Producing hollow platinum or platinum alloy catalyst useful in fuel cell, comprises e.g. forming many core-metal nanoparticles with low melting point in solvent, and depositing platinum or platinum alloy onto metal nanoparticle

摘要

Producing hollow platinum or platinum alloy catalyst, comprises forming many core-metal nanoparticles with low melting point in an oxygen free non-aqueous solvent, depositing platinum or platinum alloy onto the metal nanoparticles with low melting point to form a covering made of platinum or platinum alloy, which coats the core-metal nanoparticle, and removing the metal nanoparticles with low melting point from the particles, which are coated with the platinum or platinum alloy, to form many hollow particles of platinum or platinum alloy. Producing hollow platinum or platinum alloy catalyst, comprises forming many core-metal nanoparticles with low melting point in a non-aqueous solvent free of oxygen, depositing platinum or platinum alloy onto the metal nanoparticles with low melting point to form a covering made of platinum or platinum alloy, which coats the core-metal nanoparticle, and removing the metal nanoparticles with low melting point from the particles, which are coated with the platinum or platinum alloy, to form many hollow particles of platinum or platinum. An ionic liquid is used as a medium at room temperature, when platinum or platinum alloy is deposited on the core metal nanoparticles or the metal nanoparticle core with low melting point is melted or the covering is annealed to improve their catalytic activity.