催化作用
反应性(心理学)
氧化物
金属
材料科学
贵金属
Atom(片上系统)
水煤气变换反应
化学工程
纳米技术
化学
冶金
有机化学
嵌入式系统
替代医学
病理
工程类
医学
计算机科学
作者
Long Kuai,Li Liu,Qingmei Tao,Nan Ye,Erjie Kan,Na Sun,Shoujie Liu,Baoyou Geng
标识
DOI:10.1002/anie.202212338
摘要
The two-dimensional nanosheets are conducive to not only endow opened surfaces for loading active metal atoms but also boost the mass transfer for the heterogeneous reactions. The challenge is how to load and stabilize single-atoms on nanosheets in high-areal densities. This work reports an efficient micro-gas blasting (MGB) strategy to access versatile noble metal single-atoms/metal oxide nanosheets, including Ir1 /CoOx , Pd1 /CeO2 , etc. Especially for Pt/CeO2 nanosheets (Pt1 /CeO2 -S), the Pt loading is increased to 15 at%. The Pt1 /CeO2 -S catalysts from MGB are revealed to possess superior reactivity and tolerance in the model reaction of water-gas shift (WGS). The Pt1 /CeO2 -S catalyst exhibit 2-3 times reactivity that of their thicker counterpart, single-atom Pt1 /CeO2 microspheric catalyst. Moreover, the single-atom sites in Pt1 /CeO2 -S (1-10 %) catalysts are stable in a harsh WGS reaction condition of 10 % CO. This work thus paves a way to access the practical single-atom catalysts.
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