Decomposition and Detection of Hydrogen Peroxide Using δ‐MnO2 Thin Film Electrode with Self‐Healing Property

Nakayama, Masaharu; Sato, Ayu; Yamaguchi, Ryota

doi:10.1002/elan.201300285

Cited by 15 publications

(10 citation statements)

References 26 publications

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“…H2O2 is well known to chemically reduce MnO2, even under mild aqueous conditions. [61][62][63] It can thus be assumed that the electrochemically generated H2O2 contributes to the chemical reductive dissolution of the residual MnO2 up to a complete dissolution. Further work is however required to definitely prove such reactivity.…”

Section: Influence Of the Discharging Rate And Charge Transfer Resistancementioning

confidence: 99%

“…2, which therefore solely depends on the pH and Mn 2+ activity in solution.In Region II, it is interesting to note that a new potential plateau is reached at  0.65 V, signing a new faradaic process we attribute to the electrochemical reduction of dioxygen into hydrogen peroxide. H 2 O 2 is well known to chemically reduce MnO 2 , even under mild aqueous conditions [61][62][63]. It can thus be assumed that the electrochemically generated H 2 O MnCl 2 , the Mn 2+ concentration locally released in the diffusion layer cannot significantly alter the already high local concentration of Mn 2+ (0.1 M).…”

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confidence: 99%

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Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Mateos

Makivić

Kim

et al. 2020

Preprint

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Rechargeable batteries based on MnO2 cathodes, able to operate in mild aqueous electrolytes, have attracted remarkable attention due to their appealing features for the design of low-cost stationary energy storage devices. However, the charge/discharge mechanism of MnO2 in such media is still unclear and a matter of debate. Here, an in-depth quantitative spectroelectrochemical analysis of MnO2 thin-films provides a set of important new mechanistic insights. A major finding is that charge storage occurs through the reversible two electron faradaic conversion of MnO2 into water-soluble Mn2+ in the presence of a wide range of weak Brønsted acids, including the [Zn(H2O)6]2+ or [Mn(H2O)6]2+ complexes commonly present in aqueous Zn/MnO2 batteries. Furthermore, it is evidenced that buffered electrolytes loaded with Mn2+ are ideal to achieve highly reversible conversion of MnO2 with both high gravimetric capacity and remarkably stable charging/discharging potentials. In the most favorable case, a record gravimetric capacity of 450 mA·h·g-1 was obtained at a high rate of 1.6 A·g-1, with a coulombic efficiency close to 100% and a MnO2 utilization of 84%. Overall, the present results challenge the common view on MnO2 charge storage mechanism in mild aqueous electrolytes and underline the benefit of buffered electrolytes for high-performance rechargeable aqueous batteries.

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Section: Influence Of the Discharging Rate And Charge Transfer Resistancementioning

confidence: 99%

mentioning

confidence: 99%

Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Mateos

Makivić

Kim

et al. 2020

Preprint

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“…Porous heterogeneous catalytic structures made of oxides of manganese (Mn

) are also commonly researched H

catalysts [ 5 , 8 , 39 ]. In the last decade, catalytic structures based on MnO

are tested as a compatible active substance of calorimetric H

gas sensors [ 12 , 36 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Thermocatalytic Behavior of Manganese (IV) Oxide as Nanoporous Material on the Dissociation of a Gas Mixture Containing Hydrogen Peroxide

et al. 2018

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In this article, we present an overview on the thermocatalytic reaction of hydrogen peroxide (H2O2) gas on a manganese (IV) oxide (MnO2) catalytic structure. The principle of operation and manufacturing techniques are introduced for a calorimetric H2O2 gas sensor based on porous MnO2. Results from surface analyses by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) of the catalytic material provide indication of the H2O2 dissociation reaction schemes. The correlation between theory and the experiments is documented in numerical models of the catalytic reaction. The aim of the numerical models is to provide further information on the reaction kinetics and performance enhancement of the porous MnO2 catalyst.

