RuxMoS2 interfacial heterojunctions achieve efficient overall water splitting and stability in both alkaline and acidic media under large current density exceeding 100 mA cm-2

Molecular Catalysis, Год журнала: 2024, Номер 570, С. 114710 - 114710

Опубликована: Ноя. 22, 2024

Язык: Английский

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Preparation and characterization of bifunctional 1T-2H MoS2-Sv/CuS catalyst for electrocatalytic hydrogen and oxygen evolution reaction

Separation and Purification Technology, Год журнала: 2024, Номер 352, С. 128176 - 128176

Опубликована: Май 29, 2024

Язык: Английский

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Enriching the active sites of nanosheets assembled as flower-like MoS2 microstructure by controllable morphology for electrochemical hydrogen evolution reaction

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 82, С. 47 - 52

Опубликована: Июль 30, 2024

Язык: Английский

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Unveiling the Electrocatalytic Performances of the Pd-MoS2 Catalyst for Methanol-Mediated Overall Water Splitting

Inorganics, Год журнала: 2025, Номер 13(1), С. 21 - 21

Опубликована: Янв. 15, 2025

Herein, this work elucidates the synthesis of Pd-MoS2 catalyst for application in methanol-mediated overall water splitting. The scanning electron microscope (SEM) and transmission (TEM) pictures offer an exciting nanostructured shape Pd-MoS2, depicting a high surface area. Further, high-resolution TEM (HRTEM) confirm lattice plane (100), spacing (0.26 nm), hexagonal crystal structure Pd-MoS2. Moreover, high-angle annular dark-field (HAADF) images related color maps disclose Mo, S, Pd elements exhibits lower overpotentials 224.6 mV [methanol-mediated hydrogen evolution reaction (MM-HER)] at −10 mA cm−2 133 oxygen (MM-OER)] 10 cm−2. illustrates noteworthy stability 15.5 h MM-HER 18 MM-OER by chronopotentiometry test. Excitingly, Pd-MoS2∥Pd-MoS2 cell reveals small potential 1.581 V compared to MoS2∥MoS2 (1.648 V) In addition, combination brilliant durability over

Язык: Английский

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Review of Extrinsic Factors That Limit the Catalytic Performance of Transition Metal Dichalcogenides (TMDs) in Hydrogen Evolution Reactions (HER)

ChemElectroChem, Год журнала: 2024, Номер 11(17)

Опубликована: Авг. 8, 2024

Abstract Transition metal dichalcogenides (TMDs) have garnered attention as potential catalysts for water splitting owing to their unique structures, diverse electronic properties, and composition from earth‐abundant elements. While certain TMD catalysts, notably MoS 2 , shown promising activity hydrogen evolution reactions (HER), achieving performance comparable traditional platinum remains a challenge. significant effort has been invested into understanding the effect of TMD's structural such defectiveness crystalline phases, recent work emphasized role extrinsic factors on HER. This review summarizes current impact commonly overlooked electrocatalytic effects that exhibit an enhanced importance in TMD‐based By combining advances theoretical modeling experimental work, we dominating including resistance, interfacial barriers, surface roughness, oxidation, valence impurities. Our aims provide insights optimizing TMDs highly efficient HER, facilitating future advancements generation technology.

Язык: Английский

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Synergistic Doping and Sulfur Vacancy Engineering in 1T-MoS2 to influence the performance of Hydrogen Evaluation Reaction

Materials Today Communications, Год журнала: 2024, Номер unknown, С. 110708 - 110708

Опубликована: Окт. 1, 2024

Язык: Английский

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Nd-Doped MoS₂Nanosheets with Sulfur Vacancies as Catalysts for Hydrogen Evolution

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

A key challenge in the field of hydrogen evolution reaction (HER) is to develop catalysts that not only perform well pure alkaline conditions but also maintain high efficiency simulated seawater, which poses additional complexities due presence salts. This study introduces Nd-doped MoS2 nanosheets on carbon cloth (Mo1–xNdxS2⊥CC) as a high-performance electrocatalyst tailored for HER both saltwater and water. The optimized catalyst demonstrates an exceptional overpotential 112 mV at current density 10 mA/cm2, significantly lower than 235 exhibited by pristine under same conditions. Density functional theory (DFT) calculations experimental data indicate Nd doping enhances catalytic performance creating oxophilic sites improve water adsorption dissociation, modulating electronic structure accelerate Volmer Heyrovsky kinetics. Additionally, sulfur vacancy (Sv) further strengthens interaction between S, enhancing activation lowering dissociation barrier. maintains over 95% its initial activity after 48 h operation underscoring excellent stability effectiveness. These advancements design address pressing need robust variable electrolytes underscore broader applicability metal-doped other transition metals like Ru, Mn, Fe, potentially across diverse operational environments.

Язык: Английский

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Decoding the Hume–Rothery Rule in a Bifunctional Tetra-metallic Alloy for Alkaline Water Electrolysis

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

The 90-year-old Hume–Rothery rule was adapted to design an outstanding bifunctional tetra-metallic alloy electrocatalyst for water electrolysis. Following the radius mismatch principles, Fe (131 pm) and Ni (124 are selectively incorporated at Pd (139 site of Mo0.30Pd0.70 nanosheets. Analogously, Cu (132 alloys with only Pd, while Ag (145 both Mo (154 pm). face-centered cubic Mo0.30Pd0.35Ni0.23Fe0.12 nanosheets 10–12 atomic layers, featuring in-plane compressive strain along {111} basal plane, show 1/3 (422) reflection from local hexagonal symmetry. more electronegative attracts electron density Ni/Fe in Mo0.30Pd0.35Ni0.23Fe0.12, synergistically boosting mass activities hydrogen oxygen evolution reactions 89 ± 5 38.6 3.1 A g–1 ±400 mV versus RHE, respectively. Full electrolysis continues ≥550 h, requiring cell voltages 1.51 1.63 V 10 100 mA cm–2, delivering 45 mL h–1 green H2.

Язык: Английский

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Pd–MoS2/CoS2@Carbon nanostructure as cathode catalyst for proton exchange membrane water electrolyser

International Journal of Hydrogen Energy, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Ru-Doped Induced Phase Engineering of MoS2 for Boosting Electrocatalytic Hydrogen Evolution

Nanomaterials, Год журнала: 2025, Номер 15(10), С. 777 - 777

Опубликована: Май 21, 2025

Electrochemical hydrogen evolution reaction (HER) holds great potential as a sustainable strategy for green production. However, it still faces significant challenges due to the lack of highly efficient electrocatalysts. Herein, synergistic approach by incorporating Ru atoms into MoS2 nanosheets optimize structure and conductivity has been proposed, which could improve HER performance under alkaline conditions. Combining theoretical calculations structural characterizations, is demonstrated that atom introduction leads localized distortions MoS2, generating additional active sites H* adsorption, reduces free energy adsorb desorb hydrogen. Furthermore, makes partial transformation from 2H phase 1T in results change electronic further enhances electrical conductivity. As result, Ru-doped electrocatalysts exhibit high activities with low overpotentials 61 mV 79 at 10 mA cm−2 1.0 M KOH seawater, respectively. This work provides novel design enhancing activity through modulation properties, offering valuable insights development evolution.

Язык: Английский

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