Scandium and copper co-doping effect on stability and activity to the NO direct decomposition of Ba3Y4O9

被引：6

作者：

Fang, Siman ^{[1
]}

Takagaki, Atsushi ^{[2
,3
]}

Watanabe, Motonori ^{[1
,2
,3
]}

Song, Jun Tae ^{[2
,3
]}

Ishihara, Tatsumi ^{[1
,2
,3
]}

机构：

[1] Kyushu Univ, Grad Sch Integrated Frontier Sci, Dept Automot Sci, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Fac Engn, Dept Appl Chem, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2020年 / 602卷 / 602期

基金：

日本学术振兴会;

关键词：

NO decomposition; Ba3Y4O9; Co-doping effect; CATION SEGREGATION; REACTION-MECHANISM; NITROGEN MONOXIDE; CATALYTIC PROCESS; REDUCTION; OXIDE; ADSORPTION; O-2; N-2; FE;

D O I：

10.1016/j.apcata.2020.117743

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 N-2 and O-2 yield of 90 % and 99 %, respectively, in NO decomposition reaction at 700 degrees C. Comparing with the pristine and single-metal doped system, the optimized catalyst showed superior long-term stability and increased activity under O-2, 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.

引用

页数：9

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