Suppression of Noble Metal Sintering Based on the Support Anchoring Effect and its Application in Automotive Three-Way Catalysis View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2009-12

AUTHORS

Hirofumi Shinjoh, Miho Hatanaka, Yasutaka Nagai, Toshitaka Tanabe, Naoki Takahashi, Takeru Yoshida, Yoshiharu Miyake

ABSTRACT

Suppression of noble metal sintering is a very important approach in the development of automotive three-way catalysts. The investigation into the Pt sintering behavior revealed that the formed Pt–O–M (M: cation of oxide, i.e., cerium oxide) bond acted as an anchor to suppress the Pt sintering, and that the strength of the Pt-oxide-support interaction was well correlated with the electron density of oxygen in the support oxide. To achieve a good balance between catalytic activity and the sintering suppression, ceria based oxide support was verified to be suitable for Pt, and zirconia based oxide support was appropriate support for Rh. Through optimizing the configuration of Pt and Rh in the catalyst, a novel three-way catalyst was developed successfully, and this catalytic activity is far superior to the conventional catalyst, but with lower noble metal content. More... »

PAGES

1967

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11244-009-9371-5

DOI

http://dx.doi.org/10.1007/s11244-009-9371-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1035455420


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