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X-ray photoelectron spectroscopy

Tìm thấy 20+ kết quả cho từ khóa "X-ray photoelectron spectroscopy"

The atomic and electronic structure of Hf0.5Zr0.5O2 and Hf0.5Zr0.5O2:La films

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Using X-ray photoelectron spectroscopy, it was found that the oxides under study have an almost identical electronic structure and a bandgap of about 5.4 eV. The Hf 0.5 Zr 0.5 O 2 :La film was shown to consist of the mixture of Hf 0.5 Zr 0.5 O 2 and La 2 O 3 phases. The bombardment with argon ions of the studied fi lms leads to oxygen vacancy generation in the near-surface layer.

Preparation of different thin film catalysts by direct current magnetron sputtering for hydrogen generation

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The surface and cross-sectional morphology were examined by Quanta FEG 250 scanning electron microscope (SEM), and elemental composition of the coatings was determined by energy-dispersive X-ray spectrometry (EDS).The surface electronic states of the coated Ni, Co, Pd, and Pt metals were analysed by X-ray photoelectron spectroscopy (XPS) using the Specs-Flex X-ray photoelectron spectrometer.. Measurement of hydrogen generation rate.

A novel fabrication of organic-inorganic hybridized GrapheneLa2CrFeW6 nanocomposite and its improved photovoltaic performance in DSSCs

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To analyze the structural properties and composition of the samples, we used X-ray photoelectron spectroscopy (XPS, K- Fig. XPS spectra of as-synthesized G-LCFW@CdSe. The photocurrent- photovoltage (J e V) of the DSSCs was calibrated under 100 mW cm 2 with an AM 1.5 fi lter through an infrared blocking. The XRD spectra of the G-LCFW@organics are represented in Fig.

Metal nanoparticles/carbon nanotube modified electrodes for voltammetric determination of boron

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The characteristics of modified electrodes were investigated using cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron micro- scope, energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy, and X-ray photoelectron spectroscopy.

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

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The X-ray photoelectron spectroscopy (see Figure4a- b) was constructed to study the elemental bonding states of as-grown MoS 2 nanoparticles. Besides, the two small peaks (orange fitted curves) overbed at 231.8, and 235.9 eV are as- cribed to the Mo 6+ states, indicating the formation of a small amount of molybdenum oxide due to par- tial oxidation of MHC throughout the deposition pro- cess 22,23 .

Facial Synthesis and Characterization of Polypyrrole/zinc oxide (ZnO) Nanorode and Flower-like Shape Composites

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Abdelijalil, A study of the degradation and stability of polypyrrole by inverse gas chromatography, X-ray photoelectron spectroscopy, and conductivity measurements, Synthetic Metals . Sakkopoulas, Effect of ZnO concentration on the structure and charge transport in conductive polypyrrole /ZnO x% w/w composites with x and 40, Romanian Journal of Physics

Tin-sulfur based catalysts for acetylene hydrochlorination

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In order to investigate the chemical state of Sn species and the interaction between Sn and S in catalysts, we adopted X-ray photoelectron spectroscopy (XPS, Escalab250i, Thermo Fisher Scientific, Waltham, MA, USA) techniques.. Hydrochlorination activity of catalysts (4.0 mL) was performed in fixed bed reactor (i.d =10 mm).

Hydrophobic and hydrophilic drug loading capacity of micro diatom frustule from diatomite

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Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) confirmed again the porous silica structure of micro diatom structure as well as validated a necessity of raw diatomite purification before using. UV- vis was used to measure drug loading content of untreated and treated surface of micro diatom frustule with maximum loading for hydrophobic and hydrophilic drugs after 24 hours were at and 5.70.

Size-controllable carbon spheres doped Ni (II) for enhancing the catalytic oxidation of methanol

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The morphology and composition of the catalysts were studied with scanning electron microscope, transmission electron microscope, and X-ray diffraction. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the surface of the prepared carbon spheres was rich in hydroxyl groups, which was beneficial to remove CO intermediates, and therefore, improving the catalytic efficiency and the antipoisoning ability of the catalysts.

Nghiên cứu hoạt tính của xúc tác AlVOx và BiMoSn0.06O4.62 cho phản ứng oxy hóa chọn lọc propylen và propan thành acrolein.

000000272891.pdf

dlib.hust.edu.vn

XRF X-ray photoelectron spectroscopy GC Gas Chromatography (Sc ký khí) TCD Thermo Conductivity Detector (Detector dn nhit) FID Flame Ionization Detector (Detector ion hóa ngn la) COx Oxides of Carbon (các oxit Cacbon) C3H8/O min C3H8/20 ml/min O2 C3H8/O ml/min C3H8/30 ml/min O2 C3H8/O ml/min C3H8/36 ml/min O2 C3H6/O ml/min C3H6/30 ml/min O2 C3H6/O ml/min C3H6/50 ml/min O x O4.62. n phc t ch bin propylen (ph ng)[45. trong quá trình phân tích ct HC. H H8/O2=1/1 68.

