1. A 'copolymer-co-morphology' conception for shape-controlled synthesis of Prussian blue analogues and as-derived spinel oxides
- Author
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Kaiyue Zhu, Weishen Yang, D. L. Nagy, M.A. Ahmed, Junhu Wang, Luhua Jiang, Alexandre I. Rykov, Gongquan Sun, Csilla Bogdán, Xuning Li, and Yuan Lizhi
- Subjects
chemistry.chemical_classification ,Prussian blue ,Materials science ,Spinel ,Nanotechnology ,02 engineering and technology ,Polymer ,Thermal treatment ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,0104 chemical sciences ,Nanomaterials ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Mössbauer spectroscopy ,Copolymer ,engineering ,General Materials Science ,0210 nano-technology - Abstract
The morphologically and compositionally controlled synthesis of coordination polymers and spinel oxides is highly desirable for realizing new advanced nanomaterial functionalities. Here we develop a novel and scalable strategy, containing a "copolymer-co-morphology" conception, to shape-controlled synthesis of various types of Prussian blue analogues (PBAs). Three series of PBAs MyFe1-y[Co(CN)6]0.67·nH2O (MyFe1-y-Co, M = Co, Mn and Zn) with well-controlled morphology have been successfully prepared through this strategy. Using MnyFe1-y-Co PBAs as the model, by increasing the relative content of Mn, flexible modulation of the morphology could be easily realized. In addition, a series of porous MnxFe1.8-xCo1.2O4 nano-dices with well-inherited morphologies and defined cation distribution could be obtained through a simple thermal treatment of the PBAs. All these results demonstrate the good universality of this novel strategy. When evaluated as an electrocatalyst, the octahedral-site Mn(III)/Mn(IV) content in MnxFe1.8-xCo1.2O4, mainly determined by sensitive (57)Fe Mössbauer in combination with X-ray photoelectron spectroscopic techniques, was discovered to be directly correlated with the oxygen reduction/evolution reaction (ORR/OER) activity.
- Published
- 2016