In the realm of electrochemistry, electrochemical reactions involve the movement of the electrode surface region accompanied by heterogeneous catalytic reactions, similar to the phenomena observed in chemical catalysis. Referred to as electrocatalysis, this process encompasses the alteration of electrode reaction rates and types depending on the electrode substrate materials within a specific electrolyte, under equivalent overpotential conditions. The choice of appropriate electrode materials serves as an effective means to enhance the efficiency of electrochemical catalytic reactions, as different electrode materials can induce significant changes in the electrochemical reaction rate.
One notable application of the electrochemical method lies in the treatment of recalcitrant organic matter, wherein non-biodegradable organic compounds can be converted into biodegradable forms. Since the electrochemical conversion rate of organic compounds is generally slow, several strategies are employed to improve the process. These include increasing the electrode overpotential, enhancing the electrode surface area, selecting superior electrode materials, and improving the electrode structure.
Furthermore, research into multi-component electrodes is important in electrochemical reactions. For instance, the design of a Ti/SnO2·Sb2O3·MnO2/PbO2·MnO2 anode exemplifies the use of multi-component electrodes. The primary cause of titanium anode failure lies in the diffusion of nascent oxygen produced by the oxygen evolution reaction, leading to the formation of a non-conductive TiO2 film on the titanium surface. An active layer of PbO2MnO2 is applied to the electrode surface to activate the anode. Additionally, to reduce the diffusion of nascent oxygen to the titanium surface, an intermediate layer of SnO2·Sb2O3·MnO2 is introduced between the titanium electrode matrix and the active layer. This anode exhibits high electrocatalytic activity and electrochemical stability during the treatment of phenolic wastewater.
The titanium electrode serves as a critical component in water electrolysis machines, directly impacting the overall machine quality. The selection of electrodes depends on the specific nature of the work involved. In the field of water treatment, metal electrodes must meet several fundamental requirements:
Excellent electrical conductivity.
Strong corrosion resistance.
Robust mechanical strength and machining performance.
Longevity in operation.
Demonstrating good electrocatalytic performance.
Particularly in water treatment processes such as acid and alkali ionized water formation through water electrolysis, various potent oxidizing substances like O3, H2O2, and HCLO exist in the water. This necessitates the usage of specialized functional electrodes capable of withstanding such conditions. After extensive research, our company has developed a long-lasting electrode – the titanium-coated electrode – specifically designed for water treatment. This electrode consists of a pure titanium substrate coated with noble metal oxides from the platinum group. It exhibits high electrocatalytic performance, excellent oxidation resistance, and superior electrical conductivity.
The advantages of this anode are as follows:
1. Titanium possesses attributes such as lightweight, remarkable strength, corrosion resistance, and exceptional resistance to wet chlorine, surpassing other metal materials. For instance, when water electrolysis contains trace amounts of chloride, stainless steel plates are prone to pitting, resulting in shortened electrode lifespans. However, titanium does not encounter such issues.
2. The inclusion of various platinum group precious metals in the coating ensures high current efficiency, superior conductivity, excellent electrocatalytic performance, robust oxidation resistance, extended operational lifespan, and energy efficiency.
3. Demonstrates favorable polarity performance.
