Direct electrochemical oxidation of slurries as an alternative soft route for the synthesis of mixed metal oxides

摘要

The direct electrochemical oxidation of a slurry of Ag_2Cu_2O_3 in alkaline media yields the phase Ag_2Cu_2O_4. A remarkable structural change, going from a 3D arrangement to a 2D one, is been achieved thus at room temperature. The phase Ag_2Cu_2O_4 can also be obtained by oxidation of either a mixture of Ag~0/Cu~0 (1:1) or Ag_2O/CuO (1:1), which again implies a big structural change carried on at ambient conditions. The oxidation of slurries, therefore, constitutes an alternative soft chemistry solid-state method for the synthesis of new or known oxides.