Synthesis and Characterization of Heteropolyoxomolybdates

(NH₄)₆[TeMo₆O₂₄]·7H₂O and Na₃[CrMo₆(OH₆)O₁₈]·8H₂O were prepared according to a reference and confirmed by the IR spectrum.^{24 (link)} Other chemicals were of reagent grade and were used without further purification. FT-IR data were taken on a 60 Scimitar 2000 Near FT-IR Spectrometer by using KBr pellets in the range of 4000–500 cm⁻¹. Thermogravimetric analyses (TGA) were carried out on a Pyris Diamond TG instrument under a flowing N₂ atmosphere with a heating rate of 10 °C min⁻¹. Powder X-ray diffraction data were recorded on an Ultima IV with D/teX Ultra diffractometer at 40 KV and 40 mA with Cu Kα (λ = 1.5406 Å) radiation. C, H, and N elemental analyses were carried out on a Perkin-Elmer 240C elemental analyser. A CHI 760 electrochemical workstation was used for the electrochemical experiments at room temperature.