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Electrostatic Stabilization of Single-Atom Catalysts by Ionic Liquids

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Title: Electrostatic Stabilization of Single-Atom Catalysts by Ionic Liquids
Authors: Ding, Shipeng Browse this author
Guo, Yalin Browse this author
Hulsey, Max J. Browse this author
Zhang, Bin Browse this author
Asakura, Hiroyuki Browse this author
Liu, Lingmei Browse this author
Han, Yu Browse this author
Gao, Min Browse this author
Hasegawa, Jun-ya Browse this author →KAKEN DB
Qiao, Botao Browse this author
Zhang, Tao Browse this author
Yan, Ning Browse this author
Issue Date: 12-Dec-2019
Publisher: Cell Press
Journal Title: Chem
Volume: 5
Issue: 12
Start Page: 3207
End Page: 3219
Publisher DOI: 10.1016/j.chempr.2019.10.007
Abstract: In 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.
Type: article
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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