Recent strategies for improving the catalytic activity of ultrathin transition metal sulfide nanosheets toward the oxygen evolution reaction

Materials Today Energy, Год журнала: 2024, Номер 40, С. 101492 - 101492

Опубликована: Янв. 12, 2024

Язык: Английский

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An advanced PdNPs@MoS₂ nanocomposite for efficient oxygen evolution reaction in alkaline media

RSC Advances, Год журнала: 2023, Номер 13(46), С. 32413 - 32423

Опубликована: Янв. 1, 2023

In response to the increasing availability of hydrogen energy and renewable sources, molybdenum disulfide (MoS2)-based electrocatalysts are becoming increasingly important for efficient electrochemical water splitting. This study involves incorporation palladium nanoparticles (PdNPs) into hydrothermally grown MoS2via a UV light assisted process afford PdNPs@MoS2 as an alternative electrocatalyst storage conversion. Various analytical techniques, including scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), dispersive (EDS), were used investigate morphology, crystal quality, chemical composition samples. Although PdNPs did not alter MoS2 oxygen evolution reaction (OER) activity was driven at considerable overpotential. When splitting performed in 1.0 M KOH aqueous solution with (sample-2), overpotential 253 mV observed. Furthermore, OER performance highly favorable through rapid kinetics low Tafel slope 59 dec-1, well high durability stability. accordance results, sample-2 showed also lower charge transfer resistance, which again provided evidence activity. The enhanced attributed number factors, structural, surface compositions, synergistic effects between PdNPs.

Язык: Английский

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Critical Role of Interface Design in Acceleration of Overall Water Splitting and Hybrid Electrolysis Process: State of the Art and Perspectives

Energy & Fuels, Год журнала: 2023, Номер 37(11), С. 7603 - 7633

Опубликована: Май 16, 2023

Electrocatalytic water splitting to hydrogen (H2) is an ideal approach generate renewable energy. One of the major drawbacks tightly coupled kinetically sluggish and energy inefficient anodic oxygen evolution reaction (OER) with forming a cathodic half-cell which leads significant reduction in overall cell efficiency. In this context, before reviewing literature, we have first briefly analyzed energetics splitting, problems, challenges under different pH conditions can be useful for further understanding process. Replacement OER by thermodynamically favorable substrate oxidation offers flexibility, value addition, efficiency case hybrid or assisted electrolysis afford hydrogen. Recent progress terms sacrificial oxidants are discussed where so chosen that often its addition. Also here, offered insights into interface designing heterostructures modulating chemical electronic environments enhancement intrinsic catalytic activity stability. The effect incorporation such materials reaction, their active sites, interactions intermediates thoroughly explored. This review good complement better elucidation role future commercial applications.

Язык: Английский

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Cobalt nanoparticles intercalation coupled with tellurium-doping MXene for efficient electrocatalytic water splitting

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 675, С. 379 - 390

Опубликована: Июль 4, 2024

Язык: Английский

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Oxygen Evolution Reaction of Amorphous/Crystalline Composites of NiFe(OH)_x/NiFe₂O₄

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Orbital structures are strongly correlated with catalytic performance, whereas their regulation strategy is still in pursuit. Herein, the Fe 3d and O 2p orbital hybridization was optimized by controlling content of amorphous NiFe(OH)x (a-NiFe(OH)x), which grown situ on crystalline NiFe2O4 (c-NiFe2O4) using an ultrasonic reduction method. The results electron energy loss spectroscopy (EELS) X-ray absorption spectra (XAS) revealed that Fe-Oa a-NiFe(OH)x effectively strengthened jointing adjacent oxygen (Oc) c-NiFe2O4, further confirmed higher antibonding energies based density functional theory (DFT) calculations. resultant Oa-Fe-Oc at composite interface leads to balanced adsorption desorption energies. Accordingly, optimal strong 3d-O enhanced OER overpotential 150 mV, lower than pristine sample. This work represents a promising approach via introduction phase construct highly efficient catalysts.

Язык: Английский

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Self-reconstruction in self-supporting MOF-74 electrode to enhance electrocatalytic oxygen evolution

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 55, С. 796 - 804

Опубликована: Ноя. 29, 2023

Язык: Английский

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The strategies to improve TMDs represented by MoS2 electrocatalytic oxygen evolution reaction

Chinese Chemical Letters, Год журнала: 2024, Номер 35(11), С. 109515 - 109515

Опубликована: Янв. 13, 2024

Язык: Английский

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Graphdiyne oxide-sandwiched MoS2 heterostructure with sufficient hetero-interphase and highly expanded interlayer for efficient hydrogen evolution

Chemical Engineering Journal, Год журнала: 2024, Номер 484, С. 149457 - 149457

Опубликована: Фев. 10, 2024

Язык: Английский

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Supramolecular Macrocycle Regulated Single‐Atom MoS₂@Co Catalysts for Enhanced Oxygen Evolution Reaction

Energy & environment materials, Год журнала: 2024, Номер 7(5)

Опубликована: Янв. 22, 2024

The development of active water oxidation catalysts for splitting has stimulated considerable interest. Herein, the design and building single atom Co sites using a supramolecular tailoring strategy are reported, that is, introduction pillar[4]arene[1]quinone (P4A1Q) permits mononuclear species stereoelectronically assembled on MoS 2 matrix to construct an atomically dispersed @Co catalyst with modulated local electronic structure, definite chemical environment enhanced oxygen evolution reaction performance. Theoretical calculations indicate immsobilized single‐Co exhibit optimized adsorption capability oxygen‐containing intermediates, endowing excellent electrocatalytic activity, low overpotential 370 mV at 10 mA cm −2 small Tafel slope 90 dec −1 . extendable potential this other electrocatalysts such as @Ni @Zn, applications hydrogen was also demonstrated. This study affords new insights into rational metal systems

Язык: Английский

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Understanding Free-Energy Landscapes in Electrocatalysis: A Case Study on Nitrate Reduction over Au(111)

ACS electrochemistry., Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Free-energy landscapes are essential tools in electrocatalysis for assessing catalyst activity and selectivity of proton-coupled electron transfer steps. It is a common approach to focus on the thermodynamic part free-energy landscape refer only reaction intermediates, which turn leads results being highly dependent accuracy calculated binding energies adsorbed intermediates. Since evaluation electrocatalytic processes solid surfaces usually requires density functional theory calculations (DFT) with periodic boundary conditions, free energy reference molecules relevant binding-energy determination subject an inherent error. For this purpose, gas-phase error corrections have been introduced recent years, allow correction DFT error, based assessment formation enthalpies, by assigning double or triple bonds molecules. In contribution, we present simple unbiased errors: do not distinguish between bond order but correct all single, double, referring atomization compounds. We employ our nitrate reduction Au(111) as case study, using different levels exchange–correlation functionals generalized gradient meta-generalized approximation. shown that inclusion well solvation ion significantly affects energetics predictions descriptor-based analysis, highlighting importance correcting DFT-based gaining reliable insights into systems.

Язык: Английский

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