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- Title
Synthesis of Filamentary Carbon Material on a Self-Organizing Ni-Pt Catalyst in the Course of 1,2-Dichloroethane Decomposition.
- Authors
Bauman, Yu. I.; Rudneva, Yu. V.; Mishakov, I. V.; Plyusnin, P. E.; Shubin, Yu. V.; Vedyagin, A. A.
- Abstract
A series of model microdisperse Ni1-xPtx 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-xPtx 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).
- Subjects
NICKEL catalysts; ETHYLENE dichloride; CHEMICAL decomposition; CHEMICAL synthesis; COPRECIPITATION (Chemistry); SOLID solutions
- Publication
Kinetics & Catalysis, 2018, Vol 59, Issue 3, p363
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158418030023