乙炔
煅烧
催化作用
硝基苯
材料科学
选择性
X射线吸收精细结构
化学工程
碳纳米管
水溶液
纳米颗粒
热稳定性
碳纤维
纳米技术
化学
有机化学
复合材料
工程类
物理
复合数
量子力学
光谱学
作者
Huan Li,Chaofa Xu,Xiaoliang Mu,Peng Zhang,Xian‐Ming Zhang,Nanfeng Zheng
出处
期刊:ChemNanoMat
[Wiley]
日期:2018-04-10
卷期号:4 (5): 518-523
被引量:6
标识
DOI:10.1002/cnma.201700370
摘要
Abstract We demonstrated that acetylene was a unique reducing agent for aqueous synthesis of ultrasmall Pt nanoparticles (NPs) supported on carbon nanotube (CNT) with high stability. Multiple techniques including X‐ray absorption fine structure (XAFS) were employed to fully characterize this Pt catalyst. The in‐situ generated olefins from acetylene closely wrapped the Pt NPs, and turned into a very thin carbon shell in the subsequent calcination step. The carbon shell not only endowed the Pt NPs with extraordinary thermal stability, but also significantly improved the catalytic selectivity in hydrogenation of halogenated nitrobenzene by eliminating the dehalogenation reaction. Also, the acetylene‐mediated preparation method is readily scalable due to its convenience and environmental friendliness.
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