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Electrocatalysis of the hydrogen evolution reaction by thermally formed sulfides on steels

Kumar, Prem T and Sathyanarayana, S (1990) Electrocatalysis of the hydrogen evolution reaction by thermally formed sulfides on steels. In: Bulletin of Electrochemistry, 6 (2). pp. 268-272.

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Abstract

The electrocatalytic activity was studied of sulfides, formed by thermal sulfidization of various com. available steels, for the cathodic evolution of H from sodium chloride. The effects of certain surface active anions on the H evolution reaction on these sulfidized steels were also studied. Sulfidization of C steels and Si steels increases their electrocatalytic activity with respect to cathodic H evolution and thereby reduces the over potential in sodium chloride solns. (typically about 100-150 mV at 0.5 A cm-2). The anomalously high Tafel slopes obsd. for H2 evolution reaction on steels during brine electrolysis is explained as due most probably to the presence of a hydride film on the steel surface at high cathodic potentials. A comparison of the H overpotentials and corrosion currents reveals that C steels - both in their plain and sulfidized forms - are better cathodes for brine electrolysis.

Item Type: Journal Article
Additional Information: The copyright belongs to Central Electrochemical Research Institute, Karaikudi, India.
Keywords: Electrocatalysis;hydrogen evolution;sulfides
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Srinivasa Naika
Date Deposited: 30 Jan 2008
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ac.in/id/eprint/12588

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