Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications

Energy & environment materials, Journal Year: 2022, Volume and Issue: 6(5)

Published: May 28, 2022

Electrochemical water splitting represents one of the most promising technologies to produce green hydrogen, which can help realize goal achieving carbon neutrality. While substantial efforts on a laboratory scale have been made for understanding fundamental catalysis and developing high‐performance electrocatalysts two half‐reactions involved in electrocatalysis, much less attention has paid doing relevant research larger scale. For example, few such researches done an industrial Herein, we review very recent endeavors bridge gaps between applications electrolysis. We begin by introducing fundamentals electrochemical then present comparisons testing protocol, figure merit, catalyst interest, manufacturing cost industry‐based water‐electrolysis research. Special is tracking surface reconstruction process identifying real catalytic species under different conditions, highlight significant distinctions corresponding mechanisms. Advances designs industry‐relevant electrolysis are also summarized, reveal progress moving practical forward accelerating synergies material science engineering. Perspectives challenges electrocatalyst design strategies proposed finally further lab‐scale large‐scale electrocatalysis applications.

Language: Английский

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Emerging materials and technologies for electrocatalytic seawater splitting

Science Advances, Journal Year: 2023, Volume and Issue: 9(42)

Published: Oct. 18, 2023

The limited availability of freshwater in renewable energy-rich areas has led to the exploration seawater electrolysis for green hydrogen production. However, complex composition presents substantial challenges such as electrode corrosion and electrolyzer failure, calling into question technological economic feasibility direct splitting. Despite many efforts, a comprehensive overview analysis electrolysis, including electrochemical fundamentals, materials, technologies recent breakthroughs, is still lacking. In this review, we systematically examine advances electrocatalytic splitting critically evaluate obstacles optimizing water supply, devices stable production from seawater. We demonstrate that robust materials innovative technologies, especially selective catalysts high-performance devices, are critical efficient electrolysis. then outline discuss future directions could advance techno-economic emerging field, providing roadmap toward design commercialization can enable efficient, cost-effective, sustainable

Language: Английский

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Self‐integration exactly constructing oxygen‐modified MoNi alloys for efficient hydrogen evolution

EcoEnergy, Journal Year: 2023, Volume and Issue: 1(2), P. 425 - 436

Published: Dec. 1, 2023

Abstract Introducing oxygen atoms into nickel‐based alloys is an effective strategy for constructing water dissociation sites hydrogen evolution reaction (HER). However, controlling content to realize the best match of and adsorption challenging. Herein, we exploit self‐integration process MoNi alloy in molten salts introduce atoms, which ultimately leads localized generation robust NiO x H y around alloys. Interestingly, Mo further doped (Mo‐NiO ) construct active center due high mobility ionic solutions. Owing covering space confinement salt, exactly decorated with Mo‐NiO nanosheets. Both physical characterization density functional theory calculation prove that electron transport, capability, are finely tuned benefited from O doping, thus greatly expediting HER kinetics. exhibits a much lower overpotential 33 mV at 10 cm −2 alkaline electrolyte, even superior Pt/C benchmark. Moreover, final requires low 57 acidic media. This enhancement ascribed successful assembly foam elicited by salt.

Language: Английский

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Electronic structure engineering for electrochemical water oxidation

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(38), P. 20218 - 20241

Published: Jan. 1, 2022

Strategies for regulating the electronic structure of transition-metal-based electrocatalysts through doping, heterostructure, oxygen vacancies, alloy, and strain engineering are investigated.

