Synthesis of Fully Exposed Single‐Atom‐Layer Metal Clusters on 2D Ordered Mesoporous TiO<sub>2</sub> Nanosheets
Linlin Duan, Chin‐Te Hung, Jinxiu Wang, Changyao Wang, Bing Ma, Wei Zhang, Yuzhu Ma, Zaiwang Zhao, Chaochao Yang, Tiancong Zhao, Liang Peng, Di Liu, Dongyuan Zhao, Wei Li
Abstract
Abstract A sulfhydryl monomicelles interfacial assembly strategy is presented for the synthesis of fully exposed single‐atom‐layer Pt clusters on 2D mesoporous TiO 2 (SAL‐Pt@mTiO 2 ) 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@mTiO 2 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 mTiO 2 with high exposure and accessibility. When used as a catalyst for hydrogenation of 4‐nitrostyrene, the SAL‐Pt@mTiO 2 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).