CuCe-O_x催化剂表面物种对CO催化氧化性能影响
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摘要
选取不同沉淀剂采用共沉淀法制备了CuCe-Ox复合氧化物催化剂.考察了沉淀剂对其CO催化氧化性能的影响.研究表明以氨水为沉淀剂的催化剂CO氧化活性最佳,它与CuCe-Ox催化剂具有较多的Ce~(3+)以及CuO物种有关.此外,采用氨水作为沉淀剂可促进CuO的生成,这是CO催化氧化的主要活性位点.
In this paper,CuCe-O_xcomposite oxide catalysts are prepared by the co-precipitation method with different precipitants. The effect of the precipitants on its CO oxidation performance is investigated. The study shows that the catalyst with ammonia as the precipitant has the best CO oxidation activity,which is related to Cu-Ce-O_x catalysts with more Ce~(3+) and CuO species. In addition,the use of ammonia as a precipitant can promote the formation of CuO,which is the main active site for CO oxidation.
In this paper,CuCe-O_xcomposite oxide catalysts are prepared by the co-precipitation method with different precipitants. The effect of the precipitants on its CO oxidation performance is investigated. The study shows that the catalyst with ammonia as the precipitant has the best CO oxidation activity,which is related to Cu-Ce-O_x catalysts with more Ce~(3+) and CuO species. In addition,the use of ammonia as a precipitant can promote the formation of CuO,which is the main active site for CO oxidation.
引文
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[5]卢小林,刘子魁,马素芳,等. Dy和Y掺杂改性对Cu O/Ce Zr O2催化剂在富氢气氛中CO优先氧化催化性能的影响[J].燃料化学学报,2016,44(7):870-875.
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[13] SCHMIEG S J,BELTON D N. Effect of hydrothermal aging on oxygen storage/release and activity in a commercial automotive catalyst[J]. Applied Catalysis B Environmental,1995,6(2):127-144.
[14] HORI C E,PERMANA H,NG K Y S,et al. Thermal stability of oxygen storage properties in a mixed Ce O2-Zr O2system[J]. Applied Catalysis B Environmental,2015,16(2):105-117.
[15] MRABET D,ABASSI A,CHERIZOL R,et al. Onepot solvothermal synthesis of mixed Cu-Ce-Oxnanocatalysts and their catalytic activity for low temperature CO oxidation[J]. Applied Catalysis A General,2012,447–448(24):60-66.
[16] MAI H,ZHANG D,SHI L,et al. Highly active Ce1-x CuxO2,nanocomposite catalysts for the low temperature oxidation of CO[J]. Applied Surface Science,2011,257(17):7551-7559.
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[19] ZHONG W,QU Z,XIE Q,et al. Selective catalytic oxidation of ammonia to nitrogen over Cu O-Ce O2,mixed oxides prepared by surfactant-templated method[J].Applied Catalysis B Environmental,2013,134-135(9):153-166.
[20] GUAN B,LIN H,ZHU L,et al. Effect of ignition temperature for combustion synthesis on the selective catalytic reduction of NOx,with NH3,over Ti0. 9Ce0. 05V0. 05O2-δ,nanocomposites catalysts prepared by solution combustion route[J]. Chemical Engineering Journal,2012,181-182(10):307-322.
[21] MESHKANI F,REZAEI M. Preparation of nanocrystalline metal(Cr,Al,Mn,Ce,Ni,Co and Cu)modified ferrite catalysts for the high temperature water gas shift reaction[J]. Renewable Energy,2015,74(C):588-598.
[22] GAO X,JIANG Y,ZHONG Y,et al. The activity and characterization of Ce O2-Ti O2catalysts prepared by the sol-gel method for selective catalytic reduction of NO with NH3[J]. Journal of Hazardous Materials,2010,174(1):734-739.
[23] RICOTE S,JACOBS G,MILLING M,et al. Low temperature water-gas shift:characterization and testing of binary mixed oxides of ceria and zirconia promoted with Pt[J]. Applied Catalysis A General,2006,303(1):35-47.
[24] LIESE T,GRUERT W. Cu-Na-ZSM-5 catalysts prepared by chemical transport:investigations on the role of bronsted acidity and of excess copper in the selective catalytic reduction of NO by propene[J]. Journal of Catalysis,1997,172(1):34-45.
[25] CORMA A,PALOMARES A,MARQUEZ F. Determining the nature of the active sites of Cu-Beta zeolites for the selective catalytic reduction(SCR)of NOx by using a coupled reaction-XAES/XPS study[J]. Journal of Catalysis,1997,170(1):132-139.
[26] KUANG L,HUANG P,SUN H,et al. Preparation and characteristics of nano-crystalline Cu-Ce-Zr-O composite oxides via a green route:supercritical anti-solvent process[J].稀土学报(英文版),2013,31(2):137-144.
[2]俞俊,吴贵升,毛东森,等. La2O3助剂对Au/Ti O2催化氧化CO性能的影响[J].物理化学学报,2008,24(10):1751-1755.
[3]谭海燕,吴金平.金属有机骨架材料MIL-53(Al)负载钴催化剂的CO催化氧化反应性能[J].物理化学学报,2014,30(4):715-722.
[4]张秋林,徐利斯,刘昕,等. P123软模板对Cu O-Ce O2结构及其CO催化氧化性能的影响[J].无机化学学报,2015,31(8):1555-1562.