N doping of TiO2 nanocrystal for efficient photodegradation of organic pollutants under ultraviolet and visible light irradiation

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The N-doped TiO 2 photocatalysts have been characterized in detail by means of powder X-ray diffraction, Raman spectroscopy, infrared spectroscopy, UV-vis spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope. The photocatalytic activities of N-doped TiO 2 to different organic pollutants are significantly different.

Feature of catalysis on bimetallic alloys Zr with V, Mo, and Fe in the reaction of methanol oxidation

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The analysis of the alloys surface and the state of the components of the alloys before and after the О 2 - and Н 2 -treatment were carried out by X-ray photoelectron spectroscopy (XPS) method on a VIEE-15 and ADES-400 spectrometer. Figure 7 shows the X-ray spectra of the ZrMo 2 intermetallic compound depending on the processing conditions..

Influence of manganese content on the supercapacitive performance of PbO2–MnO2 electrodes

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The morphology, composition, and struc- ture of the PbO 2 –MnO 2 electrodes were analyzed by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD).

Nghiên cứu tổng hợp, biến tính vật liệu mao quản trung bình SBA-15 làm xúc tác cho quá trình cracking phân đoạn dầu nặng

277069.pdf

dlib.hust.edu.vn

TGA Thermogravimetric Analysis viii TMOS Tetramethoxysilane TPD Temperature Programmed Desorption UV-Vis Tử ngoại – Khả kiến WHSV Weight Hourly Space Velocity XPS X-ray Photoelectron Spectroscopy XRD X-ray Diffraction ZSM-5 Zeolit ZSM-5 có mã cấu trúc quốc tế là MFI ix DANH MỤC BẢNG BIỂU Bảng 1.1.

Hydrolysis of ammonia borane and hydrazine borane by poly(N -vinyl-2-pyrrolidone)-stabilized CoPd nanoparticles for chemical hydrogen storage

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Very stable colloidal CoPd @ PVP nanoparticles have been characterized by UV-Vis spectroscopy, transmission electron microscopy-energy dispersive analysis (TEM-EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). CoPd @ PVP nanoparticles, with the inclusion of cobalt in the structure, will be low-cost catalysts for hydrogen release from hydrolysis of AB and HB compared to the use of all-noble metal catalysts.. Preparation and characterization of CoPd @ PVP nanoparticles.

First-principles Calculations on Electronic Properties of LaNiO3 in Solid Oxide Fuel Cell Cathodes

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Jonauskas, “Electronic structure of LaNiO 3−x thin films studied by X-ray photoelectron spectroscopy and density functional theory”, Phys. Fu, “Electronic structure and optical properties of LaNiO 3 : First-principles calculations”, Solid State Commun

Theoretical prediction of the structural and electronic properties of a single layer graphene-like two-dimensional janus Janus GaInSTe

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The asymmetric out-of-plane geometric structure of MoSSe has been observed by means of scanning transmission electron microscopy and energy-dependent X-ray photoelectron spectroscopy [11]. It is well-known that the electronic and transport properties of the 2D materials are very sensitive to structural perfection and geometric symmetry plays a key role in determining their physical properties..

Hydrotalcite framework stabilized ruthenium nanoparticles (Ru/HTaL): Efficient heterogeneous catalyst for the methanolysis of ammonia-borane

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The characterization of Ru/HTaL has been done by using various spectroscopic and visualization techniques including inductively coupled plasma optical emission spec- troscopy (ICP-OES), powder X-ray diffraction (P-XRD), Fourier transform infrared spectroscopy (FTIR), 11 B NMR spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), bright field transmission electron microscopy (BFTEM), and high resolution transmission electron microscopy (HRTEM)..

Impact of graphitic carbon nitrides synthesized from different precursors on Schottky junction characteristics

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Therefore, the Schottky junctions, g-CN(X)-AgPd (X: M, U, T, G), were prepared by the reduction of the corresponding aqueous solutions of metal salts on g-CNs with NaBH 4 . FEI- TALOS F200S TEM 200 kV) was used for analyzing the morphology and particle size of the samples. X-ray photoelectron spectroscopy (XPS, Thermo K-Alpha) was used for determining the chemical states and surface compositions of the photocatalysts.

Selective CO methanation over NiO–Al2O3–ZrO2 and Co3O4–Al2O3–ZrO2 catalysts

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Different techniques were used in order to determine the physical properties of the catalysts, namely X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption, thermogravimetric analysis (TGA), temperature programmed reduction (TPR–H 2. BET, multipoint surface areas, pore volumes, and pore diameters of the catalysts were evaluated by a Quantochrome Autosorp 1C/MS device. The oxidation states of the components in the catalyst structure were determined by XPS.