Transformer decoupling of signal source and amplifier input. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Transformer isolation of signal source and amplifier input

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Encyclopedia of radio electronics and electrical engineering / Transistor power amplifiers

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Transformer isolation of signal source and amplifier input

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Platinum atoms oxidize carbon monoxide at room temperature 09.03.2018

American scientists have created a new type of catalyst based on platinum atoms, which are distributed on a special substrate of monovalent copper oxide. It has been established that this catalyst is able to oxidize CO to CO2 already at room temperature.

To increase the efficiency of auto engines, engineers are trying to reduce their energy losses, as well as the temperature at which they operate. This led to the fact that the catalysts do not cope with the necessary tasks of carbon monoxide oxidation, which led to the need to develop other effective catalysts based on other materials operating at temperatures of 200 degrees Celsius and below.

Thus, a new catalyst developed by American chemists from Tufts University copes well with the task, oxidizing carbon monoxide to carbon dioxide already at room temperature. The maximum effect of 33% was achieved at a temperature of 70 degrees Celsius. The effectiveness of this development is based on the ability to form vacant sites near platinum atoms in the oxygen oxide structure.

Despite the fact that the proposed version of the catalyst can hardly be used in industrial sectors, it can be taken as a basis for the development of other materials. And the recovered atmospheric carbon dioxide released during a chemical reaction can be used as a fuel.

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