Platinum is widely used in electroplating, electrolytic synthesis, electrochemical treatment of wastewater and fuel cells. Platinum electrodes have the characteristics of strong corrosion resistance, high catalytic activity, high oxygen evolution potential, and low hydrogen evolution potential. They are both excellent in performance. The anode material is also a cathode material with excellent performance. Except for a few mixed acids, platinum exhibits excellent corrosion resistance in hydrochloric acid, nitric acid, sulfuric acid, hydrofluoric acid, phosphoric acid and most electrolyte solutions. Many important electrochemical industries, such as hydrogen peroxide, ammonium persulfate, electrolyzed water, etc., can be used as anode materials. However, platinum resources are scarce and expensive. In particular, the area of electrode materials used in industry is large. It is not feasible to directly use pure platinum anodes in production, which restricts the popularization and application of platinum electrodes in the electrochemical industry. In order to save electrode costs and platinum resources, it is necessary to use titanium-based platinum anodes to replace pure platinum anodes.

Our company has developed a platinum coating technology, which has the advantages of low cost, simple manufacturing process, and good bonding force. The conductivity and enhanced life of sintered platinum electrodes are better than imported platinum-plated titanium electrodes. Experiments show that the electrolysis effect is better than the ruthenium-iridium coating, and alkaline ionized water with pH=9.5 or higher can be obtained, and acidic ionized water with orp above -250mv and pH=3-4 can be obtained.

1. Application field: ionized water machine, acidic oxidation potential water

2. Product specifications: processing according to drawings

3. Current density: <500A/m2

4. Working principle: The ionized water generator uses the principle of water electrolysis and the selective permeability of the cation exchange membrane to cations. Under the action of a direct current electric field, a cation exchange membrane is added between the positive and negative electrodes to form a two-chamber electrolytic cell. When the water flows through, a higher concentration of hydroxide ions is generated at the cathode of the electrolytic cell, and hydrogen is released at the same time, making the water appear weakly alkaline. Since the electrode reaction is a reduction reaction, the solution system is in a reduced state, and the oxidation-reduction potential (ORP) of the obtained alkaline ionized water is negative. A higher concentration of hydrogen ions are generated at the anode to release oxygen. At the same time, the water contains a small amount of chloride, which loses electrons and generates chlorine gas, so that the water is rich in hydrogen ions and a small amount of chloride. The electrode reaction is an oxidation reaction, and the obtained acidic ionized water is in an oxidized state, and the oxidation-reduction potential (ORP) is a positive value.

5. Electrochemical performance and life test

Ionized water industry standard is alkaline reduced water pH value of 7.5-10, ORP≤-250mV, the higher the pH value in the standard range, the better, the lower the ORP, the stronger the reducibility, and the better the water quality. The pH value of acidic reduced water is 2.5-6.5, ORP≥300mV, the lower the pH value is within the standard range, the better, the higher the ORP, the stronger the reducibility, and the better the water quality. It can be seen from the table that the quality of the ionized water produced by the developed Pt/Ti electrode fully meets the standards of the ionized water industry, and the quality of the ionized water produced by the Pt/Ti electrode is better than that produced by the titanium-based MMO electrode.