According to news from the China Science Journal, international scientific teams including scientists from China, the United States, and Italy have developed ultra-fine platinum nanowire catalysts with serrated surfaces, which has greatly increased the surface activity and specific surface area of ​​fuel cell catalysts, and catalyzed their overall catalysis. Increased activity by more than 50 times.

It is reported that the results will significantly reduce the cost of fuel cells, has broad application prospects, and has similar implications for similar nano-catalysts.

Micro-electric motor brush life expectancy shorter than the large-scale electrical machinery, but the use of household appliances is shorter, therefore, a group generally can use the brush a few years in the life of electrical brush need to be replaced during the examples of many . 

Material from the brush of a general can select a low friction coefficient and contact voltage drop of larger graphite electric brush, resin binder for the high resistance of natural graphite brush can be used for the poor motor. In addition, more abrasive strong carbon-graphite brush is mainly used mica sudden ultra-small motor.

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