催化作用
钴
铜
普鲁士蓝
材料科学
金属
碳纤维
化学工程
多孔性
氮气
纳米颗粒
金属有机骨架
无机化学
化学
纳米技术
冶金
复合数
有机化学
复合材料
电化学
电极
物理化学
吸附
工程类
作者
Hui Li,Fan Yue,Chao Yang,Peng Xue,Nannan Li,Yi Zhang,Jide Wang
出处
期刊:CrystEngComm
[The Royal Society of Chemistry]
日期:2016-11-21
卷期号:19 (1): 64-71
被引量:35
摘要
We present here the structural evolution of a Prussian blue analogue CuII3[CoIII(CN)6]2 (Cu–Co PBA) controlled by sodium citrate as a function of time at room temperature. We identified the different stages of Cu–Co PBA formation and elucidated its transformation kinetics. Moreover, 3D hybrid composites of nitrogen-doped porous carbon cubes, with cobalt and copper nanoparticles embedded within the well-graphitized shells, were rationally fabricated using Cu–Co PBA as the single precursor. The resulting Cu/Co@NPCC catalysts showed superior catalytic activity in the reduction of 4-nitrophenol to 4-aminophenol. Metallic cobalt and copper cores were leached out by FeCl3 and HCl treatment to determine the catalytically active sites. Results showed that the nitrogen-doped porous carbon still exhibited excellent catalytic performance after the metallic cores were removed. Based on the experimental results, we speculate that the unique structure of metal residues encapsulated inside the graphitic carbon layers may have higher catalytic activity than the metal particles themselves.
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