CuO-ZnO(atomic ratio Cu : Zn = 1 : 1 )and CuO-ZnO-Al2O3 ( atomic ratio Cu : Zn : Al= 6 : 3 : 1 ) catalysts for low pressure methanol synthesis were prepared by a conventional coprecipitation method. Surface characterization of those catalysts were performed using XPS combined with a reactor system shown in Fig. 1 under simulated industrial operating conditions. Specimens were prepared by pressing powdered catalysts into small pellets, evacuated in the pretreatment chamber at room temperature ...