Abstract: The carbon nanofibers doped with nitrogen (N-doped CNF) attract much attention as the prospective material for electrocatalysis, single-site catalysis, and material science. As recently shown, N-CNF can be obtained using Ni-M self-organizing catalysts (SOC) as a product of conjugated catalytic processing of chlorinated hydrocarbons over Ni-M precursors. The mechanochemical alloying (MA) is an effective, environmentally-friendly method for the preparation Ni-M alloys in one stage. A series of bimetallic Ni-10%M (M = Co, Cr, Mo) alloys was prepared by the MA technique using the planetary mill “Activator-2SL”. The parameters of MA were adjusted to provide the formation of a single-phase Ni-M solid solution. The crystallographic characteristics of Ni-M alloys were determined by XRD. The synthesized alloys were utilized as precursors for SOC during the H2-assisted decomposition of C2H4 (or C2H4Cl2) in combination with N-containing co-substrates (CH3CN etc.) at 550-700°С. The in situ kinetic studies of the carbon deposition were performed in a flow gravimetric reactor. Under the specified conditions, all the Ni-M alloys underwent fast disintegration via the metal dusting process. The resulting particles play the role of catalytically active sites for the N-doped CNF growth. The chemical composition, structural characteristics, and textural properties of the obtained N-CNF materials were explored by XRD, XPS, Raman spectroscopy, and BET. The effects of metal M, parameters of MA procedure as well as the nature of the used carbon precursors on properties of the produced N-CNF materials are to be discussed. This study was supported by the Russian Foundation for Basic Research (project 18-29-19053_mk).

Cite: Mishakov I.V. , Bauman Y.I. , Shubin Y.V. , Belyaev E.Y. , Kibis L.S. , Kadtsyna A.S. , Serkova A.N. , Vedyagin A.A.
Synthesis of N-doped Carbon Nanofibers over Ni-M Alloys Prepared via Mechanochemical Alloying Approach
5th International Conference on Catalysis and Chemical Engineering 22-26 Feb 2021