期刊
SMALL
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202303946
关键词
iron manganese compounds; oxygen evolution reaction; Prussian blue analogs; room temperature mosaic structures; supercapacitors
This paper synthesized a manganese-iron Prussian blue with a hexagonal concave amorphous structure, which has non-gold-bonded adsorption and highly active metal centers, leading to superior performance in supercapacitors.
The key to increasing the rate of oxygen evolution reaction (OER) lies in accelerated four-electron dynamics, while the key to facilitating the development of supercapacitors lies in the design of electrode materials. This paper synthesized manganese-iron Prussian blue (MnFe-PBA@IF) at room temperature, and hexagonal concave structures w ere prepared using a fast-reducing matrix. Interestingly, MnFe-PBA@IF has an amorphous structure favorable to exposing more active surfaces. According to Gibbs free energy calculations on MnFe-PBA, charge depletion of manganese atoms can greatly enhance the adsorption of electron-rich oxygen-containing groups on the surface. Furthermore, the overpotential in 1 m KOH is 280 mV. Also, it can be used as a supercapacitor with a stable operating voltage range of -0.9-0 V and a specific capacity of 1260 F g-1. This work provides new insights into the synthesis of OER catalysts for Prussian blue ferromanganese at room temperature. Non-gold-bonded adsorption, highly active metal centers and active surfaces are the underlying reasons for the superior performance of supercapacitors. Therefore, Prussian blue with good energy storage performance and high active surface can be used as multifunctional energy storage and conversion electrodes. MnFe-PBA@IF is synthesized at room temperature as a hexagonal concave amorphous structure. The synthesized amorphous Prussian blue with high oxygen precipitation reaction has non-gold bonded adsorption and highly reactive metal centers as well as active surfaces, which is fundamental to the superior performance of supercapacitors.image
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