Jump to main content
Jump to site search

Issue 32, 2019
Previous Article Next Article

Carbonization of transition metals in molten salts

Author affiliations

Abstract

The carbonization of transition metals in molten salts was performed to study the effect of electrochemical polarization and molten salt medium on the carbonization process. The carbonization of niobium (Nb) has been systemically investigated in Ar atmosphere and molten salts. The effect of particle size and structure of the starting materials, molten salt medium, and electric field on the formation of NbC was studied to reveal the dynamic barriers in the carbonization process. A native oxide layer and/or niobate derivatives generated on the Nb particles are the main barriers for the mass transfer of carbon and Nb towards each other. The results showed that molten salts can accelerate the formation of NbC by enhancing the diffusion of carbon, and the kinetic barrier can be effectively eliminated by supplying negative polarization to the cathode in molten salts to remove the oxide barriers, thereby enhancing carbonization. Besides Nb, tungsten (W), molybdenum (Mo), titanium (Ti), and tantalum (Ta) can also be carbonized in molten salts with the assistance of an applied electric field.

Graphical abstract: Carbonization of transition metals in molten salts

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 May 2019, accepted on 19 Jul 2019 and first published on 20 Jul 2019


Article type: Paper
DOI: 10.1039/C9CP02585E
Phys. Chem. Chem. Phys., 2019,21, 17801-17810

  •   Request permissions

    Carbonization of transition metals in molten salts

    Q. Song, Z. Zhang, H. Xie, H. Yin and Z. Ning, Phys. Chem. Chem. Phys., 2019, 21, 17801
    DOI: 10.1039/C9CP02585E

Search articles by author

Spotlight

Advertisements