Electro-precipitation via oxygen reduction: a new technique for thin film manganese oxide deposition

Abstract

Manganese oxide was electrodeposited from a non-aqueous solution, dimethyl sulfoxide (DMSO), via the reduction of dissolved oxygen.

Unconventional Rapid Synthesis of Layered Manganese Dioxide Nanostructures for Selective Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran

“…Fransaer et al used electrochemically generated superoxide in anhydrous DMSO to electro-precipitate manganese oxides on platinum. 27 The deposition amount was below 50 μg, and the resulting manganese oxide thin film came out as a mixed phase (amorphous, MnO, MnO 2 , and Mn 2 O 3 ). 27 Herein, we propose a solid-state synthesis of manganese oxides using superoxide, completely avoiding any solvents.…”

“…27 The deposition amount was below 50 μg, and the resulting manganese oxide thin film came out as a mixed phase (amorphous, MnO, MnO 2 , and Mn 2 O 3 ). 27 Herein, we propose a solid-state synthesis of manganese oxides using superoxide, completely avoiding any solvents. We systematically investigated the effects of different reaction parameters (temperature, time, oxidant, and water content) on the surface properties of the as-prepared birnessite type layered δ-MnO 2 nanomaterials.…”

“…The rapid exothermic reaction resulted in nanometer-sized Mn 3 O 4 particles at room temperature, where peroxide formed from the decomposition of superoxide in water, which was the oxidant (eq ). Fransaer et al used electrochemically generated superoxide in anhydrous DMSO to electro-precipitate manganese oxides on platinum . The deposition amount was below 50 μg, and the resulting manganese oxide thin film came out as a mixed phase (amorphous, MnO, MnO 2 , and Mn 2 O 3 ) .…”

Self-limiting thin film deposition of amorphous metal oxides from aprotic solvents for oxygen evolution electrocatalysis

“…22 The underlying principle is that the coating should passivate the electrode enough for the reaction to occur, preferentially on the (more conductive) exposed substrate. 20 This process requires balancing film thickness with pore accessibility. 23 The choice of substrate and its pore structure is critical for achieving the desired equilibrium, as mass transport of the precursors to the inner pore walls must not be limiting.…”

“…In this study, we present a cathodic electrodeposition method to produce self-limiting thin films of amorphous mixed metal oxides without the use of complex precursors. Building on the work of Vanhoutte et al , 20 we use dimethylformamide (DMF) as an aprotic solvent to promote the 1 electron oxygen reduction to superoxide, which reacts with and deposits metals from solution as metal oxides (MO x ). Due to the high reactivity of superoxide, the method results in a fast deposition process capable of uniformly precipitating mixtures of metal ions.…”