中文摘要：

不同铜、锌摩尔比（nCu/nZn）的前驱体和催化剂通过传统共沉淀法制取,利用XRD,FTIR,AAS,H2-TPR等手段对其进行微观性质的分析,重点探究Cu/Zn投料比对前驱体物相间的转变及催化剂分散性的影响。结果表明：原料中Cu~（2＋）和Zn~（2＋）浓度不同,导致同晶取代反应推动力与物相形成能间有所差异,进而决定前驱体的物相组成。当nCu/nZn〉75/25时,Zn取代Cu的反应推动力大于（Cu1-x,Znx）2（OH）_2CO_3的形成能,得到纯（Cu1-x,Znx）2（OH）_2CO_3物相;当nCu/nZn≤40/60时,Cu取代Zn反应推动力大于（Zn1-x,Cux）5（CO3）_2（OH）_6的形成能,获得单一物相的（Zn1-x,Cux）5（CO3）2（OH）6;

英文摘要：

The CuO/ZnO precursors and catalysts with different Cu/Zn atomic ratios（nCu/nZn）were obtained by traditional co-precipitation method.The microscopic properties of precursors and catalysts were further characterized through XRD,FT-IR,AAS and H2-TPR,with emphasis on the effect of the nCu/nZnon phase transition of precursors and dispersion of the catalysts.The results show that different concentration of Cu~（2＋）and Zn~（2＋）in raw material results in the difference between impetus of isomorphous substitution reaction and the formation energy of phase,thus controlling the phase composition of the precursor.When nCu/nZn75/25,the reactive impetus of the isomorphous substitution of Cu~（2＋）in Cu_2（CO_3）（OH）_2compound by Zn~（2＋）is greater than the formation energy of（Cu1-x,Znx）2（OH）_2CO_3phase,the precursors contain pure（Cu1-x,Znx）_2（OH）_2CO_3phase;When nCu/nZn≤40/60,the reactive impetus of Zn~（2＋）substitution by Cu~（2＋）in the Zn5（CO_3）_2（OH）_6 phase exceeds the formation energy of（Zn1-x,Cux）5（CO_3）_2（OH）_6phase,and the precursors of single（Zn1-x,Cux）_5（CO_3）_2（OH）_6 phase can be gained;When 40/60nCu/nZn≤75/25,the precursors are consisted of（Cu,Zn）_2（OH）_2CO_3and（Zn,Cu）5（CO_3）_2（OH）_6.active CuO components are well dispersed in ZnO components after high-temperature calcination,thus having good dispersion and low reduction temperature.