Catalytic reduction of U(VI) in H2SO4 solutions with hydrazine and formic acid in the presence of bimetallic platinum-ruthenium catalysts
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The structure of bimetallic platinum-ruthenium catalysts was studied by X-ray phase analysis and X-ray absorption spectroscopy. The effects of strong electronic interaction of Pt and Ru atoms in formation of the binary catalyst were revealed. The kinetics of catalytic reduction of U(VI) with hydrazine and formic acid in sulfuric acid solutions on 5% (Pt-Ru)/SiO2 was studied. The mechanisms of these reactions with platinum and bimetallic platinum-ruthenium catalysts are similar. A catalytic synergistic effect is observed in heterogeneouscatalytic reactions of U(VI) reduction with hydrazine and formic acid in H2SO4 solutions.
Keywordsuranium(VI) reduction hydrazine formic acid platinum-ruthenium catalysts
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