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In Situ Processing of a Porous Calcium Zirconate/Magnesia Composite with Platinum Nanodispersion and Its Influence on Nitric Oxide Decomposition
Author(s) -
Suzuki Yoshikazu,
Hwang Hae Jin,
Kondo Naoki,
Ohji Tatsuki
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb01079.x
Subject(s) - porosity , decomposition , composite number , platinum , materials science , pyrolysis , chemical engineering , zirconate , catalysis , magnesium , composite material , chemistry , metallurgy , ceramic , organic chemistry , engineering , titanate
A porous CaZrO 3 /MgO composite with ∼1% nanodispersed platinum was synthesized in air using several in situ reactions, including the pyrolysis of PtO 2 . The composite had a uniformly open, three‐dimensional pore structure (porosity of 56%), with a narrow pore‐size distribution. Catalytic NO decomposition to N 2 and O 2 and NO reduction by C 2 H 4 were investigated up to 900°C. In the absence of oxygen, the NO conversion rate reached ∼52% for the direct decomposition and ∼100% for the reduction by C 2 H 4 . The results suggested the possibility of the porous composite as a multifunctional filter for simultaneous filtering of hot gas and removal of NO x .