Umicore Shokubai Japan Co., Ltd.

Kenji Ashikari

Yuji Ogino

Masashi Nakashima

Shigekazu Minami

Masanori Ikeda

Hideki Goto

Hirotaka Kuno

Yusuke Haneda

Kazuyoshi Komata

An object of the present invention is to provide means for improving the hydrogen generation properties of a hydrogen-producing catalyst. A hydrogen-producing catalyst according to one aspect of the present invention comprises Rh and a composite containing Al, Ce, and Zr. When a ratio of the number of Al atoms to the number of Ce atoms (Al/Ce) in the composite measured by X-ray fluorescence (XRF) analysis is Rand a ratio of the number of Al atoms to the number of Ce atoms (Al/Ce) in the composite measured by an X-ray photoelectron spectroscopy (XPS) method is R, a value of R/Ris greater than 2.25 and less than 5.92.

Hydrogen-producing catalyst and exhaust gas purifying catalyst using same

In order to provide an exhaust gas purification catalyst capable of purifying hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gas at low temperatures, the exhaust gas purification catalyst according to the present invention includes: a region () containing palladium on a three-dimensional structure (), and a first region () and a second region () provided on the region () in order from an inflow side of exhaust gas to an outflow side of exhaust gas. The concentration of neodymium contained in the first region () is higher than the concentration of neodymium contained in the second region ().

Exhaust gas purification catalyst and exhaust gas purification method using the same

The present invention provides an exhaust gas purifying catalyst which can maintain high catalyst activity even after the exhaust gas purifying catalyst is exposed to an exhaust gas at a high temperature for a long period of time. The exhaust gas purifying catalyst contains a Pd&#x2014;Pr complex and PdO, and the Pd&#x2014;Pr complex is represented by PrPdO, where a=1 to 3, b=1 to 10, and c=1 to 6.

Exhaust gas purifying catalyst and method for purifying exhaust gas

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Himeji, Japan

Kenji Ashikari