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Journal Articles

Time evolution of palladium structure change with redox fluctuations in a LaFePdO$$_{3}$$ perovskite automotive catalyst by high-speed analysis with in situ DXAFS

Uenishi, Mari*; Tanaka, Hirohisa*; Taniguchi, Masashi*; Tan, Isao*; Nishihata, Yasuo; Mizuki, Junichiro; Kobayashi, Tetsuhiko*

Catalysis Communications, 9(2), p.311 - 314, 2008/02

 Times Cited Count:32 Percentile:63.72(Chemistry, Physical)

In the LaFePdO$$_{3}$$ perovskite catalyst, redox fluctuations of the exhaust gas suppress the growth of particles of precious metal by causing Pd to move in and out of the perovskite crystal. To observe the real movements of Pd directly, the time evolution of local structure around Pd by redox fluctuations was investigated by in situ energy-dispersive X-ray absorption fine-structure (DXAFS) analysis with a 10ms resolution. We proved that the change in structure of Pd is sufficiently fast to respond to the control frequency (1-4Hz) of an actual gasoline engine and that the Pd particles that segregate out are extremely fine.

Journal Articles

Self-regenerating Rh- and Pt-based perovskite catalysts for automotive-emissions control

Tanaka, Hirohisa*; Taniguchi, Masashi*; Uenishi, Mari*; Kajita, Nobuhiko*; Tan, Isao*; Nishihata, Yasuo; Mizuki, Junichiro; Narita, Keiichi*; Kimura, Mareo*; Kaneko, Kimiyoshi*

Angewandte Chemie; International Edition, 45(36), p.5998 - 6002, 2006/09

 Times Cited Count:142 Percentile:93.27(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

The Intelligent catalyst having the self-regenerative function of Pd, Rh and Pt for automotive emissions control

Tanaka, Hirohisa*; Uenishi, Mari*; Taniguchi, Masashi*; Tan, Isao*; Narita, Keiichi*; Kimura, Mareo*; Kaneko, Kimiyoshi*; Nishihata, Yasuo; Mizuki, Junichiro

Catalysis Today, 117(1-3), p.321 - 328, 2006/09

 Times Cited Count:178 Percentile:98.02(Chemistry, Applied)

no abstracts in English

Journal Articles

The Intelligent catalyst; Pd-perovskite having the self-regenerative function in a wide temperature range

Tanaka, Hirohisa*; Tan, Isao*; Uenishi, Mari*; Taniguchi, Masashi*; Nishihata, Yasuo; Mizuki, Junichiro

Key Engineering Materials, 317-318, p.827 - 832, 2006/08

no abstracts in English

Journal Articles

The Self-regenerative "intelligent" catalyst for automotive emissions control

Tan, Isao*; Taniguchi, Masashi*; Tanaka, Hirohisa*; Uenishi, Mari*; Kajita, Nobuhiko*; Nishihata, Yasuo; Mizuki, Junichiro; Niihara, Koichi*

Key Engineering Materials, 317-318, p.833 - 836, 2006/08

no abstracts in English

Journal Articles

LaFePdO$$_{3}$$ perovskite automotive catalyst having a self-regenerative function

Tanaka, Hirohisa*; Tan, Isao*; Uenishi, Mari*; Taniguchi, Masashi*; Kimura, Mareo*; Nishihata, Yasuo; Mizuki, Junichiro

Journal of Alloys and Compounds, 408-412, p.1071 - 1077, 2006/02

 Times Cited Count:49 Percentile:90.02(Chemistry, Physical)

no abstracts in English

Journal Articles

Development of a Rh-intelligent catalyst

Naito, Kazuya*; Tanaka, Hirohisa*; Taniguchi, Masashi*; Uenishi, Mari*; Tan, Isao*; Kajita, Nobuhiko*; Takahashi, Ichiro*; Suzuki, Hiromasa*; Narita, Keiichi*; Hirai, Akimasa*; et al.

SAE 2006 World Congress & Exhibition Technical Papers, 8 Pages, 2006/00

no abstracts in English

Journal Articles

An Intelligent catalyst

Tanaka, Hirohisa*; Uenishi, Mari*; Tan, Isao*; Kimura, Mareo*; Mizuki, Junichiro; Nishihata, Yasuo

SAE 2001 World Congress Paper; Advanced Catalytic Converters and Substrates for Gasoline Emission Systems (SP1573), p.1 - 8, 2001/00

The catalyst of the crystalline ceramics known as a perovskite-type oxide was designed and controlled at the atomic level in order to create a new function for self-regeneration of precious metals in a usage ambience without auxiliary treatment.

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