US 11,901,566 B2
Bifunctional oxygen electrocatalyst, preparation method and use thereof
Rufan Zhang, Beijing (CN); Chenhui Zhou, Beijing (CN); Haibing Meng, Beijing (CN); and Ying Han, Beijing (CN)
Assigned to Tsinghua University, Beijing (CN)
Filed by Tsinghua University, Beijing (CN)
Filed on Oct. 8, 2021, as Appl. No. 17/497,034.
Claims priority of application No. 202011471559 (CN), filed on Dec. 14, 2020.
Prior Publication US 2022/0190357 A1, Jun. 16, 2022
Int. Cl. H01M 4/92 (2006.01); H01M 12/08 (2006.01); H01M 4/86 (2006.01)
CPC H01M 4/923 (2013.01) [H01M 12/08 (2013.01); H01M 2004/8689 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for preparing a bifunctional oxygen electrocatalyst, the bifunctional oxygen electrocatalyst being represented by A1-x-yBxCyO2, wherein;
element A is one selected from the group consisting of Pt, Ir, Ru, and Pd;
each of element B and element C is selected from the group consisting of Mo, Mn, Fe, Co, Ni, Cu, and Zn;
the bifunctional oxygen electrocatalyst is a three-dimensional porous foam sheet catalyst; and
x and y represent atomic percentages of the element B and the element C, respectively, and a sum of atomic percentages of the element A, the element B and the element C in the catalyst is 100 at. %;
optionally, the element B is the same as the element C;
the method comprising;
1) mixing a metal salt of the element A, a metal salt of the element B, a metal salt of the element C with a carbohydrate and a gas generating compound uniformly in water to form a precursor solution; and
2) pre-sintering the precursor solution, and calcining the product obtained after pre-sintering to obtain the bifunctional oxygen electrocatalyst.