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суббота, 31 марта 2018 г.

Nickel in the X-ray limelightMaking chemicals for industrial…


Nickel in the X-ray limelight



Making chemicals for industrial processes often requires scientists to use a catalyst—a substance that speeds up a chemical reaction, reducing the amount of energy it takes to make different products.


Scientists have long considered palladium, a precious metal closely related to platinum, a star catalyst because of its highly active nature. However, because palladium is so expensive, scientists have been looking for ways to substitute another metal for the majority of the palladium involved in certain catalysts.


In a new study from the U.S. Department of Energy’s (DOE) Argonne National Laboratory and the University of California at Santa Barbara, scientists have identified another elemental actor that helps activate palladium while reducing the amount of the precious metal needed for reactions to occur.


By combining a smaller amount of palladium with nickel on an iron nanoparticle formation, a research team led by Argonne chemist Max Delferro and his colleague Bruce Lipshutz, a chemistry professor at the University of California-Santa Barbara, designed an inexpensive and efficient system that reduced nitro-aryl groups to amines, a chemical group important in agricultural chemicals and the pharmaceutical industry.



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