TY - JOUR

T1 - Synthesis of Filamentary Carbon Material on a Self-Organizing Ni–Pt Catalyst in the Course of 1,2-Dichloroethane Decomposition

AU - Bauman, Yu I.

AU - Rudneva, Yu V.

AU - Mishakov, I. V.

AU - Plyusnin, P. E.

AU - Shubin, Yu V.

AU - Vedyagin, A. A.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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).

AB - 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).

KW - 1,2-dichloroethane decomposition

KW - carbon erosion

KW - carbon nanomaterials

KW - nickel–platinum alloys

KW - segmented filaments

KW - self-organizing catalysts

KW - SYSTEM

KW - CHEMICAL-VAPOR-DEPOSITION

KW - NANOFIBERS

KW - CO

KW - PD

KW - CHLORINATED HYDROCARBONS

KW - ALLOYS

KW - GROWTH

KW - NANOTUBES

KW - nickel-platinum alloys

KW - PRECURSORS

UR - http://www.scopus.com/inward/record.url?scp=85048295982&partnerID=8YFLogxK

U2 - 10.1134/S0023158418030023

DO - 10.1134/S0023158418030023

M3 - Article

AN - SCOPUS:85048295982

VL - 59

SP - 363

EP - 371

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 3

ER -