The phase structure and surface state of P_2O_5-V_2O_5 catalysts was studied by X-ray diffraction (XRD), infrared (IR) and electron spin resonance(EBR) spectroscopy.

• 用XRD、IR及ESR等方法,考察了P_2O_6-V_2O_5的晶相结构,结果证明(VO)_2P_2O_7(B相)对于丁烷氧化制顺酐,有良好的催化效果。