CATALYST USING Pd-Ru SOLID SOLUTION ALLOY FINE PARTICLES

• US 20150231605A1
• Filed: 09/18/2013
• Published: 08/20/2015
• Est. Priority Date: 09/18/2012
• Status: Active Grant

• Current Assignee: Japan Science & Technology Trading Co. Limited
• Original Assignee: Japan Science & Technology Trading Co. Limited
• Inventors: Kitagawa, Hiroshi, Kusada, Kohei, Nagaoka, Katsutoshi, Sato, Katsutoshi, Kutubi, Md. Shahajahan
• Granted Patent: US 9,452,417 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B01D 2255/1023 Palladium
• CPC Class Codes: B01D 2255/1026 Ruthenium
• CPC Class Codes: B01D 53/9418 for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
• CPC Class Codes: B01D 53/945 characterised by a specific catalyst
• CPC Class Codes: B01J 23/462 Ruthenium
• CPC Class Codes: B01J 23/63 with rare earths or actinides
• CPC Class Codes: B01J 35/0013 Colloids
• CPC Class Codes: B01J 35/002 Catalysts characterised by their physical properties
• CPC Class Codes: B01J 35/23 in a colloidal state
• CPC Class Codes: B01J 35/30 characterised by their physical properties
• CPC Class Codes: B01J 37/0009 Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
• CPC Class Codes: B01J 37/0036 Grinding
• CPC Class Codes: B01J 37/0063 Granulating
• CPC Class Codes: B01J 37/0211 using a colloidal suspension
• CPC Class Codes: B01J 37/08 Heat treatment B01J37/0009, B01J37/0018 take precedence
• CPC Class Codes: B01J 37/16 Reducing
• CPC Class Codes: B22F 1/054 Nanosized particles
• CPC Class Codes: B22F 9/24 starting from liquid metal compounds, e.g. solutions
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C07B 37/04 Substitution
• CPC Class Codes: C07C 1/321 : the hetero-atom being a non-metal atom
• CPC Class Codes: C07C 15/14 : all phenyl groups being directly linked
• CPC Class Codes: C07C 2523/44 : Palladium
• CPC Class Codes: C07C 2523/46 : Ruthenium, rhodium, osmium or iridium
• CPC Class Codes: C07C 37/16 : by condensation involving hydroxy groups of phenols or alcohols or the ether or mineral ester group derived therefrom
• CPC Class Codes: C07C 45/61 : by reactions not involving the formation of >C = O groups
• CPC Class Codes: C07C 45/64 : by introduction of functional groups containing oxygen only in singly bound form
• CPC Class Codes: C22C 1/0466 : Alloys based on noble metals
• CPC Class Codes: Y02A 50/20 : Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 : Improving ICE efficiencies

Abstract

The catalyst disclosed is a catalyst including palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution. The palladium-ruthenium alloy fine particles used in this catalyst can be produced by a production method including the step of maintaining a solution containing a protective agent, a reducing agent, a palladium compound or palladium ions, and a ruthenium compound or ruthenium ions at a temperature equal to or higher than a predetermined temperature.

Claims

1. A catalyst comprising palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution.

2. The catalyst according to claim 1, wherein the alloy fine particles have a composition represented by Pd_X—

Ru_1-X, where x satisfies 0.1≦

x≦

0.9.

3. The catalyst according to claim 1, being an oxidation catalyst for carbon monoxide.

4. The catalyst according to claim 1, being a reduction catalyst for nitrogen oxide.

5. The catalyst according to claim 1, being an oxidation catalyst for hydrogen gas.

6. The catalyst according to claim 1, being an oxidation catalyst for hydrocarbon.

7. The catalyst according to claim 1, being a catalyst for Suzuki-Miyaura cross-coupling.

8. A method for producing an organic compound, comprising performing Suzuki-Miyaura cross-coupling by using the catalyst according to claim 1.

9. A method for producing palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution,

the method comprising the step of maintaining a solution containing a protective agent, a reducing agent, a palladium compound or palladium ions, and a ruthenium compound or ruthenium ions at a temperature equal to or higher than a predetermined temperature.