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Catalytic oxidation of sulfide ions over nickel hydroxides |
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| Authors: | A Andreev P Khristov and A Losev |
| Affiliation: | aInstitute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria bInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria |
| Abstract: | The catalytic sulfide ion oxidation by oxygen to elemental sulfur over β-Ni(OH)2 and LiNiO2 has been studied. As a result of experimental investigation performed, a reaction mechanism is suggested which involves heterogeneous and homogeneous processes. Dioxygen activation in the heterogeneous process proceeds via a redox Ni2+ ? Ni3+ transition and participation of OH? groups. The active HO?2 species thus formed carries on the reaction in homogeneous phase. Nickel hydroxides are promising catalysts for practical application. |
| Keywords: | Oxidation Nickel hydroxide S2? oxidation |
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