Ultrafast Charge Transfer Dynamics in Multifaceted Quaternary Te–MoTe₂–MoS₂/ZnO S-Scheme Heterostructured Nanocatalysts for Efficient Green Hydrogen Energy

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(17), С. 7325 - 7337

Опубликована: Авг. 20, 2024

Sustainable H2 energy generation through water splitting prevalently demands systematically designed multifaceted state-of-the-art catalysts. Herein, unique Te–MoTe2–MoS2/ZnO heterostructured nanocatalysts were engineered hydrothermally for photo-/electro-/photoelectrochemical functionalities probed to ascertain the catalytic efficiency toward production. Optimized 2.5% (2.5TMMZ) heterojunctions performed at an applicable standard with a production rate of 5.2 (mmol/gcat)/h 41% AQY during photochemical experiments. Fs-TAS studies confirmed delayed lifetime active charge carriers shallow and deep trap sites in heterostructure. Electrochemical corroborated remarkable HER OER activities 2.5TMMZ −0.51 0.76 V overpotentials. Photoelectrochemical investigations deciphered potential as it yielded nearly 3-fold higher photocurrent density than ZnO. To achieve equilibrium between conductivity–stability system, Te/S edge Te–MoTe2–MoS2 exhibited affinity H+ adsorption, whereas ZnO end catalyst took care photosensitization demonstrated via optoelectronic theoretical characterizations alongside S-scheme mechanism.

Язык: Английский

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Ultrafast Hole Trapping in Te‐MoTe₂‐MoSe₂/ZnO S‐Scheme Heterojunctions for Photochemical and Photo‐/Electrochemical Hydrogen Production

Small, Год журнала: 2024, Номер unknown

Опубликована: Авг. 30, 2024

Abstract Te‐MoTe 2 ‐MoSe /ZnO S‐scheme heterojunctions are engineered to ascertain the advanced redox ability in sustainable HER operations. Photo‐physical studies have established steady state transfer of photo‐induced charge carriers whereas an improved dynamics realized by state‐of‐art ultrafast transient absorption and irradiated‐XPS analysis optimized 5wt% heterostructure. 2.5, 5, 7.5wt% photocatalysts (2.5MTMZ, 5MTMZ 7.5MTMZ) exhibited 2.8, 3.3, 3.1‐fold higher performance than pristine ZnO with marvelous apparent quantum efficiency 35.09%, 41.42% 38.79% at rate 4.45, 5.25, 4.92 mmol/g cat /h, respectively. Electrochemical water splitting experiments manifest subdued 583 566 mV overpotential values 2.5MTMZ heterostructures achieve 10 mA cm −2 current density for HER, 961 793 OER, For photocatalyst, lifetime kinetic decay interfacial step is evaluated be 138.67 ps as compared 52.92 bare ZnO.

Язык: Английский

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Rational integration of MoSe2 and BN with TiO2 to design nanoengineered ternary heterojunctions for sustainable hydrogen energy: Experimental evidences and theoretical anticipations

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 82, С. 1182 - 1195

Опубликована: Авг. 7, 2024

Язык: Английский

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Superlative Porous Organic Polymers for Photochemical and Electrochemical CO₂ Reduction Applications: From Synthesis to Functionality

Langmuir, Год журнала: 2024, Номер 40(20), С. 10414 - 10432

Опубликована: Май 10, 2024

To mimic the carbon cycle at a kinetically rapid pace, sustainable conversion of omnipresent CO

Язык: Английский

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MBenes for Energy Conversion: Advances, Bottlenecks, and Prospects

Langmuir, Год журнала: 2024, Номер 40(21), С. 10835 - 10846

Опубликована: Май 13, 2024

The advent of two-dimensional layered materials has bolstered the development catalytic endeavors for energy conversion and storage. MXenes (transition metal carbides/nitrides) have already consolidated their candidature in past decade due to enhanced compositional structural tunabilities through surface modifications. Perseverant research engineering MXene based led inception MBenes borides) as promising systems energy-driven operations. Physicochemical superiorities such escalated conductivity hydrophilicity, unique geometrical domains, higher stability modulus elasticity provide reaction-friendly milieu exploit these materials. Nevertheless, on is embryonic requires thorough realization scientific significance. Herein, we aim discuss advancements, challenges, outlooks with respect HER, CO2RR, NRR applications.

Язык: Английский

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Environmental remediation through tandem hydrogenolysis of polyethylene and H2 evolution over butterfly shaped MoO3@RuO2 heterostructures

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 77, С. 1163 - 1175

Опубликована: Июнь 22, 2024

Язык: Английский

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Flatland materials for photochemical and electrochemical nitrogen fixation applications: from lab-door experiments to large-scale applicability

Sustainable Energy & Fuels, Год журнала: 2024, Номер 8(16), С. 3476 - 3495

Опубликована: Янв. 1, 2024

Flatland materials were meticulously surveyed to explore their functionality in photochemical and electrochemical nitrogen reduction reaction applications. New insights are presented for pilot-scale NRR operations via 2D materials.

Язык: Английский

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Oxygen-Evolution Reaction on Nickel Oxyhydroxide’s Surface: Toward a Super Catalyst for Oxygen-Evolution Reaction with Ultralow Overpotentials

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(11), С. 5028 - 5037

Опубликована: Май 27, 2024

This study challenges the conventional understanding of nickel (hydr)oxides as inefficient catalysts for oxygen-evolution reaction (OER) under alkaline conditions. It is demonstrated that oxyhydroxide, characterized by several methods, forms on Ni foam's surface and exhibits OER activity at extremely low potentials. becomes particularly notable peak Ni(II) oxidation to Ni(III), which follows charge accumulation. Remarkably, this mesoporous, super hydrophilic, high-surface-area catalyst requires a minimal overpotential, 130 mV, with current density 200 μA/cm2, displays Tafel slope 77.9 mV/decade in media (0.10 M KOH). Considering amount oxygen produced concentration redox-active ions redox region, turnover frequency was calculated be 1.1 × 10–3 s–1 potential 1.36 V. Achieving these parameters such remarkably overpotential holds significant promise. also proposes mechanism based situ Raman spectroscopic analysis Ni(III) region. The observed can attributed complex interplay between process phenomenon All factors result an exceptionally OER. Our findings hold profound implications development highly efficient stable electrocatalysts OER, water-splitting applications. research not only expands our oxyhydroxide but opens avenues future exploration electrocatalysis.

Язык: Английский

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The mechanistic pathway of paracetamol degradation using UV/H2O2 with PVP functionalized ZnO Nanorods

Journal of Molecular Structure, Год журнала: 2024, Номер 1317, С. 139068 - 139068

Опубликована: Июнь 24, 2024

Язык: Английский

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High entropy catalysts in electrolytic water splitting: A review from properties to applications

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155736 - 155736

Опубликована: Сен. 12, 2024

Язык: Английский

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