典型文献
Synthesis and characterization of the flower-like LaxCe1-xO1.5+δ catalyst for low-temperature oxidative coupling of methane
文献摘要：
Lanthanum-based oxides are promising candidates for low-temperature oxidative coupling of methane(OCM).To further lower the OCM reaction temperature,the Ce doped flower-like La2O2CO3 microsphere catalysts were synthesized,achieving a significantly low reaction temperature(375℃)while maintain-ing high C2* hydrocarbon selectivity(43.0％).Doping Ce into the lattice of La2O2CO3 created more surface oxygen vacancies and bulk lattice defects,which was in favor of the transformation and migration of oxy-gen species at 350-400℃.The designed H2 temperature-programmed reduction(H2-TPR)experiments provided strong evidence that the low reaction temperature of LaxCe1-xO1.5+δ can be attributed to the transformation and migration of oxygen species,which dynamically generated surface oxygen vacancies for continuous oxygen activation to selectively convert methane.Moreover,designed temperature-programmed surface reaction(TPSR)clarified that two kinds of surface oxygen species in LaxCe1-xO1.5+δ catalysts were concerned with catalytic performance,that is,the surface chemisorbed oxy-gen species for the activation of CH4 and the formation of CH3·intermediates,surface La-Ce-O lattice oxygen species that caused the excessive oxidation of CH3·intermediates.Finally,the factors affecting the transformation and migration of oxygen species were explored.
文献关键词：
中图分类号：
作者姓名：
Ru Feng;Pengyu Niu;Bo Hou;Qiang Wang;Litao Jia;Minggui Lin;Debao Li
作者机构：
State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China;University of Chinese Academy of Sciences,Beijing 100049,China;Dalian National Laboratory For Clean Energy,Chinese Academy of Sciences,Dalian 116023,Liaoning,China
文献出处：
引用格式：
[1]Ru Feng;Pengyu Niu;Bo Hou;Qiang Wang;Litao Jia;Minggui Lin;Debao Li-.Synthesis and characterization of the flower-like LaxCe1-xO1.5+δ catalyst for low-temperature oxidative coupling of methane)[J].能源化学,2022(04):342-353
A类：
LaxCe1,xO1,La2O2CO3
B类：
Synthesis,characterization,flower,like,5+,temperature,oxidative,coupling,methane,Lanthanum,oxides,are,promising,candidates,OCM,To,further,reaction,doped,microsphere,catalysts,were,synthesized,achieving,significantly,while,maintain,high,C2,hydrocarbon,selectivity,Doping,into,lattice,created,more,surface,oxygen,vacancies,bulk,defects,which,was,favor,transformation,migration,species,designed,H2,programmed,reduction,TPR,experiments,provided,strong,evidence,that,attributed,dynamically,generated,continuous,activation,selectively,convert,Moreover,TPSR,clarified,two,kinds,concerned,catalytic,performance,chemisorbed,CH4,CH3,intermediates,caused,excessive,oxidation,Finally,factors,affecting,explored
AB值：
0.455045
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