2009
DOI: 10.1016/j.jssc.2009.02.034
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Kinetics of Mn2O3 digestion in H2SO4 solutions

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Cited by 18 publications
(14 citation statements)
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“…Albeit some diffraction peaks from the XRD patterns of LM-14h and LM-22h (2θ = 21.9°, 37.1°, 40.5°, and 56.0°) can be indexed by a γ-MnO 2 phase already found by Si et al, additional peaks characteristic of such phase are missing. In literature, De Wolff et al suggested that the γ-MnO 2 structure was built from microscopic intergrowths of ramsdellite and pyrolusite (β-MnO 2 ) phases, forming an alternation of (1 × 2) and (1 × 1) tunnels [38,39]. One model was further proposed by Chabre and Pannetier [40], which allowed a successful correlation between structural features and surface properties.…”
Section: Crystal Phase Structurementioning
confidence: 99%
“…Albeit some diffraction peaks from the XRD patterns of LM-14h and LM-22h (2θ = 21.9°, 37.1°, 40.5°, and 56.0°) can be indexed by a γ-MnO 2 phase already found by Si et al, additional peaks characteristic of such phase are missing. In literature, De Wolff et al suggested that the γ-MnO 2 structure was built from microscopic intergrowths of ramsdellite and pyrolusite (β-MnO 2 ) phases, forming an alternation of (1 × 2) and (1 × 1) tunnels [38,39]. One model was further proposed by Chabre and Pannetier [40], which allowed a successful correlation between structural features and surface properties.…”
Section: Crystal Phase Structurementioning
confidence: 99%
“…The results of X-ray diffraction measurements are given in The dissolution step is based on the stability of soluble Mn 3 + in low pH solution in the Pourbaix diagram. It has been shown [25] that there is a short induction period before the transformation into Mn 2 O begins. The origin of this induction period is probably a saturation of the electrolyte with Mn 3 + as a result of Mn 2 O 3 dissolution before disproportionation occurs.…”
Section: Resultsmentioning
confidence: 99%
“…In the meantime, two other samples prepared with the molar ratio of Mn:Mn(AC) 2 = 1 and 0.5 were obtained by changing the Mn powder mass and they were denoted as D02 and D03, respectively. Then the products were dispersed in 0.7 mol L −1 H 2 SO 4 for 4 days to obtain the γ‐MnO 2 phase. Finally, the black sample was separated from the pink transparent acid solution, washed to neutral and dried at 60 °C overnight.…”
Section: Methodsmentioning
confidence: 99%