TY - JOUR
T1 - Scandium and copper co-doping effect on stability and activity to the NO direct decomposition of Ba3Y4O9
AU - Fang, Siman
AU - Takagaki, Atsushi
AU - Watanabe, Motonori
AU - Song, Jun Tae
AU - Ishihara, Tatsumi
N1 - Funding Information:
This study was financially supported by a Grant-in-Aid for Specially Promoted Research (No. 16H06293 , 19H00821 ) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan through the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7/25
Y1 - 2020/7/25
N2 - Direct decomposition of NO on Ba3Y4O9 doped with Cu and Sc was studied and it was found that co-doping of Sc and Cu into Ba3Y4O9 was effective for increasing both lattice stability and NO decomposition activity. In particular, Ba3Y3Sc0.6Cu0.4O9 (10 % Cu and 15 % Sc doping) catalyst showed N2 and O2 yield of 90 % and 99 %, respectively, in NO decomposition reaction at 700 ℃. Comparing with the pristine and single-metal doped system, the optimized catalyst showed superior long-term stability and increased activity under O2, and water vapor co-existence conditions because of the increased stability of crystal structure, improved lattice oxygen mobility and weakened oxygen adsorption on the surface. TPD and in-situ FT-IR results suggested that the co-doping effect was assigned to the easier removal of surface NO2− or NO3− species which blocks the active site to NO decomposition.
AB - Direct decomposition of NO on Ba3Y4O9 doped with Cu and Sc was studied and it was found that co-doping of Sc and Cu into Ba3Y4O9 was effective for increasing both lattice stability and NO decomposition activity. In particular, Ba3Y3Sc0.6Cu0.4O9 (10 % Cu and 15 % Sc doping) catalyst showed N2 and O2 yield of 90 % and 99 %, respectively, in NO decomposition reaction at 700 ℃. Comparing with the pristine and single-metal doped system, the optimized catalyst showed superior long-term stability and increased activity under O2, and water vapor co-existence conditions because of the increased stability of crystal structure, improved lattice oxygen mobility and weakened oxygen adsorption on the surface. TPD and in-situ FT-IR results suggested that the co-doping effect was assigned to the easier removal of surface NO2− or NO3− species which blocks the active site to NO decomposition.
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U2 - 10.1016/j.apcata.2020.117743
DO - 10.1016/j.apcata.2020.117743
M3 - Article
AN - SCOPUS:85087891608
SN - 0926-860X
VL - 602
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 117743
ER -