A Rapid Synthesis of Mesoporous Mn2O3 Nanoparticles for Supercapacitor Applications

Abstract

Mn2O3 nanomaterials have been recently composing a variety of electrochemical systems like fuel cells, supercapacitors, etc., due to their high specific capacitance, low cost, abundance and environmentally benign nature. In this work, mesoporous Mn2O3 nanoparticles (NPs) were synthesized by manganese acetate, citric acid and sodium hydroxide through a hydrothermal process at 150 °C for 3 h. The synthesized mesoporous Mn2O3 NPs were thoroughly characterized in terms of their morphology, surfaces, as well as their crystalline, electrochemical and electrochemical properties. For supercapacitor applications, the synthesized mesoporous Mn2O3 NP-based electrode accomplished an excellent specific capacitance (Csp) of 460 F·g−1 at 10 mV·s−1 with a good electrocatalytic activity by observing good electrochemical properties in a 6 M KOH electrolyte. The excellent Csp might be explained by the improvement of the surface area, porous surface and uniformity, which might favor the generation of large active sites and a fast ionic transport over the good electrocatalytic surface of the Mn2O3 electrode. The fabricated supercapacitors exhibited a good cycling stability after 5000 cycles by maintaining ~83% of Csp.

A novel one-step synthesis of Ce/Mn/Fe mixed metal oxide nanocomposites for oxidative removal of hydrogen sulfide at room temperature

“…5e ). 32 The HRXPS N 1s showed a negligible presence of nitrogen on the surface of mixed metal oxides ( Fig. 5f ).…”

Aerosol-assisted facile fabrication of bimetallic Cr2O3–Mn2O3 thin films for photoelectrochemical water splitting

“…It is observed in the present work that spin–orbit splitting (11.8 eV) is nearly the same value as reported for the energy difference between Mn 2p 3/2 and Mn 2p 1/2 of Mn 2 O 3 (the chemical oxidation state of Mn is 3+). 34,35 Furthermore, the asymmetric contours at a binding energy value of 530.1 eV in the O 1s high-resolution spectrum (Fig. 3d) is a characteristic feature of O 2− in the lattice of the metal oxides.…”

Mesoporous Metal Oxide Films

“…A facile hydrothermal process was also used by Son et al [9] in order this time to synthesize well-crystalline mesoporous Mn 2 O 3 materials for the fabrication of a pseudocapacitor. These materials exhibited a high surface area and uniformity of unique mesoporous particle morphology, generating many active sites, a fast-ionic transport and enhanced capacitive properties.…”