[5]卢小林,刘子魁,马素芳,等. Dy和Y掺杂改性对Cu O/Ce Zr O2催化剂在富氢气氛中CO优先氧化催化性能的影响[J].燃料化学学报,2016,44(7):870-875.
[6]黄攀,陈永东,赖南君,等.不同金属改性对Pt/β-分子筛催化柴油车尾气中HC、CO及SO2氧化性能的影响[J].燃料化学学报,2016,44(7):882-887.
[7] GAO F,LUNDWALL M,GOODMAN D W. Infrared reflection absorption spectroscopy study of CO adsorption and reaction on oxidized Pd(100)[J]. Journal of Physical Chemistry C,2008,112(15):6057-6064.
[8] CHIN S Y,ALEXEEY O S,AMIRIDIS M D. Structure and reactivity of Pt-Ru/Si O2,catalysts for the preferential oxidation of CO under excess H2[J]. Journal of Catalysis,2006,243(2):329-339.
[9] MINEMURA Y,KURIYAMA M,ITO S I,et al. Additive effect of alkali metal ions on preferential CO oxidation over Pt/Al2O3[J]. Catalysis Communications,2006,7(9):623-626.
[10] OH S H,SINKEVITCH R M. Carbon monoxide removal from hydrogen-rich fuel cell feedstreams by selective catalytic oxidation[J]. Journal of Catalysis,1993,142(1):254-262.
[11] MAITRA A M. Critical performance evaluation of catalysts and mechanistic implications for oxidative coupling of methane[J]. Applied Catalysis A General,1993,104(1):11-59.
[12] PUTNA E S,AED J M V,GORTE R J. Evidence for weakly bound oxygen on ceria films[J]. Journal of Physical Chemistry,1996,100(45):17862-17865.
[13] SCHMIEG S J,BELTON D N. Effect of hydrothermal aging on oxygen storage/release and activity in a commercial automotive catalyst[J]. Applied Catalysis B Environmental,1995,6(2):127-144.
[14] HORI C E,PERMANA H,NG K Y S,et al. Thermal stability of oxygen storage properties in a mixed Ce O2-Zr O2system[J]. Applied Catalysis B Environmental,2015,16(2):105-117.
[15] MRABET D,ABASSI A,CHERIZOL R,et al. Onepot solvothermal synthesis of mixed Cu-Ce-Oxnanocatalysts and their catalytic activity for low temperature CO oxidation[J]. Applied Catalysis A General,2012,447–448(24):60-66.
[16] MAI H,ZHANG D,SHI L,et al. Highly active Ce1-x CuxO2,nanocomposite catalysts for the low temperature oxidation of CO[J]. Applied Surface Science,2011,257(17):7551-7559.
[17] JIA A P,HU G S,MENG L,et al. CO oxidation over Cu O/Ce1-xCuxO2-delta and Ce1-xCuxO2-delta catalysts:synergetic effects and kinetic study[J]. Journal of Catalysis,2012,289:199-209.
[18] LIU W,FLYTZANI-STEPHANOPOULOS M. Transition metal-promoted oxidation catalysis by fluorite oxides:A study of CO oxidation over Cu O-Ce O2[J]. Chemical Engineering Journal&the Biochemical Engineering Journal,1996,64(2):283-294.
[19] ZHONG W,QU Z,XIE Q,et al. Selective catalytic oxidation of ammonia to nitrogen over Cu O-Ce O2,mixed oxides prepared by surfactant-templated method[J].Applied Catalysis B Environmental,2013,134-135(9):153-166.
[20] GUAN B,LIN H,ZHU L,et al. Effect of ignition temperature for combustion synthesis on the selective catalytic reduction of NOx,with NH3,over Ti0. 9Ce0. 05V0. 05O2-δ,nanocomposites catalysts prepared by solution combustion route[J]. Chemical Engineering Journal,2012,181-182(10):307-322.
[21] MESHKANI F,REZAEI M. Preparation of nanocrystalline metal(Cr,Al,Mn,Ce,Ni,Co and Cu)modified ferrite catalysts for the high temperature water gas shift reaction[J]. Renewable Energy,2015,74(C):588-598.
[22] GAO X,JIANG Y,ZHONG Y,et al. The activity and characterization of Ce O2-Ti O2catalysts prepared by the sol-gel method for selective catalytic reduction of NO with NH3[J]. Journal of Hazardous Materials,2010,174(1):734-739.
[23] RICOTE S,JACOBS G,MILLING M,et al. Low temperature water-gas shift:characterization and testing of binary mixed oxides of ceria and zirconia promoted with Pt[J]. Applied Catalysis A General,2006,303(1):35-47.
[24] LIESE T,GRUERT W. Cu-Na-ZSM-5 catalysts prepared by chemical transport:investigations on the role of bronsted acidity and of excess copper in the selective catalytic reduction of NO by propene[J]. Journal of Catalysis,1997,172(1):34-45.
[25] CORMA A,PALOMARES A,MARQUEZ F. Determining the nature of the active sites of Cu-Beta zeolites for the selective catalytic reduction(SCR)of NOx by using a coupled reaction-XAES/XPS study[J]. Journal of Catalysis,1997,170(1):132-139.
[26] KUANG L,HUANG P,SUN H,et al. Preparation and characteristics of nano-crystalline Cu-Ce-Zr-O composite oxides via a green route:supercritical anti-solvent process[J].稀土学报(英文版),2013,31(2):137-144.