Vertically Oriented FeNiO Nanosheet Array for Urea and Water Electrolysis at Industrial-Scale Current Density

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(22), P. 8340 - 8352

Published: May 17, 2024

In addressing the challenging quest for an efficient electrocatalyst in electrochemical water splitting, we demonstrate Fe-doped NiO nanosheet array anchored on nickel foam synthesized via a two-step process. Demonstrating exceptional performance alkaline electrolyte, FeNiO catalysts exhibit oxygen evolution reaction with low potential of 1.52 V vs RHE and urea oxidation 1.32 @ 10 mA/cm2. The bifunctional electrolyzer generates mA/cm2 current at 1.95 1.59 electrolysis ambient temperature. Promisingly, catalyst based hydrogen industrial-scale density 400 cell voltage just 1.91 concentrated electrolyte elevated temperature (80 °C) due to dimensionally stable robust behavior self-supported catalyst. activation energy is found be 52 kJ/mol. present also 300 4 M KOH 50 °C more than 20 h. synergy induced by Fe doping into activates catalytic sites, expediting charge transfer kinetics. research report highlights as practical cost-effective approach green production splitting.

Language: Английский

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Fast charge transfer on NiS modified type-II heterojunction CdS/g-C3N4 driven by work function difference for improved photocatalytic hydrogen evolution

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 888 - 895

Published: Jan. 29, 2025

Language: Английский

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Hydrogen evolution at MoS2: rationalising the reaction mechanism and outlook for electrocatalyst development

Journal of Solid State Electrochemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract MoS 2 has seen decades of research into enhancing its electrocatalytic activity towards the Hydrogen Evolution Reaction; however, consistently, literature been undecided and often contradictory on true nature active sites. Herein, understanding sites reviewed, collating chemical evidence across using techniques such as XPS, Raman, electrochemical studies to deduce a more complete picture origins catalytic activity. A seemingly landscape rationalised, concluding that most accurate data appears back sulphur defects, thus low-coordinate Mo sites, interest, alongside demonstrating how parsing in this way can help locate agreement where only contradiction was thought reside. Following this, learning from various used their elucidation is not beneficial for future work material but also electrocatalyst development whole.

Language: Английский

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Electronic structure and photocatalytic performance of Janus MoSSe/Ga2SSe van der Waals heterostructures

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 73, P. 536 - 546

Published: June 12, 2024

Language: Английский

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Regulation of Ni3S2@NiS Heterostructure Grown on Industrial Nickel Net for Improved Electrocatalytic Hydrogen Evolution

Catalysts, Journal Year: 2025, Volume and Issue: 15(2), P. 136 - 136

Published: Feb. 1, 2025

A novel all-in-one catalytic electrode containing a Ni3S2@NiS heterostructure (Ni3S2@NiS/Ni-Net) was in situ synthesized on an industrial nickel net (Ni-Net) using one-step solvothermal method, which ethanol the solvent and thioacetamide sulfur source, respectively. The effects of addition amount source composition, morphology, electronic structure heterostructures their electrocatalytic hydrogen evolution reaction (HER) activities were investigated. When 2 mmol introduced, prepared Ni3S2@NiS/Ni-Net with nanorod-like required overpotentials 207 322 mV to drive current densities 100 500 mA/cm2, respectively, 1 M KOH solution, only needed overpotential 429 deliver 1000 mA/cm2. Meanwhile, can operate stably at high density 90 mA/cm2 under harsh alkaline conditions for least h. results show that has activity stable HER performance density, provides new idea development high-efficiency electrodes production.

Language: Английский

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Cobalt/Vanadium Nitride Nano-Heterojunction Supported on N-Doped Nanocarbon for Alkaline Overall Water Splitting

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

Published: March 27, 2025

Language: Английский

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Hydrothermal Synthesis, Crystal Structure, and Thermal Studies of CuSb₆O₈(SO₄)₂ and Its Applications toward Dye Management, Hydrogen Evolution Reaction, and Antibacterial Studies

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Single crystals of a monophasic layered copper antimony oxy-sulfate, CuSb6O8(SO4)2, have been grown by the hydrothermal technique. SCXRD study reveals that it crystallizes in triclinic symmetry (SG: P1̅) and is comprised [SO4] tetrahedra, [SbO4E] trigonal bipyramids, [CuO4] square planar moieties. No structural phase transition was observed even upon lowering temperature up to 100 K. The structure consists [(CuO4)Sb2O5]n-[Sb2O7(SO4)]n layers along [001] connected each other through weak nonbonding interactions via oxygens tetrahedron atoms adjacent layer. It demonstrates high photocatalytic dye degradation efficiency, achieving 94.68 94.72% Methylene blue Rhodamine B presence 0.1 mL H2O2, respectively, with recyclability sixth cycle >90% efficiency. also exhibits excellent HER activity low overpotential 111 mV at 10 mA/cm2 Tafel slope 157 mV/dec 1 M KOH. compound strong antibacterial against several Gram-positive Gram-negative bacteria as investigated agar well diffusion method. TG-DTA shows good thermal stability decomposition above 273 °C. purity its consistency after photocatalysis were confirmed PXRD analysis.

Language: Английский

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Ni and VN Nanoparticles Supported on N-Doped Carbon Layer Containing Ni Single Atoms as Electrocatalyst for the Hydrogen Evolution Reaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(4), P. 4059 - 4067

Published: Feb. 12, 2024

The construction of highly active non-precious-metal electrocatalysts is the key to achieving an efficient hydrogen evolution reaction (HER). In this paper, a N-doped carbon layer composite was successfully synthesized by self-limiting domain thermal reduction strategy, in which embedded with Ni/VN heterogeneous nanoparticles and Ni metal nanoclusters as well anchored many single atoms (denoted Ni/VN/Ni-NC). optimized Ni/VN/Ni-NC provides abundance sites high conductivity facilitate charge mass transfer. And electronic structure heterostructures complementary effects 3d orbital electrons, contribute HER kinetics. exhibits excellent performance (without iR compensation) at current density 10 mA cm–2 overpotentials 84 mV (1 M KOH solution) 166 PBS solution).

Language: Английский

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Nanosheets-assembled hollow N-doped carbon nanospheres encapsulated with ultrasmall NiSe nanoparticles for electrocatalytic hydrogen evolution

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 64, P. 733 - 743

Published: April 1, 2024

Language: Английский

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FeNi₂S₄/NF as a Highly Efficient Electrocatalyst for Seawater Splitting

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(31), P. 11541 - 11549

Published: July 25, 2024

For the generation of electrolytic hydrogen, development high-performance oxygen evolution reaction (OER) electrocatalysts is crucial. This work reports a OER electrocatalyst prepared by acid etching and ion exchange strategies. Because its high adhesion, superhydrophilicity, rough surface, produced FeNi2S4/nickel foam (NF) catalyst showed exceptional performance in both alkaline electrolyte seawater electrolyte. Particularly, negatively charged sulfate layer formed FeNi2S4/NF after can effectively prevent Cl-anion poisoning catalyst. Low overpotentials 234 295 mV an saltwater are needed for to produce current densities 10 100 mA cm–2, respectively. Using this combination with efficient hydrogen catalyst, we were able achieve overall electrolysis at room temperature very good durability cm–2 low voltages 1.54 1.70 V, The has promising application effort.

Language: Английский

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