Catalytic Decomposition of Hydrogen Peroxide Over Supported Oxides of Manganese

Mooi, John; Selwood, P. W.

doi:10.1021/ja01165a566

Cited by 12 publications

(7 citation statements)

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“…It was observed that the high catalytic activity of samples calcined at 400 • C, as shown in Fig. 5, is presumably due to higher surface area, surface oxygen and surface hydroxyl groups along with the existence of a suitable Mn 3+ -Mn 4+ couple Mooi et al [25]. Kanungo et al [26] have shown that a favorable couple of Mn 3+ -Mn 4+ is essential for catalytic decomposition of H 2 O 2 through electron exchange.…”

Section: Resultsmentioning

confidence: 97%

“…So it is necessary to know the possible changes in the physico-chemical properties and catalytic activity with change in temperature. Previously extensive work has been reported to correlate the physico-chemical characterization and catalytic activity of manganese nodule but few works has been reported on manganese nodule leached residue although the high activity of manganese nodule towards H 2 O 2 decomposition is well known for a long time [8][9][10][11][12][13]. The present study aims at a detailed physico-chemical characterization of manganese nodule leached residue and the effect of calcination temperature on the surface properties as well as the catalytic activity of manganese nodule leeched residue towards H 2 O 2 decomposition.…”

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment on the physico-chemical properties and catalytic activity of manganese nodules leached residue towards decomposition of hydrogen peroxide

Parida

Dash

Mallik

et al. 2005

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment on the physico-chemical properties and catalytic activity of manganese nodules leached residue towards decomposition of hydrogen peroxide

Parida

Dash

Mallik

et al. 2005

Journal of Colloid and Interface Science

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“…Moreover, the studies show that the catalytic decomposition of hydrogen peroxide involves oxidation of H202 by Mn(IV) and reduction by Mn(III) successively (26)(27)(28). The literature never mentions direct reduction of 02 to H20 molecules at ambient temperature.…”

Section: Reoxidation Stepmentioning

confidence: 99%

“…All the papers put forward reduction to intermediary states such as hydrogen peroxide and its radical and ionic derivatives. Moreover, the studies show that the catalytic decomposition of hydrogen peroxide involves oxidation of H202 by Mn(IV) and reduction by Mn(III) successively (26)(27)(28). Finally, in the reoxidation step, hydrogen peroxide and its radical and ionic derivatives play an important role.…”

Section: Reoxidation Stepmentioning

confidence: 99%

Oxygen‐Regeneration of Discharged Manganese Dioxide Electrode: I . General Phenomena Observed on Thick Powder Electrodes

Llompart¹,

Yuan²,

Mas³

et al. 1990

J. Electrochem. Soc.

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The results are obtained in the following conditions: The rate of discharge of the manganese dioxide has been chosen by analogy with the I.E.C. standard for the tape recorder discharge test of LR6 (AA size) alkaline cells. A reduction drain of 25 mA/g of MnO2 was passed through the electrode for 4000s. The circuit was open for 23h and the electrode is exposed to a pure oxygen atmosphere. The electrode device contains 40 mg of MnO2 and 160 mg of graphite. Nine industrial samples are studied. Thick manganese dioxide electrode discharged above 0 V/ENH (> 1.2 V/Zn/Zn § +) can be regenerated by oxygen. The best results are obtained for EMD MnO2, with high compacting pressure of pellet, small size of manganese dioxide particles, short diffusion path of oxygen, and large contact surface with gaseous oxygen. When such conditions are fulfilled, the total capacity reaches 1.2 e/Mn. Without oxygen-regeneration, the capacity measured at 0 V/NHE under argon is about 0.48-0.50 e/Mn. This corresponds to a relative increase of about 250% of its initial capacity. Indeed, these data are related to the described experimental conditions. They must be improved by the use of optimized conditions such as a lower graphite/MnO2 ratio. Above 0.09 V/NHE, there is no significant oxygen-reoxidation kinetics. This potential is identical to the potential of manganese dioxide during the catalyst decomposition of hydrogen peroxide.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 140.182.176.13 Downloaded on 2015-03-16 to IP

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“…Yet the steps of this heterogeneous mechanism are consistent with the steps proposed for the homogeneous decomposition of the vapor (27) and for the reaction steps proposed for both the homogeneous and heterogeneous catalytic decomposition of the liquid (9). In studies of the heterogeneous decomposition of hydrogen peroxide liquid on supported manganese oxide catalysts, Mooi and Selwood (20,21) found that a minimum of two adjacent manganese ions is necessary for the decomposition.…”

Section: Reaction Mechanismmentioning

confidence: 99%