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Defect Effects on TiO 2 Nanosheets: Stabilizing Single Atomic Site Au and Promoting Catalytic Properties
Author(s) -
Wan Jiawei,
Chen Wenxing,
Jia Chuanyi,
Zheng Lirong,
Dong Juncai,
Zheng Xusheng,
Wang Yu,
Yan Wensheng,
Chen Chen,
Peng Qing,
Wang Dingsheng,
Li Yadong
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201705369
Subject(s) - catalysis , materials science , nanotechnology , adsorption , metal , atomic units , oxide , atomic layer deposition , chemical engineering , chemical physics , chemistry , thin film , metallurgy , physics , quantum mechanics , engineering , biochemistry
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.