Effect of precipitants on Ni-CeO_2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction

作     者：王路辉 刘辉 刘源 陈英 杨淑清 WANG Luhui;LIU Hui;LIU Yuan;CHEN Ying;YANG Shuqing

作者机构：Department of Chemical Engineering School of Petrochemical Technology and Energy Engineering Zhejiang Ocean University School of Food and Pharmaceutical Zhejiang Ocean University Department of Catalysis Sciences and Technology School of Chemical Engineering Tianjin University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2013年第31卷第10期

页      面：969-974页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Project supported by Natural Science Foundation of Zhejiang Province(Y4110220) Foundation of the Zhejiang Provincial Department of Education(Y200908245) Foundation of the Dinghai Academy of Science and Technology(201006) 

主　　题：reverse water-gas shift reaction Ni-CeO2 catalyst co-precipitation oxygen vacancy precipitant rare earths 

摘      要：A series of Ni-CeO2 catalysts were prepared by co-precipitation method with Na2CO3, NaOH, and mixed precipitant （Na2CO3：NaOH; 1：1 ratio） as precipitant, respectively. The effect of the precipitants on the catalytic performance, physical and chemical properties of Ni-CeO2 catalysts was investigated with the aid of X-ray diffraction （XRD）, Bmmaner-Emmett-Teller method （BET）, Fou- rier-transform infrared spectroscopy （FT-IR）, thermogravimetry （TG）, and H2-TPR characterizations. The Ni-CeO2 catalysts were exam- ined with respect to their catalytic performance for the reverse water-gas shift reaction, and their catalytic activities were ranked as： Ni-CeO2-CP （Na2CO3：NaOH=I：I）〉Ni-CeO2-CP（Na2CO3）〉Ni-CeO2-CP（NaOH）- Correlating to the characteristic results, it was found that the catalyst prepared by co-precipitation with mixed precipitant （Na2CO3：NaOH; 1：1 ratio） as precipitant hadthe most amount of oxygen vacancies accompanied with highly dispersed Ni particles, which made the corresponding Ni-CeO2-CP（Na2CO3：NaOH=I： 1） catalyst exhibit the highest catalytic activity. While the precipitant of Na2CO3 or NaOH resulted in less or no oxygen vacancies in Ni-CeO2 catalysts. As a result, Ni-CeO2-CP（Na2CO3） and Ni-CeO2-CP（NaOH） catalysts presented poor catalytic performance.