发明名称 |
Composite oxide, process for producing the same, and exhaust gas reducing co-catalyst |
摘要 |
<p>A composite oxide includes CeO2, ZrO2 and a metallic oxide being free from reacting with CeO2 and ZrO2 at 700 DEG C or more, preferably at 900 DEG C or more and further preferably at 1,000 DEG C or more. The composite oxide has a regulatory oriented phase, such as a pyrochlore phase, etc., in which at least a part of Ce cations and Zr cations are oriented regularly. The composite oxide makes a catalytic support. The CeO2-ZrO2 composite oxide and the reaction-free metallic oxide make barriers each other which suppress the granular growth when the composite oxide is subjected to high-temperature heat in a reducing heat treatment to form the regulatory oriented phase. The regulatory oriented phase improves the oxygen storage-and-release capability of the catalytic support. Thus, it is possible to simultaneously attain a large a specific surface area and a high oxygen storage-and-release capability.</p> |
申请公布号 |
EP1287876(A2) |
申请公布日期 |
2003.03.05 |
申请号 |
EP20020018807 |
申请日期 |
2002.08.22 |
申请人 |
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO |
发明人 |
MORIKAWA, AKIRA;NAGAI, YASUTAKA;TANABE, TOSHITAKA;SUZUKI, TADASHI;SUDA, AKIHIKO;SOBUKAWA, HIDEO |
分类号 |
B01D53/94;B01J21/06;B01J23/10;B01J23/63;B01J35/10;B01J37/03;(IPC1-7):B01D53/94 |
主分类号 |
B01D53/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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