Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300072, China.
Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China.
Angew Chem Int Ed Engl. 2016 Jul 25;55(31):9055-9. doi: 10.1002/anie.201603197. Epub 2016 May 30.
The development of a general strategy for synthesizing hierarchical porous transition-metal oxide and chalcogenide mesoporous nanotubes, is still highly challenging. Herein we present a facile self-template strategy to synthesize Co3 O4 mesoporous nanotubes with outstanding performances in both the electrocatalytic oxygen-evolution reaction (OER) and Li-ion battery via the thermal-oxidation-induced transformation of cheap and easily-prepared Co-Asp(cobalt-aspartic acid) nanowires. The initially formed thin layers on the precursor surfaces, oxygen-induced outward diffusion of interior precursors, the gas release of organic oxidation, and subsequent Kirkendall effect are important for the appearance of the mesoporous nanotubes. This self-template strategy of low-cost precursors is found to be a versatile method to prepare other functional mesoporous nanotubes of transition-metal oxides and chalcogenides, such as NiO, NiCo2 O4 , Mn5 O8 , CoS2 and CoSe2 .
开发一种通用的策略来合成具有层次多孔过渡金属氧化物和硫属化物介孔纳米管仍然极具挑战性。在此，我们提出了一种简便的自模板策略，通过廉价且易于制备的 Co-Asp（钴-天冬氨酸）纳米线的热氧化诱导转化，合成了具有出色电催化氧气析出反应（OER）和锂离子电池性能的 Co3 O4 介孔纳米管。在先驱体表面上最初形成的薄层层、氧诱导的内部先驱体的外向扩散、有机氧化的气体释放以及随后的 Kirkendall 效应对于介孔纳米管的出现非常重要。这种低成本前体的自模板策略被发现是一种通用的方法，可以制备其他功能的过渡金属氧化物和硫属化物的介孔纳米管，如 NiO、NiCo2 O4 、Mn5 O8 、CoS2 和 CoSe2 。
