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)...
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...
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...
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....
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-...
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 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 ...
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...
The crystal phase and microstructure were characterized by XRD, SEM, TEM and HRTEM. The microsphere/ nanosheets structures were found to be layered delta-MnO2 at 120 degrees C. The dual-phase core-shell structure with the core of delta-MnO2 microsphere/nanosheets and the shell of alpha-MnO2 ...