| Abstract Scope |
High entropy alloy nanopowders, such as CrMnFeCoNi, AlCoCrFeNi, and IrRhRuCoNi, were synthesized from the metal oxides at low temperatures (550-850 °C) using a novel reducing agent of calcium hydride halide (Ca7H12Cl2) which was produced from CaH2 and molten LiCl. During the heating, the calcium species protected the aggregation of synthesized alloys, leading to the formation of nanopowders possessing high specific surface areas without a crushing process. It was verified that, due to the high surface areas, the obtained nanopowders exhibited superior catalytic performances in p-nitrophenol hydrogenation and liquid ammonia electrolysis. In the presentation, we will share superiority and versatility of the developed chemical synthesis approach of high entropy alloy nanopowders and catalyst applications of the obtained nanopowders. |