Electromagnetic induction effect induced high-efficiency hot charge generation and transfer in Pd-tipped Au nanorods to boost plasmon-enhanced formic acid dehydrogenation

Gao, Wenqiang; Liu, Qilu; Zhao, Xiao-Lei; Cui, Chao; Zhang, Shan; Zhou, Weijia; Wang, Xiaoning; Wang, Shuhua; Liu, Hong; Sang, Yuanhua

doi:10.1016/j.nanoen.2020.105543

Cited by 37 publications

(34 citation statements)

References 48 publications

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“…The above study indicates that an appropriate CTAB concentration, for example, ≈12-20 mm, is crucial for the synthesis of the Star/Cu 2−x S x nanohybrid structure. This observation is in good agreement with previous reports about the selective coating on Au nanorods, where oxides or metals can be preferentially deposited on the two ends of nanorod to form a dumbbell structure, [34,38,[43][44][45][46][47] only when the CTAB concentration is in between its 1st critical micelle concentration (CMC, 0.89 mm) and 2nd CMC (20 mm). [34,47,48] For the case with CTAB concentration smaller than its 1st CMC, the overall bilayer is less compact, [34,48] Cu 2−x S x can thus uniformly grow around the surface to form a complete thin layer; when the CTAB concentration is higher than its 2nd CMC, [34,49] the HDA-CTAB molecules on nanostar surface are highly dense, which blocks the access to solution species, obstructing the deposition of Cu 2−x S x to nanostar surface.…”

Section: Structure Formation Mechanismsupporting

confidence: 92%

Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Peng

Zhang

et al. 2021

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good transmittance through biological tissues as well as high spatial and temporal precision. [3] Recently, the second NIR window (NIR-II, 1000 nm < λ < 1700 nm) has rapidly emerged as a highly promising spectral region for in vivo studies. Compared with the first NIR window (NIR-I, 700 nm < λ < 950 nm), using NIR-II offers numerous merits, including larger penetration depth, lower optical absorption/ scattering from biological specimens, and higher maximum permissible exposure to incident laser, rendering better bioapplication potential. [4][5][6][7][8] The effect of PTT relies on the activation of photosensitizing agents upon NIR irradiation to generate heat for thermal ablation of bio-objects. [9][10][11] Conventional PTT agents, such as organic chromophore molecules, usually requires high radiation energy and high material dose due to their small extinction cross section for light absorption. [2,3,12] Very recently, plasmonic nanomaterials demonstrate distinct advantage as potential PTT agents, owning to their unique optical property of surface plasmon resonance (SPR), which can induce intense localized electric fields to enormously increase light harvesting and favor the excitation of energetic charge carriers. [13][14][15] Thanks to the SPR effect, the absorbed photons can be quickly converted into thermal energy, resulting in instantaneous local high temperature to eliminate lesions, for example, to kill cancer cells. [13][14][15][16] Plasmonic nanohybrids are promising photo energy conversion materials in photoelectronics and biomedicine, due to their unique surface plasmon resonance (SPR). Au and Cu 2−x S x nanostructures with strong SPR in the near-infrared (NIR) spectral region are classic plasmonic systems used to convert NIR photons into heat for photothermal therapy (PTT). The rational design of the Au/Cu 2−x S x nanohybrids is expected to induce better photothermal conversion; however, the construction of such hybrids via wet-chemistry methods with a well-controlled interfacial structure is still challenging. Here, the synthesis of an AuCu Star/Cu 2 −x S x nanohybrid is reported, where the Cu 2−x S x components are selectively grown on the AuCu nanostar tips to form "caps". The spatial formation of the Cu 2−x S x caps on star tips is mainly governed by surfactant concentration, tip curvature, and experimental manipulation. The nanohybrids show low cytotoxicity and superior photothermal conversion efficiency, enabling robust PTT to kill cancer cells in the second NIR window. Numerical simulation reveals that the coupling of Cu 2−x S x on nanostar tips generates strong interfacial electric field, improving photothermal conversion. Moreover, the spatial separation structure favors the continuous flow of hot charge carriers to produce active radicals, further promoting the tumor treatment effect.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202103174.

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Section: Structure Formation Mechanismsupporting

confidence: 92%

Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Peng

Zhang

et al. 2021

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“…The metal–metal AgPd catalyst loaded on 2D graphitic carbon nitride nanosheets achieved the highest formation rate (2 × 10 6 μmol g –1 h –1 ) . Furthermore, AuNPs interfaced with a metal (Pd) or semiconductor (CdS) were also capable of photocatalyzing formic acid dehydrogenation with formation rates in the order of 10 5 μmol g –1 h –1 . , However, metal–semiconductor systems were able to reach these formation rates at room temperatures, while the highest activities in metal–metal systems required temperatures between 40 and 50 °C. In addition, semiconductors are typically cheaper and more abundant than catalytic metals, indicating that metal–semiconductors systems could be preferable for this reaction over metal–metal systems.…”

Section: Discussionmentioning

confidence: 99%

Hybrid Plasmonic Nanomaterials for Hydrogen Generation and Carbon Dioxide Reduction

et al. 2022

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The successful development of artificial photosynthesis requires finding new materials able to efficiently harvest sunlight and catalyze hydrogen generation and carbon dioxide reduction reactions. Plasmonic nanoparticles are promising candidates for these tasks, due to their ability to confine solar energy into molecular regions. Here, we review recent developments in hybrid plasmonic photocatalysis, including the combination of plasmonic nanomaterials with catalytic metals, semiconductors, perovskites, 2D materials, metal–organic frameworks, and electrochemical cells. We perform a quantitative comparison of the demonstrated activity and selectivity of these materials for solar fuel generation in the liquid phase. In this way, we critically assess the state-of-the-art of hybrid plasmonic photocatalysts for solar fuel production, allowing its benchmarking against other existing heterogeneous catalysts. Our analysis allows the identification of the best performing plasmonic systems, useful to design a new generation of plasmonic catalysts.

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“…It is known that the electro-oxidation reaction of HCOOH can proceed via direct pathway and indirect pathway. 44,45 HCOOH → CO 2 + 2H + + 2e − HCOOH → CO ads + H 2 O → CO 2 + 2H + + 2e − The direct pathway is dehydrogenation reaction during which CO 2 is directly formed (eqn (8)). The indirect pathway is dehydration reaction, during this reaction process CO ads can be formed and then it is oxidized to CO 2 at a higher potential (eqn (9)).…”

Section: Resultsmentioning

confidence: 99%

Role of composition and texture on bifunctional catalytic performance of extruded Au–Cu alloys

et al. 2022

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Electromagnetic induction effect induced high-efficiency hot charge generation and transfer in Pd-tipped Au nanorods to boost plasmon-enhanced formic acid dehydrogenation

Cited by 37 publications

References 48 publications

Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Hybrid Plasmonic Nanomaterials for Hydrogen Generation and Carbon Dioxide Reduction

Role of composition and texture on bifunctional catalytic performance of extruded Au–Cu alloys

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Electromagnetic induction effect induced high-efficiency hot charge generation and transfer in Pd-tipped Au nanorods to boost plasmon-enhanced formic acid dehydrogenation

Cited by 37 publications

References 48 publications

Cu2−xSx Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Cu2−xSx Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Hybrid Plasmonic Nanomaterials for Hydrogen Generation and Carbon Dioxide Reduction

Role of composition and texture on bifunctional catalytic performance of extruded Au–Cu alloys

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Product

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Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window

Cu₂₋_xS_x Capped AuCu Nanostars for Efficient Plasmonic Photothermal Tumor Treatment in the Second Near‐Infrared Window