催化作用
纳米材料基催化剂
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化学
纳米技术
金属
纳米颗粒
材料科学
结晶学
化学工程
光化学
有机化学
计算机科学
工程类
嵌入式系统
作者
Shu Zhao,Chen Fang,Sibin Duan,Bin Shao,Tianbo Li,Huazhong Tang,Qiushi Lin,Junying Zhang,Lin Li,Jiahui Huang,Nicolas Bion,Wei Liu,Hui Sun,Aiqin Wang,Masatake Haruta,Botao Qiao,Jun Li,Jingyue Liu,Tao Zhang
标识
DOI:10.1038/s41467-019-11871-w
摘要
Abstract The interfacial sites of supported metal catalysts are often critical in determining their performance. Single-atom catalysts (SACs), with every atom contacted to the support, can maximize the number of interfacial sites. However, it is still an open question whether the single-atom sites possess similar catalytic properties to those of the interfacial sites of nanocatalysts. Herein, we report an active-site dependent catalytic performance on supported gold single atoms and nanoparticles (NPs), where CO oxidation on the single-atom sites is dramatically promoted by the presence of H 2 O whereas on NPs’ interfacial sites the promoting effect is much weaker. The remarkable H 2 O promoting effect makes the Au SAC two orders of magnitude more active than the commercial three-way catalyst. Theoretical studies reveal that the dramatic promoting effect of water on SACs originates from their unique local atomic structure and electronic properties that facilitate an efficient reaction channel of CO + OH.
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