TY - JOUR

T1 - Catalytic Properties of Bulk (1–x)Ni–xW Alloys in the Decomposition of 1,2-Dichloroethane with the Production of Carbon Nanomaterials

AU - Mishakov, I. V.

AU - Bauman, Yu I.

AU - Potylitsyna, A. R.

AU - Shubin, Yu V.

AU - Plyusnin, P. E.

AU - Stoyanovskii, V. O.

AU - Vedyagin, A. A.

N1 - Funding Information: This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of a state contract of the Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences (project no. AAAA-A21-121011390054-1). The synthesis and X-ray diffraction analysis of the porous nanoalloy samples were supported by the Russian Science Foundation (project no. 21-13-00414). Funding Information: We are grateful to A.N. Serkov and M.N. Volochaev for their assistance in examining the samples by electron microscopy. The physicochemical properties of the samples were analyzed using the equipment of the Center for Collective Use ?National Center for Catalyst Research.? The TEM analysis of the samples was carried out using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch, Russian Academy of Sciences. Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/2

Y1 - 2022/2

N2 - This work was devoted to a search for effective catalysts for the processing of chlorine-substituted hydrocarbons to obtain carbon nanomaterials. A series of porous (1–x)Ni–xW nanoalloys with tungsten concentrations from 0.5 to 10 wt % was synthesized by a coprecipitation method. All of the samples were single-phase solid solutions based on a face-centered cubic (fcc) lattice of nickel and had a spongy structure. The kinetics of carbon erosion of bulk (1–x)Ni–xW alloys in the course of interaction with a reaction atmosphere containing 1,2-dichloroethane vapor at 600°C was studied. This process was accompanied by rapid disintegration of the alloys with the formation of active particles for the growth of carbon nanofibers (CNFs). The addition of tungsten led to an increase in the activity of nickel in the synthesis of CNFs by 10–70%. The highest yield of CNFs for 2 h of reaction (29.8 g/gNi) was observed with a Ni–W alloy (4 wt %). The structural and morphological features of the resulting carbon product were investigated. Electron-microscopic data indicated the formation of carbon filaments with a pronounced segmented structure. Raman spectroscopy data revealed that the addition of tungsten decreased the fraction of amorphous carbon in the product. According to the data of low-temperature nitrogen adsorption, the specific surface area of the carbon nanomaterial was 300–400 m2/g.

AB - This work was devoted to a search for effective catalysts for the processing of chlorine-substituted hydrocarbons to obtain carbon nanomaterials. A series of porous (1–x)Ni–xW nanoalloys with tungsten concentrations from 0.5 to 10 wt % was synthesized by a coprecipitation method. All of the samples were single-phase solid solutions based on a face-centered cubic (fcc) lattice of nickel and had a spongy structure. The kinetics of carbon erosion of bulk (1–x)Ni–xW alloys in the course of interaction with a reaction atmosphere containing 1,2-dichloroethane vapor at 600°C was studied. This process was accompanied by rapid disintegration of the alloys with the formation of active particles for the growth of carbon nanofibers (CNFs). The addition of tungsten led to an increase in the activity of nickel in the synthesis of CNFs by 10–70%. The highest yield of CNFs for 2 h of reaction (29.8 g/gNi) was observed with a Ni–W alloy (4 wt %). The structural and morphological features of the resulting carbon product were investigated. Electron-microscopic data indicated the formation of carbon filaments with a pronounced segmented structure. Raman spectroscopy data revealed that the addition of tungsten decreased the fraction of amorphous carbon in the product. According to the data of low-temperature nitrogen adsorption, the specific surface area of the carbon nanomaterial was 300–400 m2/g.

KW - 1,2-dichloroethane

KW - carbide cycle mechanism

KW - carbon nanofibers

KW - nickel

KW - porous nanoalloys

KW - segmented structure

KW - tungsten

UR - http://www.scopus.com/inward/record.url?scp=85123838005&partnerID=8YFLogxK

UR - https://elibrary.ru/item.asp?id=47696553

UR - https://www.mendeley.com/catalogue/f4cafe17-b910-34b3-b2db-db6642b651b3/

U2 - 10.1134/S0023158422010037

DO - 10.1134/S0023158422010037

M3 - Article

AN - SCOPUS:85123838005

VL - 63

SP - 75

EP - 86

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 1

ER -