# US 8,784,769 B2 · Polyelectrolyte multilayer thin film catalyst and method for producing same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,784,769 B2
- Document ID: US8784769B2
- Status: Granted
- Kind: B2
- Application number: 13/319,814
- Filed: 2010-04-07
- Published: 2012-03-01
- Granted: 2014-07-22
- Earliest claimed: 2009-05-13
- Assignees: SK Innovation Co., Ltd.
- Applicants: Young Min Chung; Yong Tak Kwon; Tae Jin Kim; Seung Hoon Oh; Chang Soo Lee; Bo Yeol Kim
- Inventors: Young Min Chung; Yong Tak Kwon; Tae Jin Kim; Seung Hoon Oh; Chang Soo Lee; Bo Yeol Kim
- Web page: https://patentgrep.com/patent/US8784769B2

## CPC

- B01J 23/44: Palladium
- B01J 23/40: of the platinum group metals
- B01J 23/50: Silver
- B01J 23/70: of the iron group metals or copper
- B01J 23/74: Iron group metals
- B01J 31/10: sulfonated
- B01J 35/391: {Physical properties of the active metal ingredient}
- B01J 37/0219: {the coating containing organic compounds}
- B01J 37/0244: {Coatings comprising several layers}
- B01J 37/16: Reducing
- C01B 15/029: Preparation from hydrogen and oxygen
- Y10S 977/773: Nanoparticle, i.e. structure having three dimensions of 100 nm or less
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Disclosed herein is a catalyst, including, in one example: a carrier, a polymer electrolyte multilayer film formed on the carrier, and metal particles dispersed in the polymer electrolyte multilayer film. The catalyst can be easily prepared, and can be used to produce hydrogen peroxide in high yield in the presence of a reaction solvent including no acid promoter.

## Claims

### Claim 1

An electrode-free catalyst for producing hydrogen peroxide from hydrogen and oxygen, consisting essentially of:
a carrier made of anionic resin having a functional group selected among a sulfonic acid group, a carboxylic acid group, a phosphoric acid group and a phosphonic acid group;
a polymer electrolyte multilayer film anchored on the carrier, in which cationic polymer electrolytes and anionic polymer electrolytes are alternately and repeatedly stacked on each other with a layer number of 2 to 30 to form the polymer electrolyte multilayer film, the cationic polymer electrolytes and the anionic polymer electrolytes each having a molecular weight of 2,000 to 500,000; and
metal particles with an average size of 1 to 100 nm dispersed within the polymer electrolyte multilayer film, in which the metal particles are formed by dispersing metal precursors corresponding to the metal particles within the polymer electrolyte multilayer film and then reducing the dispersed metal precursors using a reducing agent, said metal particles selected from the group consisting of palladium (Pd), platinum (Pt), ruthenium (Ru), rhodium (Rh), iridium (Ir), silver (Ag), osmium (Os), nickel (Ni), copper (Cu), cobalt (Co), titanium (Ti), and mixtures thereof,
said electrode-free catalyst exerting catalytic performance without electric potential.

### Claim 2 (depends on 1)

The catalyst according to claim 1, wherein the cationic polymer electrolyte is at least one selected from the group consisting of poly(allylamine)hydrochloride, polydiallyldimethylammonium, poly(ethylenediamine) and poly(acrylamide-co-diallyldimethylammonium).

### Claim 3 (depends on 1)

The catalyst according to claim 1, wherein the anionic polymer electrolyte is at least one selected from the group consisting of poly(4-styrenesulfonate), poly(acrylic acid), poly(acrylamide), poly(vinylphosphonic acid), poly(2-acrylamido-2-methyl-11-propanesulfonic acid), poly(anethole sulfonic acid) and poly(vinylsulfonate).

### Claim 4 (depends on 1)

The catalyst according to claim 1, wherein the layer number is in the range of 2 to 15.