Electrochemical oxidation of niobium and tantalum carbides in aqueous solutions

D. J. Walczyk, D. F. Mason, B. G. Palazzo, Z. A. Norris, N. McRae, A. T. Tran, J. D. Hettinger, L. Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Transition metal carbides have unique properties such as high hardness, high melting point, high thermal conductivity, and high chemical stability. At a temperature of 350 °C or higher, some metal carbides can react with chlorine gas to form volatile metal chlorides. At room temperature, metal carbides are very stable in several strong acid solutions. However, metal carbides can be oxidized electrochemically. Then, metal oxides can be produced and dissolved in the solutions. In this report, we investigate the electrochemical properties of a series of metal carbides including NbC, Nb2C, TaC, and Ta2C in aqueous solutions with the presence of HCl and HF. Cyclic voltammetry and elemental analysis demonstrated that all of these metal carbides can be oxidized electrochemically at a "mild" electrode potential and produce soluble metal ions in the solutions.

Original languageEnglish (US)
Title of host publicationSelected Proceedings from the 231st ECS Meeting New Orleans, LA - Spring 2017
PublisherElectrochemical Society Inc.
Number of pages8
ISBN (Electronic)9781607688174
ISBN (Print)9781623324605
StatePublished - 2017
Event231st ECS Meeting - New Orleans, United States
Duration: May 28 2017Jun 1 2017

Publication series

NameECS Transactions
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


Other231st ECS Meeting
Country/TerritoryUnited States
CityNew Orleans

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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