Synthesis of Fully Exposed Single‐Atom‐Layer Metal Clusters on 2D Ordered Mesoporous TiO2 Nanosheets. Issue 43 (14th September 2022)

• Record Type: Journal Article
• Authors: Duan, Linlin; Hung, Chin‐Te; Wang, Jinxiu; Wang, Changyao; Ma, Bing; Zhang, Wei; Ma, Yuzhu; Zhao, Zaiwang; Yang, Chaochao; Zhao, Tiancong; Peng, Liang; Liu, Di; Zhao, Dongyuan; Li, Wei
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 43(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-14
• Subjects: Mesoporous Materials -- Metal Clusters -- Selective Hydrogenation -- Single-Atom-Layer -- Two-Dimensional; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202211307
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A sulfhydryl monomicelles interfacial assembly strategy is presented for the synthesis of fully exposed single‐atom‐layer Pt clusters on 2D mesoporous TiO2 (SAL‐Pt@mTiO2 ) nanosheets. This synthesis features the introduction of the sulfhydryl group in monomicelles to finely realize the controllable co‐assembly process of Pt precursors within ordered mesostructures. The resultant SAL‐Pt@mTiO2 shows uniform SAL Pt clusters (≈1.2 nm) anchored in ultrathin 2D nanosheets (≈7 nm) with a high surface area (139 m 2 g −1 ), a large pore size (≈25 nm) and a high dispersion (≈99 %). Moreover, this strategy is universal for the synthesis of other SAL metal clusters (Pd and Au) on 2D mTiO2 with high exposure and accessibility. When used as a catalyst for hydrogenation of 4‐nitrostyrene, the SAL‐Pt@mTiO2 shows a high catalytic activity (TOF up to 2424 h −1 ), 100 % selectivity for 4‐aminostyrene, good stability, and anti‐resistance to thiourea poisoning under relatively mild conditions (25 °C, 10 bar). Abstract : Fully exposed single‐atom‐layer Pt clusters on 2D mesoporous TiO2 nanosheets have been synthesized by a universal sulfhydryl monomicelles interfacial assembly strategy. The resultant catalyst shows unique chemical state and nanostructures, enabling a high catalytic activity, selectivity, poison tolerance and stability for the hydrogenation of 4‐nitrostyrene.