Hydrogen gas generating member and hydrogen gas producing method therefor

Patent metadata

Field	Value
Publication number	US-9617622-B2
Application number	US-67432308-A
Country	US
Kind code	B2
Filing date	Aug 11, 2008
Priority date	Aug 29, 2007
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A hydrogen gas generating member includes a metal alloy having dispersed aluminum. The metal alloy includes an Al—X alloy, where X is Sn: 10.1 to 99.5% by mass, Bi: 30.1 to 99.5% by mass, In: 10.1 to 99.5% by mass, Sn +Bi: 20.1 to 99.5% by mass, Sn +In: to 10 to 99.5% by mass, Bi+In: 20.1 to 99.5% by mass, or Sn+Bi+In: 20 to 99.5% by mass. Hydrogen gas is generated by bringing the hydrogen gas generating member into contact with water.

First claim

The invention claimed is:

1. A hydrogen gas generating member comprising:
an Al—X alloy which comprises a matrix and Al dispersed in the matrix, wherein
X is Sn: 60 to 99.5% by mass, Bi: 30.1 to 99.5% by mass, In: 10.1 to 99.5% by mass, Sn+Bi: 20.1 to 99.5% by mass, Sn+In: 80 to 99.5% by mass, Bi+In: 20.1 to 99.5% by mass, or Sn+Bi+In: 20 to 99.5% by mass,
the Al—X alloy is separated into a first solid phase of Al crystal grains and a second solid phase of crystal grains of the matrix,
a number average domain diameter of the Al crystal grains is 0.01 to 500 μm, and
hydrogen gas is generated by bringing the hydrogen gas generating member into contact with water.

2. The hydrogen gas generating member according to claim 1 , wherein the Al—X alloy is an Al—X—Y alloy that further comprises Y, and
Y is Pb: 0.01 to 20% by mass, Zn: 0.01 to 30% by mass, Si: 0.01 to 20% by mass, Cd:0.01 to 20% by mass, Cu: 0.01 to 20% by mass, Fe: 0.01 to 5% by mass, Ga: 0.01 to 30% by mass, Ge: 0.01 to 30% by mass, Hg: 0.01 to 20% by mass, Mg: 0.01 to 20% by mass, Ni: 0.01 to 5% by mass, S: 0.01 to 5% by mass, or Mn: 0.01 to 5% by mass,
the total content of Y is lower than 60% by weight even when a plurality of Y elements is contained in the alloy, and
the content of X by weight is larger than half of the total content of Y by weight.

3. The hydrogen gas generating member according to claim 1 , wherein the hydrogen gas generating member comprises a plate having a rolling ratio of 30 to 99.99 %.

4. The hydrogen gas generating member according to claim 1 , wherein the hydrogen gas generating member comprises powders having a weight average particle diameter of 5 to 400 μm.

5. The hydrogen gas generating member according to claim 2 , wherein the hydrogen gas generating member comprises a plate having a rolling ratio of 30 to 99.99 %.

6. The hydrogen gas generating member according to claim 2 , wherein the hydrogen gas generating member comprises powders having a weight average particle diameter of 5 400 μm.

Assignees

• Ishida Kiyohito
• Kainuma Ryosuke
• Ohnuma Ikuo
• Omori Toshihiro
• Takaku Yoshikazu
• Hagisawa Takehito
• Japan Science & Tech Agency

Inventors

• Ishida Kiyohito
• Kainuma Ryosuke
• Ohnuma Ikuo
• Omori Toshihiro
• Takaku Yoshikazu
• Hagisawa Takehito

Classifications

• C22C13/00

  Alloys based on tin · CPC title

• C01B3/08

  by reaction of inorganic compounds with metals · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22C12/00 Primary

  Alloys based on antimony or bismuth · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title