In situ synthesis of chemically ordered primitive cubic Pt3Co nanoparticles by a spray paint drying method for hydrogen evolution reaction

A facile two-step method is developed for large-scale synthesis of chemically ordered Pt 3 Co nanoparticles (NPs) as a high-performance catalyst for hydrogen evolution reaction. Due to the NaCl-matrix as dispersing media avoids the severe aggregation during the high-temperature annealing process, the resulting Pt 3 Co NPs are pure and well crystallized with narrow size distribution. Furthermore, the chemically ordered Pt 3 Co NPs exhibit excellent HER property in acidic solution. Our methodology can be also applied to synthesis of other Pt-based NPs.