feb. 19, 2023

Transition metal layered double hydroxides, especially nickel-iron hydroxide (NiFe-LDH) shows significant advancement as efficient oxygen evolution reaction (OER) electrocatalyst but also plays a momentous role precursor for NiFe-based hydrogen (HER) catalysts. Herein, simple strategy developing Ni-Fe-derivative electrocatalysts via phase of NiFe-LDH under controllable annealing temperatures in an argon atmosphere is reported. The optimized catalyst annealed at 340 o C (denoted NiO/FeNi3 ) exhibits superior HER properties with ultralow overpotential 16 mV@10 mA cm-2 . Density functional theory simulation and situ Raman analyses reveal that the excellent can be attributed to strong electronic interaction interface metallic FeNi3 semiconducting NiO, which optimizes H2 O H adsorption energies OER catalytic processes. This work will provide rational insights into subsequent development related other corresponding compounds LDH-based precursors.

Language: Английский

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Recent advances in doped ruthenium oxides as high-efficiency electrocatalysts for the oxygen evolution reaction

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(28), P. 15506 - 15521

Published: Jan. 1, 2021

Recent progress in doped ruthenium oxides as high-efficiency electrocatalysts for the OER, which various types of dopants and design strategies are summarized, with an emphasis on establishment structure–activity relationship.

Language: Английский

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Recent Advances on Transition‐Metal‐Based Layered Double Hydroxides Nanosheets for Electrocatalytic Energy Conversion

Advanced Science, Journal Year: 2023, Volume and Issue: 10(13)

Published: March 3, 2023

Abstract Transition‐metal‐based layered double hydroxides (TM‐LDHs) nanosheets are promising electrocatalysts in the renewable electrochemical energy conversion system, which regarded as alternatives to noble metal‐based materials. In this review, recent advances on effective and facile strategies rationally design TM‐LDHs electrocatalysts, such increasing number of active sties, improving utilization sites (atomic‐scale catalysts), modulating electron configurations, controlling lattice facets, summarized compared. Then, these fabricated for oxygen evolution reaction, hydrogen urea oxidation nitrogen reduction small molecule oxidations, biomass derivatives upgrading is articulated through systematically discussing corresponding fundamental principles reaction mechanism. Finally, existing challenges density catalytically future prospects nanosheets‐based each application also commented.

Language: Английский

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