WATER SPLITTING OXYGEN EVOLVING CATALYST, METHOD OF PREPARARING THE CATALYST, ELECTRODE HAVING THE CATALYST AND WATER SPLITTING OXYGEN EVOLVING DEVICE HAVING THE ELECTRODE

摘要

PURPOSE: A water splitting oxygen generating catalyst, a method for preparing the same, an electrode, and a device for generating water splitting oxygen are provided to increase the specific surface area of a water splitting oxygen generating catalyst by containing a flake-shaped metal oxide, thereby increasing the activity of the catalyst. CONSTITUTION: A water splitting oxygen generating catalyst is represented by chemical formula 1, Co1-xMxOy, and contains a flake-shaped metal oxide. In chemical formula 1, M is Al, In, Ga, Si, or Sn; and x and y satisfy inequations, 0=x0.5 and 1y2, respectively. The aspect ratio of the metal oxide is in the range of 50-500. The specific surface area of the metal oxide measured with an electrochemical method is in the range of 50-1000 m^2/g. A method for preparing a water splitting oxygen generating catalyst comprises the steps of: preparing one or more metal nitrate aqueous solutions (12); injecting the metal nitrate aqueous solutions into a 3-electrode cell (10) comprising a working electrode (WE0,WE1,WE2), a reference electrode (RE), and a counter electrode (CE); forming a metal hydroxide based on the metal nitrate aqueous solutions; electrochemically coating the metal hydroxide on the working electrode; and thermally treating the working electrode, and converting the metal hydroxide into a metal oxide.