Abstract
The precursor powder of CaVO_3 was prepared by sol-gel method using vanadium pentoxide,calcium nitrate,citric acid,and oxalic acid as raw materials.The target product CaVO_3 was obtained by calcining the precursor powder in argon atmosphere at 1000 °C.In order to determine the appropriate calcination temperature,thermal stability of the precursor powder was tested.The target product CaVO_3 was characterized by Fourier transform infrared(FTIR) spectrometry,thermogravimetry(TG),X-ray diffraction(XRD),and conductivity.In addition,the properties for oxygen reduction reaction(ORR) were also investigated,and the results showed that the electron transfer number of ORR on the modified electrode was1.5-1.7,which indicating that ORR was a two-electron process.
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