Synthesis of Filamentary Carbon Material on a Self-Organizing Ni–Pt Catalyst in the Course of 1,2-Dichloroethane Decomposition
| Autor: | Yu. I. Bauman, Pavel E. Plyusnin, Yu. V. Shubin, Yu. V. Rudneva, A. A. Vedyagin, Ilya V. Mishakov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Coprecipitation Alloy Sintering chemistry.chemical_element 02 engineering and technology General Chemistry Atmospheric temperature range engineering.material 1 2-Dichloroethane 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Computer Science Applications Nickel chemistry.chemical_compound Chemical engineering Modeling and Simulation engineering 0210 nano-technology Solid solution |
| Zdroj: | Kinetics and Catalysis. 59:363-371 |
| ISSN: | 1608-3210 0023-1584 |
| DOI: | 10.1134/s0023158418030023 |
| Popis: | A series of model microdisperse Ni1–xPt x alloys (x =0–0.05) was synthesized by a coprecipitation method with the subsequent sintering of the precipitate in an atmosphere of H2 at 800°C. Their chemical and phase compositions were determined (by AAS and XRD analysis, respectively), and it was found that the synthesis method proposed afforded Ni–Pt solid solutions based on the face-centered nickel lattice. The kinetic features of the carbon erosion of Ni1–xPt x alloys in their contact with 1,2-dichloroethane vapor in a temperature range of 550–700°C were studied. It was found that the presence of Pt in the alloy increased the rate of accumulation of carbon product by a factor of ~1.5 regardless of the concentration of Pt. The catalyst did not undergo deactivation for 5 h of reaction to ensure a high yield of carbon material (103 g/gCat). With the use of electron microscopy (SEM and TEM techniques), it was found that the carbon product consisted of carbon fibers with a segmented structure. An increase in the concentration of Pt in the alloy to 4.3 wt % sharply changed the disintegration of the alloy to cause the formation of carbon product with a bimodal fiber diameter distribution (dav = 0.4 and 1.2 μm). |
| Databáze: | OpenAIRE |
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