Iridium Oxide Recycling

Iridium oxide (IrO₂) is a compound formed by combining iridium metal and oxygen. It is a black or brown solid. It has very high chemical stability and remains stable even at high temperatures, in strong acids, and in strong oxidizing environments. Iridium oxide is widely used in high-tech fields such as catalysis, electrochemical reactions, and electrode materials. Especially in electrochemical applications such as chlorine-alkali electrolysis, water splitting reactions, and fuel cells, iridium oxide's excellent electrical conductivity and corrosion resistance make it an ideal catalytic material.

Common processes for producing iridium oxide:

1. High temperature oxidation method: This is the most common method for producing iridium oxide. First, iridium metal is heated to a high temperature (usually 500°C to 900°C) and oxidized in an oxygen atmosphere. Iridium metal reacts with oxygen to form iridium oxide. This method is often used to produce high-purity iridium oxide powder or granules. By controlling the temperature and time, the particle size and crystal structure of the iridium oxide product can be adjusted.

2. Wet chemical method: The wet chemical method is a process that uses chemical reactions to convert iridium into iridium oxide. A common wet method is to react iridium salts (such as iridium chloride or iridium chloride) with oxidizing agents (such as sodium hydroxide or sodium chloride) to produce iridium oxide at a suitable temperature. By adjusting the reaction conditions (such as temperature, pH value, reaction time, etc.), the crystal form and purity of iridium oxide can be controlled.

3. Sol-gel method: In this method, iridium precursors (such as iridium salts) are mixed with sol and gel reactants to form a sol of iridium. The sol is then converted into solid iridium oxide through a heating or drying process. This method can obtain a more uniform iridium oxide dispersion and allows for precise control of the particle size and structure of iridium oxide.

4. Electrochemical oxidation method: Through electrochemical reaction, an oxidation reaction is carried out in the electrolyte with iridium metal as the anode. Iridium metal is oxidized by the action of electric current to form an iridium oxide film, which is often used in the production of electrode materials. The advantage of this method is that the iridium oxide layer can be directly grown on the surface of iridium metal, making it suitable for high surface area electrocatalysis applications.

Waste iridium oxide is one of the raw materials for recycling iridium-containing precious metal catalysts. Other raw materials for recycling iridium-containing precious metal catalysts include recovery of iridium bromide, recovery of iridium chloride iridate, recovery of iridium acetate, recovery of iridium tetrachloride, recovery of iridium iodide, and recovery of ammonium chloride iridate. If you need to recycle iridium-containing precious metal catalyst waste, please contact our 24-hour service hotline. Dingfeng Precious Metals Recycling Refinery has its own recycling and refining plant, which does not use middlemen to make profits from price differences, and has a professional technical team and customer service staff to provide one-on-one service and ensure customer privacy during the recycling process.