2024-03-28T20:12:20Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/799282022-11-17T02:08:08Zhdl_2115_20059hdl_2115_151Electrostatic Stabilization of Single-Atom Catalysts by Ionic LiquidsDing, ShipengGuo, YalinHulsey, Max J.Zhang, BinAsakura, HiroyukiLiu, LingmeiHan, YuGao, MinHasegawa, Jun-yaQiao, BotaoZhang, TaoYan, Ning430In single-atom catalysts (SACs), the isolated metal atoms on solid support are often charged. Taking advantage of this common feature, we establish ionic liquid-stabilized single-atom catalysts (ILSSACs) employing electrostatic interaction as a general stabilization strategy. While Pt nanoparticles were formed on hydroxyapatite after reaction when unprotected, Pt remained atomically dispersed on ionic liquid-stabilized samples. Density functional theory calculations reveal that the activation energy for the transformation of two isolated Pt atoms to a Pt dimer increases remarkably from 0.11 to 0.72 eV with the protection of [Bmim][BF4]. The presence of ILs also tunes the electronic state of Pt-1, inducing an order-of-magnitude hydrogenation activity increase. The simple stabilization strategy is easily extended to SACs comprising various metal atom-support combinations. For instance, ILs significantly improved the stability and selectivity of a Pd-1 catalyst for the hydrogenation of acetylene, thus outperforming unprotected SACs.Cell PressJournal Articlehttp://hdl.handle.net/2115/799282451-9294Chem512320732192019-12-12enginfo:doi/10.1016/j.chempr.2019.10.007none