DENG Zhonghua, LV Gongxuan*
(State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
Abstract: 1D submicro-structured polyoxomolybdate submicro-wires, submicro-rods and nanobelts were synthesized by altering the pH value and reactants. Submicro-wires could be obtained by reacting (NH4)6Mo7O24•4H2O with sodium dodecyl benzene sulfonate (SDBS) at pH=6, and that for submicro-rods at pH=2. However, nanobelts could be synthesized by reacting (NH4)6Mo7O24•4H2O with NaCl at pH=6. In solution of pH=6, polyoxomolybdate should grow up submicro-wires in long micelles. At pH=2, not only more Mo3O102-, but also short micelles formed by excessive H+ cations, which leaded to the submicro-rods. Without template SDBS, polyoxomolybdate may exist in stable nanobelts. Cyclic voltammetry results indicated that polymolybdate submicro-rods exhibited excellent activity for oxygen electroreduction in organic solvent. Because alcohol could react with H in the electrolyte, the activity of oxygen electroreduction over polymolybdate could be obviously promoted in the presence of alcohol.
Key words: Polyoxomolybdate; 1D submicro-structured; Oxygen electroreduction; Alcohol promoted
Journal of Molecular Catalysis, Vol. 26, Issue 6, 2012, 529-536