Electrical world

The Center for Nanoparticle Research at the Institute for Basic Science (IBS) has proposed a new method to enhance fuel cell efficiency with the simultaneous removal of toxic heavy metal ions.

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The electro-oxidation measurements clearly s

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Lead

The direct methanol fuel cell (DFMC) has been a promising energy conversion device for electrical vehicles and portable devices. However, the inevitable Carbon monoxide (CO) poisoning is one of the main factors reducing its performance. Furthermore, the hexavalent chromium (Cr (VI)) also present, is a harmfully toxic, carcinogenic heavy metal in the aquatic environment.

The research team applied the Cr (VI) as a type of “CO scavenger” to the DMFC. Their new method not only uses the redox process to clean the platinum electrode surface by transforming CO into CO2 , but also allows for the Cr (VI) to convert into Cr (III), which is a much less toxic oxidation state and even a micronutrient. As a result, the potential maintained a nearly constant value of up to 10 hours and the presence of Cr (VI) was completely absent. Moreover, it enhances the maximum power density by 20% at 70?.

“Fuel cells have presented obstacles such as low performance and CO poisoning which have prevented them from becoming possible, next generation energy sources until now,” explains Professor Yung-Eun Sung, both a group leader of the Center for Nanoparticle Research at IBS and the professor of the School of Chemical and Biological Engineering at the Seoul National University. “This new hybrid fuel cell technology is expected to propel the deployment of direct methanol fuel cells.”

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The above story is based on materials provided by Institute for Basic Science. Note: Materials may be edited for content and length.

MCB (Miniature Circuit Breaker) is a safety circuit which is equipped with a safety thermal (bimetal) for the safety and well equipped overload relays electromagnetic short circuit for safety. MCB widely used for a safety circuit one phase and three phase. Profit using MCB, namely:

Can be decided despite a series of three phase circuit short on one line.

Can be reused after a series of repair due to circuit short or overload.

Having a good response in case of short circuit or more expense.

At MCB, there are two types of safety, namely the thermal and electromagnetic, therma protection function to secure the flow of Overload safety while working for the electromagnetic safeguard in case of short circuit. MCB has a thermal safety on the same principle with the thermal overload that is using two metals that are incorporated (Bimetal), the thermal protection has a delay, this depends on the size of flows that must be secured, while Electromagnetic safety using a coil that can attract an armature of soft iron. MCB has made only one pole for one phase of safety, whereas for the safety of three phase usually has three poles with a lever that put together, so that if an interruption occurs at one pole then the other pole which will also be disconnected.:lol: