US 12,258,667 B2
Oxygen evolution reaction electrode catalyst assembly comprising dendritic nickel foam, its use and a method to produce said assembly
Adèle Peugeot, Paris (FR); Marc Fontecave, Saint Ismier (FR); Charles Creissen, Cambridge (GB); and Moritz Wilhelm Schreiber, Seneffe (BE)
Assigned to TOTALENERGIES ONETECH, Courbevoie (FR); and COLLÈGE DE FRANCE, Paris (FR)
Appl. No. 18/701,701
Filed by TOTALENERGIES ONETECH, Courbevoie (FR); and COLLÈGE DE FRANCE, Paris (FR)
PCT Filed Oct. 3, 2022, PCT No. PCT/EP2022/077449
§ 371(c)(1), (2) Date Apr. 16, 2024,
PCT Pub. No. WO2023/066645, PCT Pub. Date Apr. 27, 2023.
Claims priority of application No. 21315200 (EP), filed on Oct. 18, 2021.
Prior Publication US 2024/0328005 A1, Oct. 3, 2024
Int. Cl. C25B 11/00 (2021.01); C25B 1/04 (2021.01); C25B 11/031 (2021.01); C25B 11/061 (2021.01); C25B 11/089 (2021.01)
CPC C25B 11/031 (2021.01) [C25B 1/04 (2013.01); C25B 11/061 (2021.01); C25B 11/089 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A method to produce an oxygen evolution reaction electrode catalyst assembly comprising a dendritic nickel foam; the method is characterized in that it comprises the steps
(a) providing a dendritic nickel foam material being a nickel foam that shows a dendrite morphology evidenced by scanning electron microscopy with nickel dendrites forming a nickel dendrites layer;
(b) etching the dendritic nickel foam material by placing it in a etch solution having a pH ranging from 1.0 to 4.0 and being an aqueous acidic solution or an aqueous solution of metal chloride, and recovering an etched dendritic nickel foam with nickel dendrites showing a chimney-like structure that is porous with three levels of porosity and shows pores of a first type having an average pore size diameter ranging from 20.0 μm to 50.0 μm as determined by scanning electron microscopy, pores of a second type having an average pore size diameter ranging from 1.0 to 5.0 μm as determined by scanning electron microscopy, and pores of a third type having an average pore size diameter ranging from 0.1 μm to 1.0 μm as determined by scanning electron microscopy; and
(c) of addition of one or more transition metals, wherein step (c) comprises a step (c1) of galvanic exchange reaction or a step (c2) of electrodeposition or both steps c1) of galvanic exchange reaction and step (c2) of electrodeposition.