# US 2022/0032276 A1 · Functional structure

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- Number: US 2022/0032276 A1
- Document ID: US20220032276A1
- Status: Published application
- Kind: A1
- Application number: 17/299,672
- Filed: 2019-12-03
- Published: 2022-02-03
- Earliest claimed: 2018-12-03
- Assignees: National University Corporation Hokkaido University; Furukawa Electric Co., Ltd.
- Applicants: National University Corporation Hokkaido University; Furukawa Electric Co., Ltd.
- Inventors: Mai NISHII; Yuichiro BANBA; Kaori SEKINE; Yukako NAKAI; Masayuki FUKUSHIMA; Sadahiro KATO; Takao MASUDA; Yuta NAKASAKA; Takuya YOSHIKAWA
- Web page: https://patentgrep.com/patent/US20220032276A1

## CPC

- B01J 23/75: Cobalt
- B01J 29/76: Iron group metals or copper
- B01J 35/45: Nanoparticles
- B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
- B01J 35/643: {less than 2 nm}
- B01J 35/647: {2-50 nm}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

A functional structure which can resist a decrease in the function of the functional material and thus have a long life, can be free from the need for complicated replacement operation, can contribute to resource-saving, and can exhibit high catalytic activity when used, for example, as a catalyst. The functional structure includes supports each having porous structure and including a zeolite-type compound, and at least one functional substance present in the supports, in which each of the supports has channels communicating with one another, the functional material is present at least in the channel of each of the supports, and the supports have an average external size of 20 μm or less.

## Claims

### Claim 1

A functional structure comprising:
supports each having a porous structure and including a zeolite-type compound; and
at least one functional material present in the supports, wherein
each of the supports has channels communicating with one another,
the functional material is present at least in the channel of each of the supports, and
the supports have an average external size of 20 μm or less.

### Claim 2 (depends on 1)

The functional structure according to claim 1, wherein
the channels have any one of a one-dimensional pore, a two-dimensional pore, and a three-dimensional pore defined by framework structure of the zeolite-type compound, and have an enlarged pore portion different from the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore, and
the functional material is present at least in the enlarged pore portion.

### Claim 3 (depends on 2)

The functional structure according to claim 2, wherein the enlarged pore portion connects a plurality of pores constituting any one of the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore.

### Claim 4 (depends on 2)

The functional structure according to claim 2, wherein the functional material has an average particle size larger than an average inner diameter of the channels and equal to or smaller than an inner diameter of the enlarged pore portion.

### Claim 5 (depends on 1)

The functional structure according to claim 1, wherein
the functional material comprises a catalytic material, and
each of the supports carries at least one catalytic material.

### Claim 6 (depends on 5)

The functional structure according to claim 5, wherein
the catalytic material contains a metal element (M), and
the metal element (M) is included in an amount from 0.5 to 2.5 mass % with respect to the functional structure.

### Claim 7 (depends on 1)

The functional structure according to claim 1, wherein the supports have an average external size of 50 nm or more and 1.00 μm or less.

### Claim 8 (depends on 1)

The functional structure according to claim 1, wherein the supports have a thickness of 0.05 μm or more and 0.60 μm or less.

### Claim 9 (depends on 1)

The functional structure according to claim 1, wherein
the supports have a plate-like external shape,
the supports have an average external size of more than 1.00 μm and 20.00 μm or less, and
the supports have a ratio (L/D ratio) of maximum external size (L) to thickness (D) of 21 or less.

### Claim 10 (depends on 5)

The functional structure according to claim 5, wherein the catalytic material has an average particle size of 0.08 nm to 50 nm.

### Claim 11 (depends on 5)

The functional structure according to claim 5, wherein the ratio of the average particle size of the catalytic material to the average inner diameter of the channels is from 0.05 to 500.

### Claim 12 (depends on 1)

The functional structure according to claim 1, wherein the channels have an average inner diameter of 0.1 nm to 1.5 nm.

### Claim 13 (depends on 1)

The functional structure according to claim 1, further comprising at least one additional functional material held on an outer surface of the framework.

### Claim 14 (depends on 13)

The functional structure according to claim 13, wherein the content of at least one functional material present in the framework is higher than the content of the at least one additional functional material held on the outer surface of the framework.

### Claim 15 (depends on 1)

The functional structure according to claim 1, wherein the zeolite-type compound is a silicate compound.