Effect of synthesis condition on properties of Ce0.67Zr0.33O2 mixed oxides and its application in Pd-only three-way catalysts
作者： Bo Zhao , Qiuyan Wang , Guangfeng Li , Renxian Zhou
DOI: 10.1016/J.JALLCOM.2010.08.101
关键词:
摘要: Abstract Ce0.67Zr0.33O2 (CZ) mixed oxide was prepared by coprecipitation and effect of the synthesis conditions on CZ properties were investigated in this work, as well catalytic performance Pd-only three-way catalyst (TWC) supported CZ. With increase aging temperature during precipitation, crystallite size increases significantly, while oxygen storage capacity complete (OSCC) drops no notable porosity is observed. The mainly determined drying pH value precipitation. Prepared under optimized (precipitation at 9.5, 25 °C then supercritical condition alcohol), samples exhibit good properties. This preparation procedure leads to with proper pore distribution, larger average (20.42 nm), higher volume (0.69 cm3/g) enhanced OSCC (383.0 μmol/g). Furthermore, TWC synthesized exhibits satisfactory activity very low reduction (53 °C).
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