# US 8,541,334 B2 · Catalyst carrier, catalyst and process for producing the same

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- Number: US 8,541,334 B2
- Document ID: US8541334B2
- Status: Granted
- Kind: B2
- Application number: 12/918,456
- Filed: 2009-02-10
- Published: 2010-12-30
- Granted: 2013-09-24
- Earliest claimed: 2008-02-20
- Assignees: Showa Denko K.K.
- Applicants: Ryuji Monden; Tadatoshi Kurozumi; Toshikazu Shishikura
- Inventors: Ryuji Monden; Tadatoshi Kurozumi; Toshikazu Shishikura
- Web page: https://patentgrep.com/patent/US8541334B2

## CPC

- H01M 4/9075: {Catalytic material supported on carriers, e.g. powder carriers (H01M4/8807, H01M4/881, H01M4/8814, H01M4/925 take precedence)}
- B01J 27/24: Nitrogen compounds
- B01J 37/0036: {Grinding}
- B01J 37/14: with gases containing free oxygen
- H01M 4/92: Metals of platinum group (H01M4/94 {, H01M4/9058} take precedence)
- H01M 4/925: {supported on carriers, e.g. powder carriers}
- B01J 27/22: Carbides
- B01J 35/33: Electric or magnetic properties
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention provides a catalyst carrier having excellent durability and capable of attaining high catalytic ability without increasing the specific surface area thereof, and a catalyst obtainable by using the catalyst carrier. The catalyst carrier of the present invention comprises a metal oxycarbonitride, preferably the metal contained in the metal oxycarbonitride comprises at least one selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel. Moreover, the catalyst of the present invention comprises the catalyst carrier and a catalyst metal supported on the catalyst carrier.

## Claims

### Claim 1

A catalyst comprising a catalyst carrier comprising a metal oxycarbonitride and a catalyst metal supported on the catalyst carrier,
wherein the catalyst metal is at least one selected from the group consisting of Pt, Ir, Ag, Pd and Ru.

### Claim 2 (depends on 1)

The catalyst according to claim 1, wherein the metal of the metal oxycarbonitride is at least one metal selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel.

### Claim 3 (depends on 1)

The catalyst according to claim 1, wherein the metal of the metal oxycarbonitride is niobium.

### Claim 4 (depends on 1)

The catalyst according to claim 1, wherein the metal oxycarbonitride has a composition represented by MCxNyOz in which M is at least one metal selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel, x, y and z are each a proportion of each atomic number and satisfy 0.01≦x≦2, 0.01≦y≦2, 0.01≦z≦3 and x+y+z≦5.

### Claim 5 (depends on 1)

The catalyst according to claim 1, which is a catalyst for fuel cells.

### Claim 6 (depends on 1)

A process for producing a catalyst as claimed in claim 1, comprising supporting the catalyst metal on the catalyst carrier.

### Claim 7 (depends on 6)

The process for producing the catalyst according to claim 6, wherein the catalyst metal is supported using a precursor of the catalyst.

### Claim 8 (depends on 1)

The catalyst according to claim 1, wherein the catalyst metal comprises metal particles having an average particle diameter of 1 to 20 nm.

### Claim 9

A catalyst comprising a catalyst carrier comprising a metal oxycarbonitride and a catalyst metal supported on the catalyst carrier,
wherein the catalyst metal comprises metal particles having an average particle diameter of 1 to 20 nm.

### Claim 10 (depends on 9)

The catalyst according to claim 9, wherein the metal of the metal oxycarbonitride is at least one metal selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel.

### Claim 11 (depends on 9)

The catalyst according to claim 9, wherein the metal of the metal oxycarbonitride is niobium.

### Claim 12 (depends on 9)

The catalyst according to claim 9, wherein the metal oxycarbonitride has a composition represented by MCxNyOz in which M is at least one metal selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel, x, y and z are each a proportion of each atomic number and satisfy 0.01≦x≦2, 0.01≦y≦2, 0.01≦z≦3 and x+y+z≦5.

### Claim 13 (depends on 9)

The catalyst according to claim 9, which is a catalyst for fuel cells.

### Claim 14 (depends on 9)

A process for producing a catalyst as claimed in claim 9, comprising supporting a catalyst metal on a catalyst carrier.

### Claim 15 (depends on 14)

The process for producing the catalyst according to claim 14, wherein the catalyst metal is supported using a precursor of the catalyst.