TY - JOUR
T1 - Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co-Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene
AU - Zhu, Lei
AU - Pan, Shunlong
AU - Liu, Zhiying
AU - Wei, Ping
AU - Liu, Zhuyun
AU - Yu, Peng
AU - Xu, Yanhua
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Rare earth metal (RE = La, Pr, Nd, Y)-doped CoCeOx catalysts were prepared and evaluated for eliminating chlorobenzene (CB). Characterization results showed that the doped RE metal simultaneously acts as a structural and electronic assistant, which changes the coordination environment of Ce ions and enhances the interaction between Co and Ce species, thus improving the catalytic performance and chlorine resistance of CoCeOx. Besides, dynamic "redox gears" based on the Co/Ce redox couples were proposed. RE metal doping was found to promote the movement of "gears", which led to increased surface active oxygen and oxygen mobility, accelerating the complete oxidation of CB and the rapid removal of deposited chlorine. CoCeYOx exhibited the best redox-promoting effect, with 90% CB conversion observed at 256 °C and reduced generation of dichlorobenzene. Moreover, the effect of gaseous oxygen on the CB oxidation process was also studied.
AB - Rare earth metal (RE = La, Pr, Nd, Y)-doped CoCeOx catalysts were prepared and evaluated for eliminating chlorobenzene (CB). Characterization results showed that the doped RE metal simultaneously acts as a structural and electronic assistant, which changes the coordination environment of Ce ions and enhances the interaction between Co and Ce species, thus improving the catalytic performance and chlorine resistance of CoCeOx. Besides, dynamic "redox gears" based on the Co/Ce redox couples were proposed. RE metal doping was found to promote the movement of "gears", which led to increased surface active oxygen and oxygen mobility, accelerating the complete oxidation of CB and the rapid removal of deposited chlorine. CoCeYOx exhibited the best redox-promoting effect, with 90% CB conversion observed at 256 °C and reduced generation of dichlorobenzene. Moreover, the effect of gaseous oxygen on the CB oxidation process was also studied.
UR - http://www.scopus.com/inward/record.url?scp=85083672276&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.9b07086
DO - 10.1021/acs.iecr.9b07086
M3 - 文章
AN - SCOPUS:85083672276
SN - 0888-5885
VL - 59
SP - 5686
EP - 5698
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 13
ER -