催化作用
材料科学
吸附
原子单位
金属
原子层沉积
氧化物
化学工程
化学物理
纳米技术
物理化学
薄膜
化学
冶金
工程类
物理
量子力学
生物化学
作者
Jiawei Wan,Wenxing Chen,Chuanyi Jia,Lirong Zheng,Juncai Dong,Xusheng Zheng,Yu Wang,Wensheng Yan,Chen Chen,Qing Peng,Dingsheng Wang,Yadong Li
标识
DOI:10.1002/adma.201705369
摘要
Abstract Isolated single atomic site catalysts have attracted great interest due to their remarkable catalytic properties. Because of their high surface energy, single atoms are highly mobile and tend to form aggregate during synthetic and catalytic processes. Therefore, it is a significant challenge to fabricate isolated single atomic site catalysts with good stability. Herein, a gentle method to stabilize single atomic site metal by constructing defects on the surface of supports is presented. As a proof of concept, single atomic site Au supported on defective TiO 2 nanosheets is prepared and it is discovered that (1) the surface defects on TiO 2 nanosheets can effectively stabilize Au single atomic sites through forming the Ti–Au–Ti structure; and (2) the Ti–Au–Ti structure can also promote the catalytic properties through reducing the energy barrier and relieving the competitive adsorption on isolated Au atomic sites. It is believed that this work paves a way to design stable and active single atomic site catalysts on oxide supports.
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