Enhancing photocatalytic H2O2 production with Au co-catalysts through electronic structure modification

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 13, 2024

Abstract Gold-based co-catalysts are a promising class of materials with potential applications in photocatalytic H 2 O production. However, current approaches Au show limited production due to intrinsically weak adsorption at the site. We report an approach strengthen sites, and improve production, through formation electron-deficient δ+ sites by modifying electronic structure. In this case, we synthesis TiO /MoS x -Au, following selective deposition onto MoS surface which is then further anchored . that catalyst achieves significantly increased rate 30.44 mmol g −1 h -saturated solution containing ethanol. Density functional theory calculations X-ray photoelectron spectroscopy analysis reveal mediator induces thereby decreasing antibonding-orbital occupancy Au-O ads subsequently enhancing adsorption. This strategy may be useful for rationally designing structure surfaces facilitate artificial photosynthesis.

Язык: Английский

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Metal Sulfide S‐Scheme Homojunction for Photocatalytic Selective Phenylcarbinol Oxidation

Advanced Science, Год журнала: 2024, Номер 11(17)

Опубликована: Фев. 28, 2024

Abstract Metal sulfide‐based homojunction photocatalysts are extensively explored with improved photocatalytic performance. However, the construction of metal S‐scheme remains a challenge. Herein, fabrication 2D CdIn 2 S 4 nanosheets coated 3D octahedra (referred to as 2D/3D n‐CIS/o‐CIS) photocatalyst is reported by simply adjustment polyvinyl pyrrolidone amount during solvothermal synthesis. The formation within n‐CIS/o‐CIS systematically investigated via series characterizations, which can generate an internal electric field facilitate separation and migration photogenerated electron‐hole pairs. composite exhibits significantly activity stability in selective oxidation phenylcarbinol (PhCH OH) benzaldehyde (PhCHO) when compared pure n‐CIS o‐CIS samples under visible light irradiation. It hoped that this work contribute novel insights into development sulfides for solar energy conversion.

Язык: Английский

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Construction of Co9S8/MoS2/Ni2P double S-scheme heterojunction for enhanced photocatalytic hydrogen evolution

Surfaces and Interfaces, Год журнала: 2023, Номер 42, С. 103353 - 103353

Опубликована: Сен. 4, 2023

Язык: Английский

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Photoelectron “Bridge” in Van Der Waals Heterojunction for Enhanced Photocatalytic CO₂ Conversion Under Visible Light

Advanced Materials, Год журнала: 2023, Номер 35(38)

Опубликована: Июнь 26, 2023

Constructing Van der Waals heterojunction is a crucial strategy to achieve excellent photocatalytic activity. However, in most heterojunctions synthesized by ex situ assembly, electron transfer encounters huge hindrances at the interface between two components due large spacing and potential barrier. Herein, phosphate-bridged of cobalt phthalocyanine (CoPc)/tungsten disulfide (WS2 ) bridged phosphate (xCoPc-nPO4- -WS2 designed prepared traditional wet chemistry method. By introducing small molecule into CoPc WS2 , creates an "bridge", resulting compact combination eliminating space Therefore, (PO4- bridge can serve as efficient channel efficiently transmit photoelectrons from under excited states. These are captured catalytic central Co2+ subsequently convert CO2 molecules CO CH4 products, achieving 17-fold enhancement on 3CoPc-0.6PO4- sample compared that pure . Introducing "bridge" create provides new perspective designing photocatalysts for reduction valuable products.

Язык: Английский

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Construction of S-scheme MIL-101(Fe)/Bi2MoO6 heterostructures for enhanced catalytic activities towards tetracycline hydrochloride photodegradation and nitrogen photofixation

Solar Energy, Год журнала: 2023, Номер 264, С. 112042 - 112042

Опубликована: Сен. 27, 2023

Язык: Английский

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Ultrafast electron transfer from CdS quantum dots to atomically-dispersed Pt for enhanced H2 evolution and value-added chemical synthesis

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 340, С. 123196 - 123196

Опубликована: Авг. 21, 2023

Язык: Английский

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S-scheme heterojunction photocatalysts: Mechanism, challenges and opportunities

Coordination Chemistry Reviews, Год журнала: 2024, Номер 521, С. 216177 - 216177

Опубликована: Авг. 29, 2024

Язык: Английский

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Bifunctional g-C3N4 nanospheres/CdZnS QDs S-scheme photocatalyst with boosted H2 evolution and furfural synthesis mechanism

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 358, С. 124459 - 124459

Опубликована: Июль 29, 2024

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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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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