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“…Examples of different catalysts which have been investigated for the decomposition of H 2 O 2 include noble metal catalysts such as gold nanoparticles supported on KNbO 3 microcubes 9, non‐noble metal compounds such as manganese oxides 10, as well as non‐metal catalysts such as multi‐walled carbon nanotubes 11. Recently, it has been shown that nitrogen doped graphene can catalyse both H 2 O 2 decomposition and reduction reactions 12.…”

Section: Introductionmentioning

confidence: 99%

Modified Glassy Carbon Rotating Disk Electrode for Determination of Heterogeneous Reaction Rate Constant of H₂O₂ Decomposition

2015

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[a] 1IntroductionThed ecomposition of H 2 O 2 (r 2 in Figure 1) is aw ellknown reactionw hich is employed in different processes. Thep roduct of this reaction,O 2 ,c an be either used as monopropellant or as oxidizer in bipropellant engines such as satellitea ttitude controla nd orbit insertion maneuvers [1,2].A lso,t he decomposition of H 2 O 2 is used as ap art of advanced oxidation processes to produce hydroxylr adicals for treatment of hazardous industrial wastewaters [3,4].I ti sa lso an important reaction affecting the efficiencyo fd ifferent types of fuel cells.Hydrogen peroxide may be produced as an intermediate product in fuel cells using O 2 as the oxidant, and as such it attackst he electrolyte membrane in the polymer electrolyte fuel cells resulting in the mechanical failure of the membrane [5,6].M oreover, H 2 O 2 formation is as erious concern resultingi nar eduction of the activity of Ptbased catalystst oward oxygenr eduction reaction [ 7].I ts decomposition is ad esirable reactioni ns uch fuel cells not only because it gets eliminated,b ut also because it recycles O 2 for reduction. On the other hand, the decomposition of H 2 O 2 is an undesirable reaction when H 2 O 2 is used as the oxidant. Fori nstance,t he formationo fg as bubbles in membraneless microfluidic fuel cells causes crossover and even blockage of the fluidchannel [8].Examples of different catalysts which have been investigatedf or the decomposition of H 2 O 2 include noble metal catalysts such as gold nanoparticles supported on KNbO 3 microcubes [9],n on-noble metal compoundss uch as manganese oxides [10],a sw ell as non-metal catalysts such as multi-walled carbonn anotubes [11].R ecently,i t has been shown that nitrogen doped graphene can catalyse both H 2 O 2 decomposition and reduction reactions [12].N -doped graphene is an ew structure of carbon based catalysts with nitrogen atoms decoratedo nt he honeycomb lattice.Theh eterogeneous reaction rate constant of H 2 O 2 decomposition, k A ,b ased on the surface area of catalystc an be used to compare the intrinsic catalytic activities of different catalysts towardH 2 O 2 decomposition.I no rder to determine k A ,t he concentrationo fH 2 O 2 (c)i sg enerally monitored versus time in as uspension containing ak nown amount of catalyst [13,14].T he heterogeneous reactionr ate constant based on the volumeo ft he suspension, k V ,i st hen determined from the slopeo fl n(c)v ersus time assuming that the reactionf ollows af irst order reaction. Subsequently, k V is converted to k A by using the specific surface area (A), the mass of catalysts uspended in the solution( m), and the suspensionv olume( V):Gasometry and gold rotating diske lectrode( RDE) are two conventionalm ethods employed to measure the H 2 O 2 concentration [13][14][15].I nt he former method, the volume of O 2 produced in the processi su sed to determine H 2 O 2 concentration. In the latter method, the H 2 O 2 concentration is measured from the oxidation of H 2 O 2 on ag old electrode by using the Levich equation. Iodome...

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Decomposition and Detection of Hydrogen Peroxide Using δ‐MnO₂ Thin Film Electrode with Self‐Healing Property

Cited by 15 publications

References 26 publications

Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Thermocatalytic Behavior of Manganese (IV) Oxide as Nanoporous Material on the Dissociation of a Gas Mixture Containing Hydrogen Peroxide

Modified Glassy Carbon Rotating Disk Electrode for Determination of Heterogeneous Reaction Rate Constant of H₂O₂ Decomposition

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Decomposition and Detection of Hydrogen Peroxide Using δ‐MnO2 Thin Film Electrode with Self‐Healing Property

Cited by 15 publications

References 26 publications

Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Accessing the Two-Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes

Thermocatalytic Behavior of Manganese (IV) Oxide as Nanoporous Material on the Dissociation of a Gas Mixture Containing Hydrogen Peroxide

Modified Glassy Carbon Rotating Disk Electrode for Determination of Heterogeneous Reaction Rate Constant of H2O2 Decomposition

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Decomposition and Detection of Hydrogen Peroxide Using δ‐MnO₂ Thin Film Electrode with Self‐Healing Property

Modified Glassy Carbon Rotating Disk Electrode for Determination of Heterogeneous Reaction Rate Constant of H₂O₂ Decomposition