期刊
NANO RESEARCH
卷 10, 期 9, 页码 2988-2997出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1509-3
关键词
atomic thickness; two-dimensional (2D) nanosheets; non-noble-metal alloy; atomic dispersion; catalysis
类别
资金
- National Natural Science Foundation of China
- National Key Research and Development Program of China [2016YFF0204402]
- Program for Changjiang Scholars and Innovative Research Team in the University
- Fundamental Research Funds for the Central Universities
- Long Term Subsidy Mechanism from the Ministry of Finance
- Ministry of Education of PRC
Layered double hydroxides (LDHs) have been widely used as catalysts owing to their tunable structure and atomic dispersion of high-valence metal ions; however, limited tunability of electronic structure and valence states have hindered further improvement in their catalytic performance. Herein, we reduced ultrathin LDH precursors in situ and topotactically converted them to atomically thick (similar to 2 nm) two-dimensional (2D) multi-metallic, single crystalline alloy nanosheets with highly tunable metallic compositions. The as-obtained alloy nanosheets not only maintained the vertically aligned ultrathin 2D structure, but also inherited the atomic dispersion of the minor metallic compositions of the LDH precursors, even though the atomic percentage was higher than 20%, which is far beyond the reported percentages for single-atom dispersions (usually less than 0.1%). Besides, surface engineering of the alloy nanosheets can finely tune the surface electronic structure for catalytic applications. Such in situ topotactic conversion strategy has introduced a novel approach for atomically dispersed alloy nanostructures and reinforced the synthetic methodology for ultrathin 2D metal-based catalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据