Language: Английский

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Ni3S2-embedded NiFe LDH porous nanosheets with abundant heterointerfaces for high-current water electrolysis

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 442, P. 136105 - 136105

Published: April 1, 2022

Language: Английский

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Revealing Spin Magnetic Effect of Iron-Group Layered Double Hydroxides with Enhanced Oxygen Catalysis

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(2), P. 1431 - 1440

Published: Jan. 9, 2023

The oxygen evolution reaction (OER) is the bottleneck limiting process of water splitting. OER involves recombination from diamagnetic singlet state OH or H2O to paramagnetic triplet O2. spin conservation for oxygenated intermediates must play an important role in OER. However, dynamic mechanism magnetic field-induced polarization still its infancy. Herein, based on spin-coupling interaction iron group elements, three typical layered double hydroxides (LDHs) were constructed study relationship among field, polarization, and activity. Combining experimental theoretical studies, we revealed spin-magnetic effect LDHs enhancing process. There a positive correlation between saturation magnetization performance under different fields. NiCoFe-LDHs (NCFL) endows strongest activity (η10 = 230 mV) (Ms 44 emu mg–1) compared with that CoFe-LDHs (CFL, η10 372 mV, Ms 21 NiFe-LDHs (NFL, 246 29 mg–1). density functional theory calculations show Fe sites NCFL endow stronger OH, Raman spectroscopy further proves promotion formation O–O bond NCFL. Applying external due LDHs, enhancement amplitude also positively correlated magnetism catalyst. has about −34.8 mV T–1 NFL (−27.0 T–1) CFL (−16.7 T–1). overpotential only 206 condition 700 mT field. In conclusion, demonstrate underlying influence provide insights into catalysts intermediates. These would help understand design at spintronic level.

Language: Английский

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Modulation of active surface sites on Ni–Fe–S by the dynamic hydrogen bubble template method for energy-saving hydrogen production

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(15), P. 9038 - 9054

Published: Jan. 1, 2024

A porous structure was electrosynthesized via a DHBT with interconnected nanosheets. The fabricated electrode demonstrated great activity for the UOR and HER.

Language: Английский

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Lattice-mismatched MOF-on-MOF nanosheets with rich oxygen vacancies show fast oxygen evolution kinetics for large-current water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125105 - 125105

Published: Jan. 1, 2025

Language: Английский

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Magnetic field assisted electrocatalytic oxygen evolution reaction of nickel-based materials

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 10(4), P. 1760 - 1767

Published: Dec. 14, 2021

The dominant role of the magnetoresistance effect caused by spin electron scattering in oxygen evolution reaction is unveiled through an situ tunable magnetic field-electrochemical testing system.

Language: Английский

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Sulfate-Decorated Amorphous–Crystalline Cobalt-Iron Oxide Nanosheets to Enhance O–O Coupling in the Oxygen Evolution Reaction

ACS Nano, Journal Year: 2022, Volume and Issue: 17(1), P. 825 - 836

Published: Dec. 23, 2022

The electrochemical oxygen evolution reaction (OER) plays a fundamental role in several energy technologies, which performance and cost-effectiveness are large part related to the used OER electrocatalyst. Herein, we detail synthesis of cobalt-iron oxide nanosheets containing controlled amounts well-anchored SO42- anionic groups (CoFexOy-SO4). We use cobalt-based zeolitic imidazolate framework (ZIF-67) as structural template cobalt source Mohr's salt ((NH4)2Fe(SO4)2·6H2O) iron sulfate. When combining ZIF-67 with ammonium sulfate, protons produced by ion hydrolysis (NH4+ + H2O = NH3·H2O H+) etch ZIF-67, dissociating its polyhedron structure, form porous assemblies two-dimensional nanostructures through diffusion-controlled process. At same time, ions partially replace within anchored on material surface exchange organic ligands. As result, ultrathin CoFexOy-SO4 obtained. proposed synthetic procedure enables controlling amount Fe SO4 analyzing effect each element electrocatalytic activity. optimized displays outstanding activity 10 mA cm-2 overpotential 268 mV, Tafel slope 46.5 mV dec-1, excellent stability during 62 h. This is correlated material's chemical parameters. assembled nanosheet structure characterized electrochemically active area, high density sites, fast electron transportation. Meanwhile, introduction increases electrical conductivity catalysts provides sites optimum bond spin state for adsorption intermediates. presence sulfate at catalyst modifies electronic level regulates intermediates reduce overpotential, promotes charge transfer, accelerates formation oxygenated Overall, present work details high-efficiency electrocatalyst demonstrates nonmetallic an strategy promote conversion technologies.

Language: Английский

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