Plasmon coupling inside 2D-like TiB2 flakes for water splitting half reactions enhancement in acidic and alkaline conditions

Zabelina, Anna; Милютина, Елена; Zabelin, D.; Burtsev, Vasilii; Buravets, Vladislav; Elashnikov, Roman; Neubertova, Viktorie; Šťastný, Martin; Popelková, Daniela; Lančok, J.; Chertopalov, Sergii; Paidar, Martin; Trelin, Andrii; Michalcová, Alena; Švorčı́k, Václav; Lyutakov, Oleksiy

doi:10.1016/j.cej.2022.140441

Cited by 16 publications

(8 citation statements)

References 71 publications

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“…The SPP created on the metal grating structure exhibits a much lower enhancement factor compared to the LSPR, while a more homogeneous distributed electric field. As previously reported, the enhancement of the electromagnetic field is correlated with the geometry of the prepared structure, and the composite structure of metal particles and gratings would lead to the efficient coupling of SPP supported by grating with LSPR excited by metal nanoparticles. , In this work, the significantly enhanced electric field from FDTD simulations indicates that the Ag-NPs@Au-NG can excite both LSPR and SPP effects because of the presence of nanogaps between the neighboring Ag-NPs and the periodic nature of the neighboring Au nanograting. As a double resonance SERS system, the fabricated Ag-NPs@Au-NG hybrid structure can provide a more homogeneous distribution and higher electric field intensity, leading to a uniform and high SERS response.…”

Section: Resultssupporting

confidence: 66%

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Zhang,

Li,

Meng

et al. 2024

Anal. Chem.

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Surface-enhanced Raman scattering (SERS) is a powerful analytical technique for chemical identification, but it remains a great challenge to realize the large-scale and well-controlled fabrication of sensitive and repeatable SERS substrates. Here, we report a facile strategy to fabricate centimeter-sized periodic Au nanograting (Au-NG) decorated with well-arranged Ag nanoparticles (Ag-NPs) (denoted as Ag-NPs@Au-NG) as a three-dimensional (3D) flexible hybrid SERS substrate with high sensitivity and good reproducibility. The Au-NG patterns with periodic ridges and grooves are fabricated through nanoimprint lithography by employing a low-cost digital versatile disc (DVD) as a master mold, and the Ag-NPs are assembled by a well-controlled interface self-assembly method without any coupling agents. Multiple coupling electromagnetic field effects are created at the nanogaps between the Ag-NPs and Au-NG patterns, leading to high-density and uniform hot spots throughout the substrate. As a result, the Ag-NPs@Au-NG arrays demonstrate an ultrahigh SERS sensitivity as low as 10 −13 M for rhodamine 6G with a high average enhancement factor (EF) of 1.85 × 10 8 and good signal reproducibility. For practical applications, toxic organic pollutants including crystal violet, thiram, and melamine have been successfully detected with high sensitivity at a low detection limit, showing a good perspective in the rapid detection of toxic organic pollutants.

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Section: Resultssupporting

confidence: 66%

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Zhang,

Li,

Meng

et al. 2024

Anal. Chem.

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“…Characterization and control experiments of the created materials (Figures S1–S3 and related discussion) indicate that all AuNPs are deposited on the TiB 2 surface, and there are no free-standing AuNPs in the solution. After carefully washing the TiB 2 @AuNP materials, the flakes were deposited on the surface of the plasmon-active grating using the previously optimized route . Due to the regularly patterned surface (Figure S4), the gold grating surface can support the excitation of SPP, which manifests itself as an absorption band located near 700 nm (Figure S5).…”

Section: Resultsmentioning

confidence: 99%

“…After carefully washing the TiB 2 @AuNP materials, the flakes were deposited on the surface of the plasmon-active grating using the previously optimized route. 32 Due to the regularly patterned surface (Figure S4), the gold grating surface can support the excitation of SPP, which manifests itself as an absorption band located near 700 nm (Figure S5). In turn, the immobilized AuNPs are responsible for the excitation of LSP, located near 550 nm (Figure S3B).…”

Section: Resultsmentioning

confidence: 99%

“…The LSV curves in the Ar-saturated solution are also slightly sensitive to LSP− SPP triggering (Figure 3B), where the observation corresponds to the results of our preliminary work (such a phenomenon was also observed for pristine Au grating; Figure S10). 32 However, the saturation of the reaction mixture with nitrogen significantly affects the shape of the LSV curves. In this case, the electrochemical process starts at a lower potential (−0.21 V versus RHE) and proceeds with higher efficiency (the current density increases with increasing potential in a more shape manner).…”

