Preparation of ruthenium dioxide by reduction of Ru(VIII, VII, VI) with sodium tetrahydroborate in aqueous solution

Journal Article · Sat Sep 10 00:00:00 EDT 1983 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:7119490

Khain, V S; Volkov, A A

The purpose of the present work was to develop a simple and convenient method for preparation of ruthenium dioxide of constant composition by reduction of Ru(VIII, VII, VI) with sodium tetrahydroborate in the cold in aqueous solutions at pH = 1-12. Under these conditions reduction of ruthenium compounds is virtually instantaneous and the dioxide is obtained in a form convenient for filtration and fairly pure. Hydrolysis of BH/sub 4//sup -/ is suppressed considerably in comparison with solutions of pH less than or equal to 1. The degree of hydrolysis in comparison with the main reaction decreases with increase of pH; this leads to increase of the RuO/sub 2/ yield and to decreased consumption of the reducing agent. In view of absence of literature data, the stoichiometry of the reaction of NaBH/sub 4/ with RuO/sub 4/ by methods of gas-volumetric and chemical analysis was investigated. The final product of Ru(VIII) reduction was also identified with the aid of IR spectroscopy and x-ray phase analysis.

• Research Organization: Ukhta Industrial Inst., USSR
• OSTI ID: 7119490
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 56:3; ISSN JAPUA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
BORATES
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
INFRARED SPECTRA
OXIDES
OXYGEN COMPOUNDS
PH VALUE
REDUCTION
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
SODIUM COMPOUNDS
SPECTRA
STOICHIOMETRY
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTRA