Support carbon material and catalyst for solid polymer type fuel cell use

Patent metadata

Field	Value
Publication number	US-10103398-B2
Application number	US-201615561440-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Mar 26, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A support carbon material able to support a catalyst metal in a highly dispersed state and resistant to the flooding phenomenon and with little voltage drop even at the time of large current power generation under high humidity conditions and a catalyst using the same, specifically, a support carbon material for solid polymer type fuel cell use comprised of a porous carbon material which has a pore volume and a pore area found by the BJH analysis method from a nitrogen adsorption isotherm in an adsorption process of a radius 2 nm to 50 nm pore volume V A of 1 ml/g to 5 ml/g and a radius 2 nm to 50 nm pore area S 2-50 of 300 m 2 /g to 1500 m 2 /g and a ratio (V 5-25 /V A ) of radius 5 nm to 25 nm pore volume V 5-25 (ml/g) to said pore volume V A (ml/g) of 0.4 to 0.7 and a ratio (V 2-5 /V A ) of radius 2 nm to 5 nm pore volume V 2-5 (ml/g) to the same of 0.2 to 0.5 and a catalyst using the same.

First claim

The invention claimed is:

1. A support carbon material for solid polymer type fuel cell use comprised of a porous carbon material which has a pore volume and a pore area found by the BJH analysis method from a nitrogen adsorption isotherm in an adsorption process satisfying the following conditions:
a radius 2 nm to 50 nm pore volume V A of 1 ml/g to 5 ml/g and a radius 2 nm to 50 nm pore area S 2-50 of 300 m 2 /g to 1500 m 2 /g and
a ratio (V 5-25 /V A ) of radius 5 nm to 25 nm pore volume V 5-25 (ml/g) to said pore volume V A (ml/g) of 0.4 to 0.7 and a ratio (V 2-5 /V A ) of radius 2 nm to 5 nm pore volume V 2-5 (ml/g) to the same of 0.2 to 0.5.

2. The support carbon material for solid polymer type fuel cell use according to claim 1 wherein said pore volume V 5-25 is 0.7 ml/g to 2 ml/g.

3. The support carbon material for solid polymer type fuel cell use according to claim 1 or 2 wherein an average particle radius is 0.1 μm to 5 μm.

4. A catalyst for solid polymer type fuel cell use comprising
a support carbon material for solid polymer type fuel cell use according to any one of claim 1 at which catalyst metal particulates comprised of Pt or a Pt alloy having Pt as its main component are supported.

5. A catalyst for solid polymer type fuel cell use comprising
a support carbon material for solid polymer type fuel cell use according to claim 2 at which catalyst metal particulates comprised of Pt or a Pt alloy having Pt as its main component are supported.

6. A catalyst for solid polymer type fuel cell use comprising
a support carbon material for solid polymer type fuel cell use according to claim 3 at which catalyst metal particulates comprised of Pt or a Pt alloy having Pt as its main component are supported.

Assignees

• Nippon Steel & Sumitomo Metal Corp
• Nippon Steel & Sumikin Chem Co

Inventors

• Furukawa Shinya
• Iijima Takashi
• Hiyoshi Masataka
• Matsumoto Katsumasa
• Negi Noriyuki
• Hayashida Hiroyuki

Classifications

• C01B32/342

  characterised by non-gaseous activating agents · CPC title

• H01M4/90

  Selection of catalytic material · CPC title

• H01M4/86

  Inert electrodes with catalytic activity, e.g. for fuel cells · CPC title

• C01B32/336

  characterised by gaseous activating agents · CPC title

• B01J23/42

  Platinum · CPC title