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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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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Active Sites Engineered Bimetallic Iron–Vanadium Oxide (FeVO_x) Thin Film Electrocatalyst for Efficient and Sustainable Water Oxidation

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 7292 - 7301

Published: March 28, 2024

Designing a cost-effective and highly active thin film electrocatalyst is crucial for expediting the kinetics of oxygen evolution reaction (OER) clean hydrogen production via water electrolysis. Herein, we report fabrication efficient robust OER catalysts by depositing films iron–vanadium oxide (FeVOx) on nickel foam (NF) using aerosol-assisted chemical vapor deposition (AACVD). Different morphological variants FeVOx catalyst prepared within 40 to 120 min were thoroughly investigated oxidation in 1.0 M KOH solution. The corresponding electrochemical experiments validate exceptional performance FeVOx-40 catalyst, as current density sharply increases from 10 1000 mA cm–2 narrow overpotential range 270–330 mV (vs RHE). Moreover, this retains its initial morphology composition even after performing continuous operation 100 h. outstanding catalytic was credited distinctive synergy with underlying NF support, which enhanced overall conductivity system. straightforward effective bimetallic system (FeVOx/NF) enable communities develop utilize novel electrocatalysts dissociation.

Language: Английский

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Scaling Up Stability: Navigating from Lab Insights to Robust Oxygen Evolution Electrocatalysts for Industrial Water Electrolysis

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 29, 2024

Abstract In the pursuit of sustainable hydrogen production via water electrolysis, paramount importance electrocatalyst stability emerges as a defining factor for long‐term industrial viability. A thorough understanding and enhancement not only ensure extended catalyst lifetimes but also pave way consistent efficient generation. This review focuses on pivotal role in determining practical viability oxygen evolution electrocatalysts (OECs) large‐scale applications electrolysis production. The paper explores over initial activity, citing examples hypothetical scenarios. First, figures merits evaluation are explained along with available benchmarking protocols evaluation. Further, text delves into various strategies that can enhance which include self‐healing/regeneration pathway, reaction (OER) mechanism optimization to achieve highly stable OER stabilization active metals atoms within inhibit dissolution forward application. interplay stability, cost is suit application electrocatalyst. Lastly, it outlines challenges, prospects, future directions, presenting guide advancing OECs generation landscape.

Language: Английский

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LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(2), P. 1536 - 1547

Published: Jan. 12, 2024

Multifunctional ABO3 perovskite oxide nanomaterial was found to be an exceptional electrocatalyst for the oxygen evolution reaction (OER), a key anodic in water electrolysis. To modify properties of electrocatalysts, different activation strategies have been used recent years. This study uses combination two strategies, namely, doping and nanocomposite fabrication, generate as OER. Here, we demonstrated this by synthesizing LaFeO3 nanoparticles with percentages cobalt on B-site using sol–gel method. The smaller Co ions Fe sites led lattice distortion compression crystal lattice, leading microstrains at grain boundaries formation surface defects. Researchers then anchored composition-optimized doped LaFe0.8Co0.2O3 onto nickel hydroxide (Ni(OH)2) nanoflowers alpha phase situ hydrothermal treatment, resulting LaFe0.8Co0.2O3/Ni(OH)2 (LFCO-0.2/Ni(OH)2) nanocomposite. hybrid showed low overpotential 329 mV j = 10 mA/cm2 small Tafel slope 95 dec–1 increased activity is attributed texture construction 2D Ni(OH)2 decorated synergistic effect between them. synthesized LFCO-0.2/Ni(OH)2 composite features large number active area, excellent catalytic activity. approach paves change direction rational design composites nanomaterials defect engineering superior OER performance.

Language: Английский

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Pushing the Operation Current Density of Alkaline Water Oxidation above 1 A cm² via Electrocatalyst Engineering

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(39)

Published: Aug. 6, 2024

Abstract Rapid cost reduction of green hydrogen is essential for the large‐scale deployment hydrogen‐based energy system. A major component in achieving this development advanced water electrolyzers. Sluggish oxygen evolution reaction (OER) bottleneck electrolysis, and tremendous efforts have been devoted to develop electrocatalysts that accelerate OER kinetics. Recent advances highlighted potential precious metal‐free electrocatalyst capable stable operation at current densities above 1 cm 2 . This brings an opportunity constructing new‐generation electrolyzer with lower higher productivity. However, such high operating presents new challenges. review summarize recent progress high‐performance catalysts, identifies key factors can be leveraged enhance catalyst activity. These include interface/surface engineering, amorphous crystal phase coupling, hierarchical structure design, structural reconstruction conversion, entropy catalyst, defect engineering. Additionally, pressing challenges largely ignored previous research addressed, as sustaining long‐term stability under crucial conditions, disadvantages immobilized powder electrocatalysts, electrode scale necessity designing innovative cell designs advance characterization techniques.

Language: Английский

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Hydrogen evolution electrodes: Materials and mechanisms in alkaline electrolysis

Desalination, Journal Year: 2024, Volume and Issue: 586, P. 117887 - 117887

Published: June 28, 2024

Language: Английский

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Single Entity Electrocatalysis

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(15), P. 9015 - 9080

Published: July 17, 2024

Making a measurement over millions of nanoparticles or exposed crystal facets seldom reports on reactivity single nanoparticle facet, which may depart drastically from ensemble measurements. Within the past 30 years, science has moved toward studying atoms, molecules, and nanoparticles, one at time. This shift been fueled by realization that everything changes nanoscale, especially important industrially relevant properties like those to electrocatalysis. Studying nanoscale entities, however, is not trivial required development new tools. review explores tale clever use old tools study electrocatalysis entity level. We explore in detail complex interrelationship between method, electrocatalytic material, reaction interest (e.g., carbon dioxide reduction, oxygen hydrazine oxidation, etc.). end with our perspective future key focus what types measurements present greatest opportunity for fundamental discovery.

Language: Английский

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An efficient Fe2Se3/Fe2O3 heterostructure electrocatalyst for oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 52, P. 1290 - 1297

Published: Nov. 16, 2023

Language: Английский

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High-Performance NiO/GCN Nanohybrids Synthesized under Different Thermal Conditions for Efficient Electrocatalytic Oxygen Evolution Reaction

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: unknown

Published: April 10, 2024

Advancements in renewable energy technologies heavily depend on effective electrocatalysis, and the exploration of hybrid nanomaterials shows great potential for achieving improved catalytic performance. This research delves into synthesis characterization nanohybrids incorporating graphitic carbon nitride (GCN) nickel oxide (NiO) under varying thermal conditions oxygen evolution reaction (OER). A coprecipitation method produced nanocomposite, analyzed through various techniques. NiO/GCN synthesized at lower temperatures displayed superior activity, attributed to well-defined biotite muscovite structure promoting efficient charge transfer. Higher led reduced efficiency due agglomeration-induced restricted active site accessibility. 400 °C composite exhibited outstanding electrocatalytic activity with low overpotential, high current density, durability. In a 24 h chronoamperometry study, glassy (GC) modified electrode demonstrated commendable durability, requiring only 261 mV overpotential density 10 mA/cm2 modest Tafel slope 69.62 decade.

Language: Английский

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