Oxygen reduction catalyst and method for producing same
US-9947936-B2 · Apr 17, 2018 · US
Oxygen reduction catalyst and production method therefor
US10050282B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10050282-B2 |
| Application number | US-201515127962-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 27, 2015 |
| Priority date | Mar 25, 2014 |
| Publication date | Aug 14, 2018 |
| Grant date | Aug 14, 2018 |
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Abstract
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The present invention provides a novel oxygen reduction catalyst having a good stability and a high oxygen reduction performance. The oxygen reduction catalyst includes: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta.
First claim
Opening claim text (preview).
The invention claimed is: 1. An oxygen reduction catalyst comprising: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta. 2. The oxygen reduction catalyst according to claim 1 , wherein the oxide of the transition metal is represented by TiO 2-x , ZrO 2-x , NbO 2-x or TaO 2-x , with the proviso that 0<x≤0.2. 3. The oxygen reduction catalyst according to claim 1 , wherein the conductive oxide is an oxide(s) of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta. 4. The oxygen reduction catalyst according to claim 3 , wherein the conductive oxide is Ti 4 O 7 , Ti 3 O 5 , Ti 2 O 3 , TiO, Ti 3 O 2 , ZrO, NbO or TaO. 5. The oxygen reduction catalyst according to claim 3 , wherein the conductive oxide and the oxide of the transition metal are formed so as to form a composite substance. 6. A fuel cell comprising the oxygen reduction catalyst according to claim 1 as an air electrode. 7. An air cell comprising the oxygen reduction catalyst according to claim 1 as an air electrode. 8. A method for producing the oxygen reduction catalyst according to claim 1 , comprising mixing 5 to 50% by mass of an oxide selected from the group consisting of the oxides of Ti, Zr, Nb and Ta with 50 to 95% by mass of a conductive oxide so as to be supported at least on the surface of the conductive oxide to prepare a mixture, and then performing a heat treatment of the mixture in an inert gas atmosphere of 1 to 100% of hydrogen at 800 to 1300° C.
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Classifications
Vanadium, niobium or tantalum · CPC title
- H01M4/9016Primary
Oxides, hydroxides or oxygenated metallic salts · CPC title
Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof · CPC title
Positive electrodes · CPC title
with gases containing free hydrogen · CPC title
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- What does patent US10050282B2 cover?
- The present invention provides a novel oxygen reduction catalyst having a good stability and a high oxygen reduction performance. The oxygen reduction catalyst includes: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta.
- Who is the assignee on this patent?
- Nat Univ Corp Yokohama Nat Univ
- What technology area does this patent fall under?
- Primary CPC classification H01M4/9016. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 14 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).