The X-ray diffraction (XRD) and Raman spectroscopy are used to confirm the physical structure, whilst cyclic voltammetry and galvanostatic charge-discharge measurements are performed to investigate the electrochemical performances. Encouragingly, delta-MnO2 film delivers a high specific capacitance (C (s)...
In this work, a hydrothermal method has been exploited to synthesize porous delta-MnO2 nanosheets. The influence of hydrothermal temperature on the synthesis of delta-MnO2 has been investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), N-2 adsorption-desorption isotherms...
The structure and morphology of these materials were analyzed by SEM, HRTEM, XRD, and XPS, while their electrochemical properties were tested in the 1 M Na2SO4 aqueous electrolyte by cyclic voltammetry, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy. The specific...
Furthermore, a storage mechanism of H+/Zn2+ co-insertion accompanied by the deposition of zinc sulfate hydroxide hydrate is clarified by the aid of ex-situ XRD and SEM technologies. This work provides a new pathway for developing high capacity and long lifespan ZIBs....
delta-MnO2 nanoparticles synthesized in a polyol medium have been characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and Fourier transformed infrared spectroscopy(FT-IR). The electrochemical properties of the prepared material ...
The as-prepared catalysts were characterized by XRD, N-2 sorption, SEM, TEM, XPS, H-2-TPR, O-2-TPD and so on. Compared with the referenced epsilon-MnO2 and gamma-MnO2, the higher catalytic activity of layered delta-MnO2 was ascribed to its higher specific surface area, stronger low-...
The microstructure and chemical composition of as-prepared samples were characterized by a series of means, such as XRD, SEM, TEM, HRTEM, XPS and BET. The morphology of alpha-MnO2, delta-MnO2 and 3D-MnO2 were 3D star-like nanowires, tremella-like nanosheets and 3D snowflake-like ...
Both of the MnO2 samples were characterized by means of XRD, Raman, FESEM, TEM, BET, XPS and H-2-TPR techniques. Owning to its more abundant surface adsorbed oxygen species, stronger reducibility, larger specific surface area and lower Mn-O bond strength, the alpha-MnO2 nanowires showed ...
GN-MnO2 was characterized using Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), N-2 adsorption/desorption (BET) and Boehm's titration method. Under static conditions, the effect of parameters like pH level, initial ...
The successful synthesis of the hybrid material was studied by XRD, Raman, BET, FESEM with EDX, FTIR and TEM analyses. An efficient N-alkylation reaction of substituted aromatic amines with aromatic alcohols was carried out under solvent-free aerobic conditions in the presence of catalytic amount...