Disordered-ordered structure transition in co-sputtered solid solution nanoparticles and its impact on catalytic properties

用共溅射法制备了不同成分的AgPt双金属。使用包括液体聚乙二醇、固体基底和透射电子显微镜（TEM）网格的基底。研究了等摩尔AgPt合金的溅射条件。组织和成分分析证实了固溶体合金的形成。此外，还制备了三金属合金纳米粒子（AgPtCu），并对三、双金属合金纳米粒子和溅射Pt纳米粒子在氧还原反应（ORR）中的催化性能进行了评价。发现AgPt优于其他。这种改善被认为是由于AgPt的稳定结构和AgPt合金的形成。

Bimetallic AgPt with various compositions were prepared by cosputter deposition. Substrates including liquid polyethylene glycol, solid substrate, and transmission electron microscope (TEM) grids were used. The sputter conditions were studied to obtain equimolar AgPt alloy. The structure and composition analysis confirmed the formation of solid solution alloy. Besides, trimetal alloy nanoparticles (AgPtCu) were synthesized.The catalytic performance in oxygen reduction reaction (ORR) were evaluated for tri- and bi-metal alloy nanoparticles and sputtered Pt nanoparticles. AgPt was found to outperform others. The improvement was thought to arise from the stable structure of AgPt and the formation of AgPt alloy.