Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , China.
National Laboratory of Mineral Materials, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology , China University of Geosciences , Beijing 100083 , China.
ACS Appl Mater Interfaces. 2018 Oct 10;10(40):34068-34076. doi: 10.1021/acsami.8b06292. Epub 2018 Sep 25.
Porous nanostructures with a yolk-shell complex interior will provide lots of virtues to construct advanced catalysts. In our work, the preparation of novel yolk-shell Au nanocrystal-loaded CoO nanocages (CoO/Au heterostructure) from a metal-organic framework-derived composite was reported. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis, and so forth were used to analyze the morphology, structure, and composition of the heterostructures. Most importantly, CoO/Au heterostructures are a kind of low-cost, good performance catalysts for the oxygen reduction reaction to replace the noble-Pt catalysts. The high surface area of the porous structure and the excellent electron transfer properties of well-dispersed Au nanocrystals and also the electronic coupling effect between CoO and Au in the composites are attributed to the good performance.
具有蛋黄壳复合内部的多孔纳米结构将为构建先进的催化剂提供许多优点。在我们的工作中，报道了一种新型的核壳 Au 纳米晶负载 CoO 纳米笼（CoO/Au 异质结构）的制备方法，该方法来自金属有机骨架衍生的复合材料。使用扫描电子显微镜、能谱、透射电子显微镜、X 射线衍射、X 射线光电子能谱、BET 分析等手段对异质结构的形貌、结构和组成进行了分析。最重要的是，CoO/Au 异质结构是一种低成本、高性能的氧还原反应催化剂，可以替代贵金属 Pt 催化剂。多孔结构的高表面积和分散良好的 Au 纳米晶体的优异电子转移性能，以及复合材料中 CoO 和 Au 之间的电子耦合效应，是其性能良好的原因。
