Photo-electrochemical cell, manufacturing method of photo-electrochemical cell, and photo-electrochemical reaction device
US-2016372271-A1 · Dec 22, 2016 · US
Brownmillerite oxides for oxygen evolution catalyst
US2018142364A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018142364-A1 |
| Application number | US-201715444732-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 28, 2017 |
| Priority date | Nov 21, 2016 |
| Publication date | May 24, 2018 |
| Grant date | — |
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Abstract
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An oxygen evolution catalyst of the formula: Sr 2 MCoO 5 where M=Al, Ga wherein M is bonded with four oxygen atoms to form a tetrahedron. The catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 μA/cm 2 for a pH of 7-13. The catalyst is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 13. The oxygen evolution catalyst of the formula: Sr 2 GaCoO 5 wherein the catalyst is operated at a potential of less than 1.53 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 7. The oxygen evolution catalyst of formula: Sr 2 GaCoO 5 wherein the catalyst maintains a current within 94% after 300 minutes at a potential of 1.645 volts vs. RHE wherein the current is greater than 1 milliamp and a pH of 7.
First claim
Opening claim text (preview).
What is claimed is: 1 . An oxygen evolution catalyst comprising a material of the formula: Sr 2 MCoO 5 where M=Al, Ga wherein M is bonded with four oxygen atoms to form a tetrahedron. 2 . The oxygen evolution catalyst of claim 1 wherein the catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of from 7 to 13. 3 . The oxygen evolution catalyst of claim 1 wherein the catalyst is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 13. 4 . The oxygen evolution catalyst of claim 1 wherein the material maintains a current within 97% after 300 minutes at potentials of from 1.51 to 1.55 volts vs. RHE. 5 . The oxygen evolution catalyst of claim 1 wherein the material has the formula Sr 2 AlCoO 5 and is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 13. 6 . The oxygen evolution catalyst of claim 5 wherein the material maintains a current within 97% after 300 minutes at a potential of 1.55 volts vs. RHE. 7 . The oxygen evolution catalyst of claim 5 wherein the material has a Tafel slope of 89 mV per decade. 8 . The oxygen evolution catalyst of claim 1 wherein the material has the formula Sr 2 GaCoO 5 and is operated at a potential of less than 1.51 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 13. 9 . The oxygen evolution catalyst of claim 8 wherein the material maintains a current within 97% after 300 minutes at a potential of 1.51 volts vs. RHE. 10 . The oxygen evolution catalyst of claim 8 wherein the material has a Tafel slope of 51 mV per decade. 11 . The oxygen evolution catalyst of claim 1 further including conductive particles and a binder combined with particles of formula: Sr 2 MCoO 5 where M=Al, Ga. 12 . An oxygen evolution catalyst comprising a material of the formula: Sr 2 GaCoO 5 wherein the catalyst is operated at a potential of less than 1.53 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 7. 13 . The oxygen evolution catalyst of claim 12 wherein the material maintains a current within 96% after 300 minutes at a potential of 1.530 volts vs. RHE. 14 . The oxygen evolution catalyst of claim 12 wherein the material maintains a current within 96% after 300 minutes at a potential of 1.593 volts vs. RHE. 15 . The oxygen evolution catalyst of claim 12 wherein the material maintains a current within 94% after 300 minutes at a potential of 1.645 volts vs. RHE. 16 . The oxygen evolution catalyst of claim 15 wherein the current is greater than 1 milliamp. 17 . The oxygen evolution catalyst of claim 12 wherein the material has a Tafel slope of 87 mV per decade. 18 . An oxygen evolution catalyst comprising a material of the formula: Sr 2 AlCoO 5 wherein the catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 7. 19 . An oxygen evolution catalyst comprising a material of the formula: Sr 2 GaCoO 5 wherein the catalyst maintains a current within 94% after 300 minutes at a potential of 1.645 volts vs. RHE wherein the current is greater than 1 milliamp and a pH of 7.
Assignees
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Electric properties · CPC title
Chemistry & Metallurgy · mapped topic
by d-values or two theta-values, e.g. as X-ray diagram · CPC title
by electrolysis of water · CPC title
- C25B11/0452Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US2018142364A1 cover?
- An oxygen evolution catalyst of the formula: Sr 2 MCoO 5 where M=Al, Ga wherein M is bonded with four oxygen atoms to form a tetrahedron. The catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 μA/cm 2 for a pH of 7-13. The catalyst is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 μA/cm 2 and a pH of 13. The oxyg…
- Who is the assignee on this patent?
- Toyota Eng & Mfg North America
- What technology area does this patent fall under?
- Primary CPC classification C25B11/0452. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).