Catalyst manufacturing method

Abstract

To provide a method for producing a catalyst that enables an inorganic oxide to be selectively attached to the surface of a noble metal catalyst or a noble metal alloy catalyst.SOLUTION: A method for producing a catalyst 10 includes the step for causing an inorganic oxide 13 to be selectively attached to the surface of a noble metal catalyst 12 by applying light to a liquid that contains particles, each having the noble metal catalyst 12 supported on a carrier 11 with photocatalytic functions, a precursor of the inorganic oxide 13, and water.SELECTED DRAWING: Figure 1

Claims

1. A step of irradiating a liquid containing particles on which a noble metal catalyst or noble metal alloy catalyst is supported on a carrier having photocatalytic function, an inorganic oxide precursor, water, a pore-forming agent, and a nitrate with ultraviolet light to deposit the inorganic oxide onto the surface of the noble metal catalyst or noble metal alloy catalyst, A method for producing a catalyst, comprising the step of forming pores by calcining a carrier on which the inorganic oxide and the pore-forming agent are attached to the surface of the noble metal catalyst or noble metal alloy catalyst.

2. A step of obtaining a second liquid by partially hydrolyzing the inorganic oxide precursor in a first liquid containing an inorganic oxide precursor, water, a pore-forming agent, a nitrate, and an acid catalyst, A step of obtaining a third liquid by adding to the second liquid particles on which a noble metal catalyst or noble metal alloy catalyst is supported on a carrier having photocatalytic function, and a pH adjusting agent. A step of irradiating the third liquid with ultraviolet light to deposit the inorganic oxide onto the surface of the noble metal catalyst or noble metal alloy catalyst, A method for producing a catalyst, comprising the step of forming pores by calcining a carrier on which the inorganic oxide and the pore-forming agent are attached to the surface of the noble metal catalyst or noble metal alloy catalyst.

3. The method for producing a catalyst according to claim 1 or 2, wherein the aforementioned precious metal includes palladium.

4. The method for producing a catalyst according to claim 1 or 2, wherein the carrier contains titanium oxide.

5. The inorganic oxide includes silicon dioxide, The method for producing a catalyst according to claim 1 or 2, wherein the inorganic oxide precursor comprises tetraalkyl orthosilicate.

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