Facile Synthesis of Single Iron Atoms over MoS 2 Nanosheets via Spontaneous Reduction for Highly Efficient Selective Oxidation of Alcohols.
Zhijun LiHonghong LiZening YangXiaowen LuSiqi JiMingyang ZhangJ Hugh HortonHonghe DingQian XuJunfa ZhuJin YuPublished in: Small (Weinheim an der Bergstrasse, Germany) (2022)
The facile creation of high-performance single-atom catalysts (SACs) is intriguing in heterogeneous catalysis, especially on 2D transition-metal dichalcogenides. An efficient spontaneous reduction approach to access atomically dispersed iron atoms supported over defect-containing MoS 2 nanosheets is herein reported. Advanced characterization methods demonstrate that the isolated iron atoms situate atop of molybdenum atoms and coordinate with three neighboring sulfur atoms. This Fe SAC delivers exceptional catalytic efficiency (1 atm O 2 @ 120 °C) in the selective oxidation of benzyl alcohol to benzaldehyde, with 99% selectivity under almost 100% conversion. The turnover frequency is calculated to be as high as 2105 h -1 . Moreover, it shows admirable recyclability, storage stability, and substrate tolerance. Density functional theory calculations reveal that the high catalytic activity stems from the optimized electronic structure of single iron atoms over the MoS 2 support.
Keyphrases
- highly efficient
- transition metal
- density functional theory
- visible light
- molecular dynamics
- quantum dots
- reduced graphene oxide
- iron deficiency
- metal organic framework
- genome wide
- gene expression
- room temperature
- dna damage response
- bone mineral density
- single cell
- oxidative stress
- molecular dynamics simulations
- soft tissue
- amino acid