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The aim of this study is to prepare CuO–CeO 2  composite by means of mechanical milling and to investigate its characteristics as a catalyst. The structural and morphological features of milled samples are observed by X-ray diffractometry and scanning electron microscopy. The redox property and total OSC (oxygen storage capacity) of the milled sample were measured by using GC-TCD and TG-DTA, which are important parameters to indicate the effectiveness of catalysts. Interestingly, reduction of CuO is repeatedly observed when milling of CuO–CeO 2  powder mixture is processed in air. The redox property of milled CuO–CeO 2  sample is investigated by H 2 -TPR, where three reduction peaks are observed for 0 h milling and only one broad peak for various other milling times. The total OSC of mechanically driven CuO–CeO 2  catalyst is much higher than that of the CeO 2 –ZrO 2  traditional catalyst system at low temperatures.

Structure and catalytic behaviour of CuO–CeO 2 prepared by high-energy ball milling

Structure and catalytic behaviour of CuO–CeO ₂ prepared by high-energy ball milling