US 12,291,790 B2
Water electrolysis catalyst and manufacturing method thereof
Chanho Pak, Gwangju (KR); Chaekyung Baik, Gwangju (KR); and Seungwoo Lee, Gwangju (KR)
Assigned to GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Gwangju (KR)
Filed by GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Gwangju (KR)
Filed on Jun. 29, 2021, as Appl. No. 17/361,838.
Claims priority of application No. 10-2020-0080237 (KR), filed on Jun. 30, 2020.
Prior Publication US 2021/0404074 A1, Dec. 30, 2021
Int. Cl. C25B 11/081 (2021.01); B01J 23/46 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); B01J 37/12 (2006.01); B01J 37/16 (2006.01); C25B 1/04 (2021.01)
CPC C25B 11/081 (2021.01) [B01J 23/468 (2013.01); B01J 37/04 (2013.01); B01J 37/08 (2013.01); B01J 37/12 (2013.01); B01J 37/16 (2013.01); C25B 1/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A catalyst for water electrolysis, the catalyst comprising:
diffraction patterns with 2θ diffraction angles of 9.26±0.1°, 19.01±0.1°, 29.64±0.1°, 37.64±0.1°, 56.79±0.1°, 67.50±0.1°, and 79.81±0.1° in X-ray diffraction (XRD) analysis; and
an iridium mixed phase including:
a physical mixture of iridium(III) oxide (Ir2O3) and iridium(IV) oxide (IrO2), or
a physical mixture of metal iridium (Ir), iridium(III) oxide (Ir2O3), and iridium(IV) oxide (IrO2),
wherein the catalyst has a structure in which nanosheets having the iridium mixed phase are stacked.