Nanometric Colloidal Sols of CeO2-ZrO2 Solid Solution as Catalyst Modifiers. II. TWC Performance

作者：Tanimoto Kenji; Kato Hirokazu; Takeshita Shoya; Hidaka Miyuki; Hinokuma Satoshi; Machida Masato^*

来源：Bulletin of the Chemical Society of Japan, 2013, 86(11): 1327-1332.

DOI：10.1246/bcsj.20130183

A stable colloidal sol consisting of CeO2-ZrO2 solid solution (CZ) was studied as an efficient modifier for supported Rh catalysts. After coating CZ sol onto Al2O3 by simple impregnation, the catalytic activity for CO-NO-C3H6-O-2 reaction increased to a different extent depending on an air-to-fuel weight ratio (A/F). A significant effect on the activity arises largely from water-gas shift reaction and C3H6 steam-reforming in a rich region (A/F %26lt; 14.6), and promoted C3H6O2 reaction in a lean region (A/F %26gt; 14.6). Moreover, CZ coating yielded an oxygen storage capacity (OSC), the effect of which could be highlighted in the catalytic reaction under a dynamic lean-rich perturbation.

• 出版日期2013-11-15