One-pot mechanochemical ball milling synthesis of the MnO_x nanostructures as efficient catalysts for CO₂ hydrogenation reactions

Abstract

<p>Here, we report on a one-pot mechanochemical ball milling synthesis of manganese oxide nanostructures synthesized at different milling speeds for efficient carbon dioxide reduction catalyst.</p>

Synthesis and Environmental Applications of Manganese Oxides

“…The original mineral sample (MnOx-I) was containing numerous impurities such as silica, aluminium, iron, sodium, potassium, magnesium, and barium. After the wet milling, impurities of the natural mineral decreased even barium and magnesium content removed but a negligible amount of chromium and nickel detected which was caused by the ball milling as can be observed in our previous work as well [185].…”

Facile Preparation of Oxygen-Vacancy-Mediated Mn3O4 for Catalytic Transfer Hydrogenation of Furfural

“…Except for supported noble-metal catalysts and some traditional transition-metal oxides, − manganese oxide catalysts have been gaining increasing attention for the CTH of FF to FA owing to their excellent performance in the reduction reaction. − Zhou et al demonstrated that Mn 3 O 4 is more beneficial than MnO for the CTH of FF to FA, which was also verified by Feng et al These results suggest that the mixed-valence manganese state in Mn 3 O 4 influences the reaction . Although the FA yield obtained from the above manganese-oxide-based catalysts was relatively high, the catalysts were assisted by N-doped carbon material, involving untoward processing; less attention was given to the oxygen vacancies on these catalysts, which act as specific reaction sites in the CTH of FF process and thus improve the catalytic performance .…”

Review on Medical Applications of Manganese Oxide (Mn2+, Mn3+, and Mn4+) Magnetic Nanoparticles

“…Another physical approach adapted for the synthesis of MnO x nanoparticles is ball milling. Ochirkhuyag et al [81] reported that the MnO x nanostructures are prepared by milling MnCl 2 •4H 2 O and KMnO 4 with 0.09 M of sodium hydroxide and 5 mL of water using stainless grinding balls. It is also worth mentioning that the milling speed could tailor the crystal structure and the oxidation states of the manganese.…”