Effect of precipitants on Ni-CeO2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction
来源期刊：Journal of Rare Earths2013年第10期
论文作者：王路辉 刘辉 刘源 陈英 杨淑清
文章页码：969 - 974
摘 要：A series of Ni-CeO2catalysts 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-CeO2catalysts was investigated with the aid of X-ray diffraction（XRD）,Brumauer-Emmett-Teller method（BET）,Fourier-transform infrared spectroscopy（FT-IR）,thermogravimetry（TG）,and H2-TPR characterizations.The Ni-CeO2catalysts were examined 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=1:1）>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 had the most amount of oxygen vacancies accompanied with highly dispersed Ni particles,which made the corresponding Ni-CeO2-CP（Na2CO3:NaOH=1:1）catalyst exhibit the highest catalytic activity.While the precipitant of Na2CO3or NaOH resulted in less or no oxygen vacancies in Ni-CeO2catalysts.As a result,Ni-CeO2-CP（Na2CO3）and Ni-CeO2-CP（NaOH）catalysts presented poor catalytic performance.
王路辉1，刘辉2，刘源3，陈英1，杨淑清1
1. Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang Ocean University2. School of Food and Pharmaceutical, Zhejiang Ocean University3. Department of Catalysis Sciences and Technology, School of Chemical Engineering, Tianjin University
摘 要：A series of Ni-CeO2catalysts 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-CeO2catalysts was investigated with the aid of X-ray diffraction（XRD）,Brumauer-Emmett-Teller method（BET）,Fourier-transform infrared spectroscopy（FT-IR）,thermogravimetry（TG）,and H2-TPR characterizations.The Ni-CeO2catalysts were examined 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=1:1）>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 had the most amount of oxygen vacancies accompanied with highly dispersed Ni particles,which made the corresponding Ni-CeO2-CP（Na2CO3:NaOH=1:1）catalyst exhibit the highest catalytic activity.While the precipitant of Na2CO3or NaOH resulted in less or no oxygen vacancies in Ni-CeO2catalysts.As a result,Ni-CeO2-CP（Na2CO3）and Ni-CeO2-CP（NaOH）catalysts presented poor catalytic performance.
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