Advantages and disadvantages of barium oxide addition to bimetallic Pd-Rh three-way catalysts supported on zirconia-doped alumina

被引：6

作者：

Alikin, Evgeny A. ^{[1
]}

Baksheev, Evgeny O. ^{[1
,2
]}

Veselov, Grigory B. ^{[3
]}

Kenzhin, Roman M. ^{[3
]}

Stoyanovskii, Vladimir O. ^{[3
]}

Plyusnin, Pavel E. ^{[4
]}

Shubin, Yury, V ^{[4
]}

Vedyagin, Aleksey A. ^{[3
]}

机构：

[1] Ecoalliance LLC, Novouralsk 624131, Russia

[2] Ural Fed Univ, Dept Rare Met & Nanomat, Ekaterinburg 620075, Russia

[3] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[4] Nikolaev Inst Inorgan Chem SB RAS, Novosibirsk 630090, Russia

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 03期

关键词：

Three-way catalysts; Bimetallic Pd -Rh catalysts; Thermal aging; Barium oxide; Metal -support interaction; Characterization; BASIC METAL ADDITIVES; STABILITY; BAO; OXIDATION; PD/AL2O3; NOX; CO; REDUCTION; KINETICS; RHODIUM;

D O I：

10.1016/j.jece.2024.112945

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Due to enhanced high -temperature stability, zirconia-stabilized alumina is widely used as a support of three-way catalysts. The addition of barium oxide is known to improve the catalytic performance of the composition. In order to go in-depth about the effects of BaO addition, a series of samples was prepared using nitrates and complex salts as a precursor. The interaction of BaO with alumina was found to change dramatically the metalsupport interaction of the latter with metals. Thus, the presence of BaO resulted in the sintering of Pd with the formation of agglomerated Pd0 species, which explains a lower activity in CO oxidation of the BaO-doped samples after thermal treatment. Contrarily, the addition of barium nitrate showed a positive effect, inhibiting the collapse of the porous structure of the support, which was the most crucial and accompanied by the formation of the alpha-Al2O3 phase when no barium nitrate was added.

引用

页数：15

共 58 条

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