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CATALYST, METHOD FOR PRODUCING CATALYST, AND METHOD FOR PRODUCING HYDROGEN-CONTAINING GAS USING CATALYST, AND HYDROGEN GENERATING DEVICE, FUEL CELL SYSTEM, AND SILICON-SUPPORTED CeZr-BASED OXIDE
CATALYST, METHOD FOR PRODUCING CATALYST, AND METHOD FOR PRODUCING HYDROGEN-CONTAINING GAS USING CATALYST, AND HYDROGEN GENERATING DEVICE, FUEL CELL SYSTEM, AND SILICON-SUPPORTED CeZr-BASED OXIDE
An object of the present invention is to provide a catalyst in which a reaction initiation temperature at which self-heating function is exhibited is low and which is capable of suppressing carbon accumulation even when a reaction is repeated. The catalyst of the present invention is a catalyst including a CeZr-based oxide, silicon, and a catalytically active metal, wherein the CeZr-based oxide satisfies Ce x Zr y O 2 (x + y = 1) and the silicon satisfies molar ratios of 0.02 ‰¤ Si/Zr and 0.01 Si/(Ce + Zr + Si) 0.2. When the catalyst is used, a reduction temperature for generating initial oxygen deficiency can be decreased. Depending on the catalytically active metal, a reduction activation treatment can be performed even at about 20°C without any need for heating. In a repeated hydrogen generating reaction, the deposition of carbon generated on the surface of the catalyst can be suppressed, and a decrease in catalytic activity can be prevented. Therefore, the catalytic performance can be maintained over a long period of time.
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机译:本发明的目的是提供一种催化剂,在该催化剂中表现出自热功能的反应起始温度低并且即使重复反应也能够抑制碳积聚。本发明的催化剂是包括基于CeZr的氧化物,硅和催化活性金属的催化剂,其中所述基于CeZr的氧化物满足Ce x Zr y O 2(x + y = 1),并且硅满足摩尔比。 0.02‰¤Si / Zr和0.01 展开▼