Han Gao-Feng, Li Feng, Rykov Alexandre I, Im Yoon-Kwang, Yu Soo-Young, Jeon Jong-Pil, Kim Seok-Jin, Zhou Wenhui, Ge Rile, Ao Zhimin, Shin Tae Joo, Wang Junhu, Jeong Hu Young, Baek Jong-Beom
School of Energy and Chemical Engineering/Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea.
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, P. R. China.
Nat Nanotechnol. 2022 Apr;17(4):403-407. doi: 10.1038/s41565-022-01075-7. Epub 2022 Feb 10.
Single-atom catalysts have recently attracted considerable attention because of their highly efficient metal utilization and unique properties. Finding a green, facile method to synthesize them is key to their widespread commercialization. Here we show that single-atom catalysts (including iron, cobalt, nickel and copper) can be prepared via a top-down abrasion method, in which the bulk metal is directly atomized onto different supports, such as carbon frameworks, oxides and nitrides. The level of metal loading can be easily tuned by changing the abrasion rate. No synthetic chemicals, solvents or even water were used in the process and no by-products or waste were generated. The underlying reaction mechanism involves the mechanochemical force in situ generating defects on the supports, then trapping and stably sequestering atomized metals.
单原子催化剂因其高效的金属利用率和独特的性质，近年来备受关注。找到一种绿色、简便的合成方法是其广泛商业化的关键。在此我们表明，单原子催化剂（包括铁、钴、镍和铜）可通过一种自上而下的研磨方法制备，即将块状金属直接雾化到不同的载体上，如碳骨架、氧化物和氮化物。通过改变研磨速率，可以轻松调节金属负载量。该过程不使用合成化学品、溶剂甚至水，也不产生副产物或废物。潜在的反应机理涉及机械化学力在载体上原位产生缺陷，然后捕获并稳定隔离雾化的金属。
