Solventless synthesis of iridium(0) nanoparticles
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In this article, we present the results of a solvent-free synthesis of iridium(0) nanoparticles, both water washed and unwashed. IrCl3 and NaBH4, as starting materials, are mixed using an agate mortar and milled for 15 min until a black powder is obtained, which is heated in a nitrogen-controlled atmosphere oven at 200 °C for 2 h. If the product of the reaction is not washed before heating, NaBH4 and IrO2 impurities are observed. On the other hand, if the reaction product is washed before the heating, the obtained powder is free of impurities. We study the effect of the variation in reducing agent concentration and the annealing temperature used after the reaction. In all cases, the calculated particle size is less than 10 nm.
KeywordsIr(0) nanoparticles Mechanosynthesis Solventless synthesis Aerobic synthesis
Prof. Rocío Redón acknowledges the PAPIIT (IN101308) and CONACyT 104099 projects for the financial support.
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