2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 3. Gaune-Escard Intl. Symp. / Molten Salt and Ionic Liquid
| Editors: | Kongoli F, Fehrmann R, Gadzuric S, Gong W, Seddon KR, Malyshev V, Iwata S |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 151 pages |
| ISBN: | 978-1-987820-65-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electrochemical Utilization of Carbon Dioxide in Molten Salts
Sergei Kuleshov1; Inessa Novoselova1;1INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY, Kiev, Ukraine;
Type of Paper: Regular
Id Paper: 101
Topic: 13
Abstract:
Despite the severe international policies for carbon dioxide (CO2) emission, it continues to accumulate in the atmosphere at a rapid space. Among the electrochemical processes, the electrochemical reduction of carbon dioxide is considered as one of the most promising ways for converting the vast quantities of negative value CO2 to high added value fuels and chemicals.
The CO2 gas can be utilized as a precursor of carbon for the high-temperature electrochemical synthesis (HTES) of powders of carbon nanomaterials (CNM) of different structures (carbon tubes, fibers, amorphous carbon) and refractory metals carbides (Mo2C, WC) in molten salts.
The purpose of the present work is the development of physical-chemical basis of HTES of pointed compounds.
The electrochemical reduction of tungsten and carbon from their different oxygen-containing compounds, separately and simultaneously, was studied at Pt, GC, W cathodes in the chloride-oxide melts by the method of cyclic voltammetry. Optimum conditions for obtaining of highly dispersed powders of CNM and refractory metals carbides have been found. The properties of produced materials were analyzed by XRD, SEM, Raman- and ESR –spectroscopy, BET and BJH methods.
Obtained materials may be used as a potential electrocatalyst for the PEM fuel cell application, methanol electrooxidation and hydrogen evolution reaction. The estimation of electrocatalytic activity of tungsten carbides with the surface area of 25 m2•g-1 was carried out for the reaction of I2 evolution in acid electrolytes.
Present investigations have shown that it is possible to produce by the electrolytic method the composition mixtures of nanosized powders of refractory metals carbides (Mo2C, WC and W2C) and CNM of different composition with unique properties for electrocatalysis.