Invention Grant
- Patent Title: Washcoating technique for perovskite catalysts
- Patent Title (中): 钙钛矿催化剂的涂层技术
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Application No.: US12571606Application Date: 2009-10-01
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Publication No.: US08343888B2Publication Date: 2013-01-01
- Inventor: Chang H Kim , Wei Li , Kevin A Dahlberg
- Applicant: Chang H Kim , Wei Li , Kevin A Dahlberg
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Reising Ethington P.C.
- Main IPC: B01J23/00
- IPC: B01J23/00 ; B01J21/00 ; B01J29/00 ; B01J37/00

Abstract:
Precursor cations of A and B elements of an ABO3 perovskite in aqueous solution are formed as an ionic complex gel with citric acid or other suitable polybasic carboxylic acid. The aqueous gel is coated onto a desired catalyst substrate and calcined to form, in-situ, particles of the crystalline perovskite as, for example, an oxidation catalyst on the substrate. In one embodiment, a perovskite catalyst such as LaCoO3 is formed on catalyst supporting cell walls of an extruded ceramic monolith for oxidation of NO in the exhaust gas of a lean burn vehicle engine.
Public/Granted literature
- US20110082030A1 WASHCOATING TECHNIQUE FOR PEROVSKITE CATALYSTS Public/Granted day:2011-04-07
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