Iridium alloy catalyst having reversible catalytic activity and preparation method thereof
US11588157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2021 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | May 28, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Proposed is an iridium alloy catalyst having reversible catalytic activity for an oxygen evolution reaction (OER), a hydrogen evolution reaction (HER), and a hydrogen oxidation reaction (HOR) by including an iridium alloy including iridium (Ir) and nickel (Ni). The iridium alloy catalyst according to the present disclosure is rapidly converted to an iridium alloy catalyst in an oxide form and an iridium alloy catalyst in a metallic form according to applied voltage by controlling its crystallinity. Thus, even in case an oxide layer is formed after the OER, the oxidation layer disappears during the HER and HOR and the properties of an iridium metal catalyst remain, thereby maintaining HER/HOR performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.