Crystal structure and Raman scattering characterization of Cu2Fe1-xCoxSnS4 chalcogenide compounds

López-Vergara, F.; Galdámez, Antonio; Manrı́quez, V.; González, Guillermo

doi:10.1016/j.solidstatesciences.2015.09.010

Cited by 31 publications

(4 citation statements)

References 18 publications

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“…The catalyst was further characterized using Raman spectral analysis, as shown in Figure D. The distinct peak observed at 319 cm –1 is indicative of the A g mode of SnS nanoparticles. − …”

Section: Resultsmentioning

confidence: 99%

Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Islam,

Hossain,

Aoki

et al. 2024

ACS Appl. Energy Mater.

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Development of a novel SnS| PTFE| Pt electrode as an efficient catalyst for electrochemical CO2 reduction to formate in an aqueous alkaline imidazole medium is reported in this paper. The electrode was prepared through the incorporation of polytetrafluoroethylene (PTFE) with SnS and modification of the Pt surface by SnS/PTFE. The electrode facilitated a first-order CO2 reduction at −1.1 V vs Ag/AgCl (saturated KCl) via a diffusion-controlled pathway with a cathodic electron transfer coefficient (α) of 0.22 and two-electron transfer kinetics in two steps, where the first electron transfer step determined the reaction rate. The SnS| PTFE| Pt electrode surface exhibited well-defined cyclic voltammograms (CVs) for CO2 reduction in comparison to GCE, Au, Pd, and graphite-modified electrodes utilizing the same catalyst, indicating superior catalytic efficiency and its conduciveness to kinetic investigations. Such performance indicates that the SnS| PTFE| Pt electrode would be a promising alternative for CO2 reduction in the context of renewable energy generation.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Islam,

Hossain,

Aoki

et al. 2024

ACS Appl. Energy Mater.

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“…There is also a variation in the frequency of the main A1 vibration mode at 330 cm −1 . The broadening of the main peaks found in the solid solution with the increasing content of Fe is attributed to disorder effects due to chemical substitutions in M crystallographic positions [56]. The spectrum of CMTS (Figure 12F) shows the splitting of the main peak into 323 and 334 cm −1 .…”

Section: Synthesis Of Cu 2 (Mn 1−x Fe X )Sns 4 Solid Solution Seriesmentioning

confidence: 95%

Synthesis and Characterization of Cu2FeSnS4–Cu2MnSnS4 Solid Solution Microspheres

2020

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In this study, we used a hydrothermal method to synthesize microspheres of Cu2(Mn1−xFex)SnS4 solid solution (X = 1, 0.8, 0.6, 0.4, 0.2, 0). The process was optimized to improve the crystallinity, morphology, and purity of the obtained materials. All samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The following conditions were optimized: A mixture of water and ethylene glycol at the ratio of 1:7 as the reaction medium, polyvinylpyrrolidone (PVP) as the surface ligand, and reaction temperature of 195 °C for 7 days. The product of synthesis precipitated in the form of aggregates of nanocrystals, which form homogeneous, often concentric microspheres with a diameter of 1–1.5 μm. The chemical composition of the product can be well controlled by the chemical composition of the reactants. The compound Cu2(Mn1−xFex)SnS4 forms a continuous series of solid solutions.

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“…The use of Raman scattering to establish changes in symmetry on a single crystal, in particular for the soft or over-damped vibration modes of perovskites for which the information on the true mean symmetry is given by the measurement of Raman intensities (not authorized by group theory). [62][63][64][65][66] The study of apatite showed the presence of a cyanobacterial component [63] and the presence of the biological Raman spectral signatures associated with the host matrix will provide a further scenario for the remote search for life missions now being planned for Mars, especially Mars2020 and ExoMars 2022, both of which will use Raman spectral interrogation of the Martian surface or subsurface for extant or extinct preserved material. Apatite is a mineral identified with life processes and occurs in pathogenic formations such as kidney stones, cardiac valves, and salivary stones.…”

Section: Systematic Absencementioning

confidence: 99%

The use of Raman and infrared spectroscopy in determining the space symmetry group among the groups with the same rules of systematic absence in the diffraction patterns: Some basic principles and applications

Мороз

Edwards

2021

J Raman Spectroscopy

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Raman spectroscopy and infrared (IR) spectroscopy can be used in the determination of the structural organization of crystals from the short-range order (IR) to the mid-and far-range orders (Raman). Among the 230 possible crystal space groups, only 61 can unambiguously be determined by X-ray diffraction. In other cases, from two to five space groups are characterized by unified diffraction extinction rules. The symmetry of the active irreducible representations of vibrations in IR, Raman, and hyper-Raman (HR) spectra for all crystallographic systems are systematized, and cases are indicated where the ambiguity in the assignment of crystal structures to the space groups with unified diffraction extinction rules can be overcome. The refinement of a space group of a mineral by analyzing the selection rules from IR and Raman spectra is discussed, and some examples are considered, including nontronite, kladnoite, and ugrandite.

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Crystal structure and Raman scattering characterization of Cu2Fe1-xCoxSnS4 chalcogenide compounds

Cited by 31 publications

References 18 publications

Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Synthesis and Characterization of Cu2FeSnS4–Cu2MnSnS4 Solid Solution Microspheres

The use of Raman and infrared spectroscopy in determining the space symmetry group among the groups with the same rules of systematic absence in the diffraction patterns: Some basic principles and applications

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Crystal structure and Raman scattering characterization of Cu2Fe1-xCoxSnS4 chalcogenide compounds

Cited by 31 publications

References 18 publications

Electrochemical Reduction of CO2 by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Electrochemical Reduction of CO2 by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Synthesis and Characterization of Cu2FeSnS4–Cu2MnSnS4 Solid Solution Microspheres

The use of Raman and infrared spectroscopy in determining the space symmetry group among the groups with the same rules of systematic absence in the diffraction patterns: Some basic principles and applications

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Product

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Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics

Electrochemical Reduction of CO₂ by the SnS| PTFE| Pt Surface in an Aqueous Imidazole Medium: Catalysis and Kinetics