Section: Photoelectrochemical Experimentsmentioning

confidence: 99%

“…In the development of hybrid materials for plasmon-assisted NRR (i.e., materials constructed from redox and plasmon-active parts), the main attention is focused on the “redox” part, while the design of plasmonic (nano)structures often goes unnoticed. On the other hand, the utilization of several simple approaches, well known from alternative plasmonic applications, can significantly (up to several orders of magnitude) , increase the local value of plasmon-related energy, potentially enhancing the NRR efficiency of the carefully designed hybrid catalyst. As an example, the coupling of two nanostructures, supporting the excitation of local (LSP, localized surface plasmon) and traveled (SPP, surface plasmon polariton) plasmons, can be mentioned as the way to significant local energy increase.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen Photoelectrochemical Reduction on TiB₂ Surface Plasmon Coupling Allows Us to Reach Enhanced Efficiency of Ammonia Production

et al. 2023

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Ammonia is one of the most widely produced chemicals worldwide, which is consumed in the fertilizer industry and is also considered an interesting alternative in energy storage. However, common ammonia production is energy-demanding and leads to high CO2 emissions. Thus, the development of alternative ammonia production methods based on available raw materials (air, for example) and renewable energy sources is highly demanding. In this work, we demonstrated the utilization of TiB2 nanostructures sandwiched between coupled plasmonic nanostructures (gold nanoparticles and gold grating) for photoelectrochemical (PEC) nitrogen reduction and selective ammonia production. The utilization of the coupled plasmon structure allows us to reach efficient sunlight capture with a subdiffraction concentration of light energy in the space, where the catalytically active TiB2 flakes were placed. As a result, PEC experiments performed at −0.2 V (vs. RHE) and simulated sunlight illumination give the 535.2 and 491.3 μg h–1 mgcat –1 ammonia yields, respectively, with the utilization of pure nitrogen and air as a nitrogen source. In addition, a number of control experiments confirm the key role of plasmon coupling in increasing the ammonia yield, the selectivity of ammonia production, and the durability of the proposed system. Finally, we have performed a series of numerical and quantum mechanical calculations to evaluate the plasmonic contribution to the activation of nitrogen on the TiB2 surface, indicating an increase in the catalytic activity under the plasmon-generated electric field.

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Plasmon‐Mediated Organic Photoelectrochemistry Applied to Amination Reactions

Buravets,

Gorin,

Burtsev

et al. 2024

ChemPlusChem

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Organic electrochemistry is currently experiencing an era of renaissance, which is closely related to the possibility of carrying out organic transformations under mild conditions, with high selectivity, high yields, and without the use of toxic solvents. Combination of organic electrochemistry with alternative approaches, such as photo‐chemistry was found to have great potential due to induced synergy effects. In this work, we propose for the first time utilization of plasmon triggering of enhanced and regio‐controlled organic chemical transformation performed in photoelectrochemical regime. The advantages of the proposed route is demonstrated in the model amination reaction with formation of C−N bond between pyrazole and substituted benzene derivatives. Amination was performed in photo‐electrochemical mode on the surface of plasmon active Au@Pt electrode with attention focused on the impact of plasmon triggering on the reaction efficiency and regio‐selectivity. The ability to enhance the reaction rate significantly and to tune products regio‐selectivity is demonstrated. We also performed density functional theory calculations to inquire about the reaction mechanism and potentially explain the plasmon contribution to electrochemical reaction rate and regioselectivity.

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Plasmon coupling inside 2D-like TiB2 flakes for water splitting half reactions enhancement in acidic and alkaline conditions

Cited by 16 publications

References 71 publications

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Nitrogen Photoelectrochemical Reduction on TiB₂ Surface Plasmon Coupling Allows Us to Reach Enhanced Efficiency of Ammonia Production

Plasmon‐Mediated Organic Photoelectrochemistry Applied to Amination Reactions

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Plasmon coupling inside 2D-like TiB2 flakes for water splitting half reactions enhancement in acidic and alkaline conditions

Cited by 16 publications

References 71 publications

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Ag Nanoparticles@Au Nanograting Array as a 3D Flexible and Effective Surface-Enhanced Raman Scattering Substrate

Nitrogen Photoelectrochemical Reduction on TiB2 Surface Plasmon Coupling Allows Us to Reach Enhanced Efficiency of Ammonia Production

Plasmon‐Mediated Organic Photoelectrochemistry Applied to Amination Reactions

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Nitrogen Photoelectrochemical Reduction on TiB₂ Surface Plasmon Coupling Allows Us to Reach Enhanced Efficiency of Ammonia Production