Synthesis of Fully Exposed Single-Atom-Layer Metal Clusters on 2D Ordered Mesoporous TiO2 Nanosheets.
Angew Chem Int Ed Engl
; 61(43): e202211307, 2022 Oct 24.
Article
em En
| MEDLINE
| ID: mdl-36037030
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 (≈1.2â
nm) anchored in ultrathin 2D nanosheets (≈7â
nm) with a high surface area (139â
m2 g-1 ), a large pore size (≈25â
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 2424â
h-1 ), 100 % selectivity for 4-aminostyrene, good stability, and anti-resistance to thiourea poisoning under relatively mild conditions (25 °C, 10â
bar).
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article