Yttrium oxide IrO2 is a peroxide structure. After the infiltrated oxygen forms IrO(2+x), the structure will not be destroyed. Therefore, the coating of this material is widely used in oxygen evolution anodes and titanium with dissolved salt iridium oxide coating. Oxygen-evolving anodes are widely used in the electrolysis industry because they have low oxygen evolution potential and are insoluble in the electrolyte . They have sufficient mechanical and chemical resistance to the released oxygen .
In order to further improve the stability of its electrolytic performance, people have developed composite oxide coatings, such as IrO2-Ta2O5 coatings. However, tantalum salts are expensive and require high temperatures to form composite oxide coatings, so people continue to research better composite oxide coatings.
Here, tin oxide , cerium oxide have made their grand debut.
The hydrogen evolution potential of the cerium oxide-tin oxide-iridium oxide system
The hydrogen evolution potential of the iridium oxide-cerium oxide system
The hydrogen evolution potential of some other composite oxide coating systems
Knowledge points: Iridium oxide, cerium oxide
Iridium oxide is a Chemical material. It is an iridium oxide whose characteristics are clearly known. Its lattice is a rutile structure, which contains six-coordinated iridium and three-coordinated oxygen. Iridium dioxide and other rare metal oxides can be used as anode electrodes in industrial electrolysis, as well as microelectrodes used in electrophysiological research.
Cerium oxide is an inorganic substance with a chemical formula of CeO2 and a light yellow or tan auxiliary powder. Density 7.13g/cm3, melting point 2397°C, insoluble in water and alkali, slightly soluble in acid. At a temperature of 2000°C and a pressure of 15MPa, cerium oxide can be reduced with hydrogen to obtain cerium trioxide. When the temperature is between 2000°C and the pressure is 5MPa, the cerium oxide is slightly yellowish, slightly red, and pink. Its properties It is used to make polishing materials, catalysts, catalyst carriers (auxiliaries), ultraviolet absorbers , fuel cell electrolytes, automobile exhaust absorbers, electronic ceramics , etc.
