Morphology and properties of a hybrid organic-inorganic system: Al nanoparticles embedded into CuPc thin film

Молодцова, О. В.; Аристова, И. М.; Babenkov, S.; Vilkov, O. V.; Aristov, V. Yu.

doi:10.1063/1.4874161

Cited by 13 publications

(9 citation statements)

References 37 publications

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“…It has been accepted that the activity and selectivity of heterogeneous catalysts are strongly influenced by the metal particle size and catalyst preparation procedure . Nano‐sized metal particles have been extensively investigated for higher alcohol production from syngas because of their large surface‐to‐volume ratios, different physicochemical properties compared to their bulk counterparts, and maximum surface area exposed to the reactants. Accordingly, various methods such as vapour deposition, lithographic, and solid‐state processes have been used for producing nano‐sized particles in catalysis applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

Tavasoli

Kiai

Karimi³

2016

Can J Chem Eng

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A series of nano‐sized alkalized MoS2 catalysts promoted by Ni and Co supported on multi‐walled carbon nanotubes (MWCNTs) were prepared via the reverse microemulsion technique with water to surfactant (W/S) molar ratios (molwater · mol−1surfactant) of 1–12. All prepared catalysts were extensively characterized by ICP, BET, CO chemisorption, XRD, TPR, and TEM techniques. They were assessed in a fixed‐bed micro‐reactor to find their performance in higher alcohol synthesis from syngas. The results were compared with those of the catalyst prepared by the incipient wetness impregnation method with similar elemental composition. The results showed the relationship of catalyst physicochemical properties and performances to preparation method and average metal particle sizes. Calculated average particle sizes for prepared catalysts via microemulsion showed a decreasing trend with a decrease in W/S ratio. It decreased from 17.4 to 5.26 nm for W/S ratios of 12 to 1, respectively. Similarly, the average particle size for prepared catalysts with the impregnation method was 18.78 nm. The nano‐catalyst prepared via microemulsion with W/S of 1 showed the best performance for CO conversion and higher alcohol selectivity of 66.83 and 37.76, respectively. It was concluded that decreased particle sizes increased the active surface area of the Ni and Co promoted alkalized MoS2/MWCNTs catalysts and increased the fraction of metal particles located inside the CNTs, which in turn improved the catalyst performance.

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Section: Introductionmentioning

confidence: 99%

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

Tavasoli

Kiai

Karimi³

2016

Can J Chem Eng

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“…Consecutive deposition of silver on the CuPcF 4 thin film with an increase of the nominal thickness up to 45 Å does not lead to a resolution of the peaks, which again displays the weak interaction of silver with the organics. In the case of deposition of more chemically active metals, for example, aluminum, a splitting of the N 1 s CL peak into two components is observed with a separation of 0.46 eV . The nature of “ R ” in Figure b (top spectrum) peak is currently not completely clear.…”

Section: Resultsmentioning

confidence: 99%

2D/3D Metallic Nano-objects Self-Organized in an Organic Molecular Thin Film

et al. 2020

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We present the fabrication and investigation of the properties of nanocomposite structures consisting of two-dimensional (2D) and three-dimensional (3D) metallic nano-objects self-organized on the surface and inside of organic molecular thin-film copper tetrafluorophthalocyanine (CuPcF4). Metallic atoms, deposited under ultrahigh vacuum (UHV) conditions onto the organic ultrathin film, diffuse along the surface and self-assemble into a system of 2D metallic overlayers. At the same time, the majority of the metal atoms diffuse into the organic matrix and self-organize into 3D nanoparticles (NPs) in a well-defined manner. The evolution of the morphology and electronic properties of such structures as a function of nominal metal content is studied under UHV conditions using transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and photoelectron spectroscopy (PES) techniques. Using HR-TEM, we have observed the periodicity of atomic planes of individual silver NPs. The steady formation of agglomerates from individual single nanocrystallites with intercrystallite boundaries is observed as well. PES reveals generally weak chemical interactions between silver and the organic matrix and n-doping of CuPcF4 at the initial stages of silver deposition, which is associated with charge transfer from the 2D wetting layer on the basis of core-level spectra shift analysis.

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“…It is known that thin Al film can be oxidized by water and oxygen due to its low work function (4.0-4.3 eV). [89][90][91] Therefore, corrosion of the Al electrode is one of the main reasons that cause the extrinsic degradation of PSCs. [92] Ag has a higher work function (4.7 eV) than Al.…”

Section: Degradation Of the Top Metal Electrodementioning

confidence: 99%

Degradation of Polymer Solar Cells: Knowledge Learned from the Polymer:Fullerene Solar Cells

Yan

2021

Energy Tech

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Although power conversion efficiency (PCE) of polymer solar cells (PSCs) has exceeded 18%, the lifetime of PSCs is far away from satisfactory and has become the most critical issue before the commercialization of PSCs. Understanding the degradation mechanism and finding the proper way to suppress the degradation process are of high interests for PSC research. Polymer:fullerene solar cells (PFSCs) have a long research history and the working principle is well‐understood, so they are good models for the degradation mechanism study. This mini‐review summarizes the latest research progress of the PFSCs’ degradation studies. Based on the results achieved, one can identify the extrinsic and intrinsic stress factors that cause different degradation processes. Degradation pathways of the PFSCs at different positions in the cells will be discussed in detail, including the electrode, the buffer layer, and the photoactive layer. Special emphasis will be put on various degradation processes of the photoactive layers. In the meantime, the methods to suppress the degradation processes will be presented accordingly. This mini‐review gives a comprehensive insight into the degradation mechanism and stability‐improvement strategies of PFSCs, which has important guiding significance for the stability‐improvement research of PSCs.

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Morphology and properties of a hybrid organic-inorganic system: Al nanoparticles embedded into CuPc thin film

Cited by 13 publications

References 37 publications

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

2D/3D Metallic Nano-objects Self-Organized in an Organic Molecular Thin Film

Degradation of Polymer Solar Cells: Knowledge Learned from the Polymer:Fullerene Solar Cells

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Morphology and properties of a hybrid organic-inorganic system: Al nanoparticles embedded into CuPc thin film

Cited by 13 publications

References 37 publications

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS2 catalysts promoted by Ni and Co in higher alcohols synthesis

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS2 catalysts promoted by Ni and Co in higher alcohols synthesis

2D/3D Metallic Nano-objects Self-Organized in an Organic Molecular Thin Film

Degradation of Polymer Solar Cells: Knowledge Learned from the Polymer:Fullerene Solar Cells

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Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis