2019年12月
Electrostatic Stabilization of Single-Atom Catalysts by Ionic Liquids
CHEM
- 巻
- 5
- 号
- 12
- 開始ページ
- 3207
- 終了ページ
- 3219
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.chempr.2019.10.007
- 出版者・発行元
- CELL PRESS
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.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.chempr.2019.10.007
- ISSN : 2451-9294
- ORCIDのPut Code : 64620491
- Web of Science ID : WOS:000502574000017