Abstract: In production of chlorine by electrolysis of NaCl, chlorate is formed as by-product and must be removed. The back conversion of ClO3− to Cl− via catalytic reduction with H2 on Ir catalyst in NaCl brine has been studied. The catalysts contained 0.5–5 wt.% of Ir and were prepared via impregnation of mesoporous carbon support (SibunitTM) with solutions of IrCl3·xHCl·yH2O or H2IrCl6 and reduction in flowing H2 at 400 or 500 ◦C. The Ir/C samples have been characterized with CO adsorption, XPS and HRTEM. The rate of ClO3− reduction in concentrated solutions of NaCl was found dependent on pH (in the range 2–6), content of Ir in the catalyst, dispersion and distribution of Ir on the support. The best properties have been shown by 5%Ir/C catalyst which was prepared with H2IrCl6 as the metal precursor and contained small Ir particles (∼1.5 nm in diameter) located inside the cavities of carbon globules. Stable catalytic performance in multiple successive runs has been achieved.

Cite: Kuznetsova L.I. , Kuznetsova N.I. , Koscheev S.V. , Zaikovskii V.I. , Lisitsyn A.S. , Kaprielova K.M. , Kirillova N.V. , Twardowski Z.
Carbon-Supported Iridium Catalyst for Reduction of Chlorate Ions with Hydrogen in Concentrated Solutions of Sodium Chloride
Applied Catalysis A: General. 2012. V.427-428. P.8-15. DOI: 10.1016/j.apcata.2012.03.024 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Jan 17, 2012
Accepted:	Mar 15, 2012
Published online:	Mar 28, 2012
Published print:	Jun 1, 2012

Identifiers:

Web of science:	WOS:000304692000002
Scopus:	2-s2.0-84860522195
Elibrary:	17984150
Chemical Abstracts:	2012:552235
Chemical Abstracts (print):	157:25016
OpenAlex:	W2323202666

Citing:

DB	Citing
Web of science	27
Scopus	27
Elibrary	27
OpenAlex	28

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