Regenerated Manganese-Oxide Coated Sands: The Role of Mineral Phase in Organic Contaminant Reactivity

2021 ◽  
Vol 55 (8) ◽  
pp. 5282-5290
Author(s):  
Joseph A. Charbonnet ◽  
Yanghua Duan ◽  
Case M. van Genuchten ◽  
David L. Sedlak
Keyword(s):  
Manganese Oxide ◽  
Organic Contaminant ◽  
Mineral Phase

Role of cyclic voltammetry in characterizing solids: natural and synthetic manganese oxide octahedral molecular sieves

1993 ◽  
Vol 5 (10) ◽  
pp. 1395-1400 ◽  
Author(s):  
Roberto N. De Guzman ◽  
Yan Fei Shen ◽  
Brenda R. Shaw ◽  
Steven L. Suib ◽  
Chi Lin O'Young
Keyword(s):  
Cyclic Voltammetry ◽  
Manganese Oxide ◽  
Molecular Sieves ◽  
Octahedral Molecular Sieves ◽  
Natural And Synthetic

scholarly journals The Role of Al3+-Based Aqueous Electrolytes in the Charge Storage Mechanism of MnOx Cathodes

2020 ◽  
Author(s):  
Véronique Balland ◽  
Mickaël Mateos ◽  
Kenneth D. Harris ◽  
Benoit Limoges
Keyword(s):  
Manganese Oxide ◽  
Critical Analysis ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Storage Mechanism ◽  
Main Charge ◽  
Charge Storage Mechanism ◽  
The Subject

<p>Rechargeable aqueous aluminium batteries are the subject of growing interest, but the charge storage mechanisms at manganese oxide-based cathodes remain poorly understood with as many mechanisms as studies. Here, we use an original <i>in situ</i> spectroelectrochemical methodology to unambiguously demonstrate that the reversible proton-coupled MnO<sub>2</sub>-to-Mn<sup>2+</sup> conversion is the main charge storage mechanism occurring at MnO<sub>2</sub> cathodes over a range of slightly acidic Al<sup>3+</sup>-based aqueous electrolytes. In Zn/MnO<sub>2</sub> assemblies, this mechanism is associated with high gravimetric capacity and discharge potentials, up to 560 mAh·g<sup>-1</sup> and 1.76 V respectively, attractive efficiencies (<i>CE</i> > 98.5 % and <i>EE</i> > 80%) and excellent cyclability (> 750 cycles at 10 A·g<sup>-1</sup>). Finally, we conducted a critical analysis of the data previously published on MnO<sub>x</sub> cathodes in Al<sup>3+</sup>-based aqueous electrolytes to conclude on a universal charge storage mechanism, <i>i.e.</i>, the reversible electrodissolution/electrodeposition of MnO<sub>2</sub>.<i></i></p>

Energetics of the manganese oxide cluster cations MnNO+ (N=2–5): Role of oxygen in the binding of manganese atoms

2006 ◽  
Vol 124 (18) ◽  
pp. 184311 ◽  
Author(s):  
Kensuke Tono ◽  
Akira Terasaki ◽  
Toshiaki Ohta ◽  
Tamotsu Kondow
Keyword(s):  
Manganese Oxide ◽  
Oxide Cluster

Catalytic Activity of Manganese Oxide Anchored on to Alumina and Zirconia for the Synthesis of Dihydropyrimidinones: Role of Acidity, Crystal Phase and Morphology

2014 ◽  
Vol 3 (1) ◽  
pp. 88-102 ◽  
Author(s):  
Mahadevaiah Rekha ◽  
Hagalahalli Hareesh ◽  
Nagaraju Kathyayini ◽  
Narasimaiah Nagaraju
Keyword(s):  
Catalytic Activity ◽  
Manganese Oxide ◽  
Crystal Phase

The role of surface carboxylates in catalytic ozonation of acetone on alumina-supported manganese oxide

2017 ◽  
Vol 128 ◽  
pp. 73-84 ◽  
Author(s):  
Mostafa Aghbolaghy ◽  
Jafar Soltan ◽  
Ronny Sutarto
Keyword(s):  
Manganese Oxide ◽  
Catalytic Ozonation

Efficient Dye Degradation Catalyzed by Manganese Oxide Nanoparticles and the Role of Cation Valence

2016 ◽  
Vol 1 (14) ◽  
pp. 4265-4273 ◽  
Author(s):  
Bharati Debnath ◽  
Anupam Singha Roy ◽  
Sutanu Kapri ◽  
Sayan Bhattacharyya
Keyword(s):  
Manganese Oxide ◽  
Dye Degradation ◽  
Oxide Nanoparticles ◽  
Manganese Oxide Nanoparticles

Fungal oxidative dissolution of the Mn(II)-bearing mineral rhodochrosite and the role of metabolites in manganese oxide formation

2012 ◽  
Vol 15 (4) ◽  
pp. 1063-1077 ◽  
Author(s):  
Yuanzhi Tang ◽  
Carolyn A. Zeiner ◽  
Cara M. Santelli ◽  
Colleen M. Hansel
Keyword(s):  
Manganese Oxide ◽  
Oxidative Dissolution ◽  
Oxide Formation

Uptake of oxo-anions by cements through solid-solution formation: experimental evidence and modelling

2002 ◽  
Vol 90 (9-11) ◽  
Author(s):  
Michael Ochs ◽  
B. Lothenbach ◽  
E. Giffaut
Keyword(s):  
Experimental Data ◽  
High Alumina ◽  
High Uptake ◽  
Mineral Phase ◽  
Solid Solution Formation ◽  
Solution Formation ◽  
Oxo Anions ◽  
End Members ◽  
Initial Uptake

SummaryUptake experiments were carried out with selenate and chromate on fresh and leached Portland and high-alumina cements; and in addition with selenate and selenite on synthetic ettringite. In all experiments with cements, exceptionally high uptake could be observed under conditions where significant amounts of secondary ettringite were formed. Experimental data obtained for pure ettringite corroborated the important role of this mineral phase. However, uptake kinetics show opposite trends in these two systems, which can be viewed as end-members of the same process: Where a fast precipitation of secondary ettringite occurred, initial uptake was high, with K

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