Defect Effects on TiO2 Nanosheets: Stabilizing Single Atomic Site Au and Promoting Catalytic Properties

Advanced Materials - Tập 30 Số 11 - 2018
Jiawei Wan1, Wenxing Chen1, Chuanyi Jia2, Lirong Zheng3, Juncai Dong3, Xusheng Zheng4, Yu Wang5, Wensheng Yan4, Chen Chen1, Qing Peng1, Dingsheng Wang1, Yadong Li1
1Department of Chemistry, Tsinghua University, Beijing 100084, China
2Guizhou Provincial Key Laboratory of Computational Nano-material Science, Institute of Applied Physics, Guizhou Education University, Guiyang, 550018 China
3Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
4National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
5Shanghai Synchrontron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204 China

Tóm tắt

AbstractIsolated 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 TiO2 nanosheets is prepared and it is discovered that (1) the surface defects on TiO2 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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Advanced Materials

Tập 30 Số 11

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