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Tanaka Precious Metals succeeds in development of world's first platinum electrode able to produce ozone solution at 40 times existing efficiency

Friday, Apr 06, 2012

Tanaka Holdings Co., Ltd. (a company of Tanaka Precious Metals) today announced that Tanaka Kikinzoku Kogyo K.K., which operates the Tanaka Precious Metals' manufacturing business, had successfully developed a platinum electrode able to produce ozone solution widely used in applications such as sterilization and deodorizing at 40 times the efficiency of existing technology.

The newly-developed electrode is a platinum electrode can produce ozone at high efficiency through the electrolysis of water, and is able to produce 3.6ppm (parts per million) of ozone by performing electrolysis of water for 30 minutes under the low-current conditions of 0.1 amperes per square centimeter. Although conventional platinum electrodes faced the problem of low production efficiency because they produce 0.09ppm of ozone under the same conditions, by having to create a new platinum-based catalyst layer has enabled the realization of high production efficiency at 40 times existing levels in a world first.

As power consumption can be reduced by using these newly-developed electrodes as replacements in applications such as sterile water and rinse water currently utilizing electrolysis-based ozone production (electrolytic process), running costs are expected to be reduced to less than 1/10 of the current level. Furthermore, in applications such as wastewater treatment and semiconductor cleaning, a variety of production methods such as the electrical discharge method and the photochemical reaction method are used according to the requirements. By utilizing its high production efficiency, the production method using the newly-developed electrode is expected to replace a variety of ozone production methods on a practical level without lowering production efficiency.

The newly-developed electrode is an electrode incorporating a new catalyst layer made up of an alloy of titanium and platinum. When used as an anode, the electrode can increase the electric potential for producing oxygen through the electrolysis of water (higher oxygen overvoltage), and is able to efficiently produce cathode reactions that conflict with oxygen production reactions normally difficult to produce with ordinary electrodes. Titanium has a high oxygen overvoltage but an extremely short lifespan, and although platinum is characterized by having a long lifespan but with a low oxygen overvoltage. By making an alloy of titanium and platinum, which have opposite characteristics under optimal conditions, to create a new electrode catalyst boasting the strengths of both materials, Tanaka Kikinzoku Kogyo has successfully developed an electrode combining high oxygen overvoltage and a long lifespan(*1), which has not been possible until now.

Source: Tanaka Holdings Co.

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