Anodically deposited manganese oxide and manganese–tungsten oxide electrodes for oxygen evolution from seawater

Izumiya, Koichi; Akiyama, Eiji; Habazaki, H.; Kumagai, Naokazu; Kawashima, A.; Hashimoto, Kôji

doi:10.1016/s0013-4686(98)00075-9

Cited by 102 publications

(79 citation statements)

References 22 publications

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“…More details about IrO 2 /Ti preparation have been given elsewhere. [7][8][9][10][11][12][13][14][15][16] The IrO 2 /Ti samples were then cut into pieces of 1 Â 16 Â 7:5 mm for anodic deposition. The real surface area of the punched titanium anode was 75% of the apparent surface area and hence was 1.8 cm 2 .…”

Section: Preparation Of Iro 2 /Ti Substratementioning

confidence: 99%

“…The structure of freshly prepared deposits was identified by Rigaku X-ray diffraction using Cu K radiation by -2 mode at the glancing angle of 10 . The grain size of deposits was estimated, if possible, from full width at half maximum of the most intense diffraction line using Sherrer's equation.…”

Section: Physicochemical Characterization Of Electrodesmentioning

confidence: 99%

“…[10][11][12][13] The addition of molybdenum was found more beneficial than tungsten from view points of both stability and oxygen evolution efficiency. 16) Further research resulted in finding that formation of triple oxide by the addition of tungsten to Mn-Mo oxide improved its performance during electrolysis of alkaline and acidic NaCl solutions.…”

Section: Introductionmentioning

confidence: 96%

“…[6][7][8][9][10][11][12][13][14][15] These anodes were prepared by thermal decomposition and anodic deposition methods, where the latter method is more effective in producing durable materials for oxygen evolution reaction during seawater electrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

2009

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IrO 2 /Ti-supported -MnO 2 -type Mn-Mo-W triple oxide anodes were prepared by anodic deposition in MnSO 4 -Na 2 MoO 4 -Na 2 WO 4 -H 2 SO 4 solutions. The performance of anodes for oxygen evolution reaction during electrolysis of 0.5 kmol m À3 NaCl solution was examined at 1000 Am À2 . The stability, kinetics and physicochemical properties of the oxide deposit anodes were characterized by iR-corrected galvanostatic polarization, gravimetric, X-ray photoelectron spectroscopy and X-ray diffraction techniques. The addition of tungsten to the Mn-Mo oxide enhanced the oxygen evolution efficiency of anodes. electrolyte of pH 0 showed the best performance among anodes prepared in this work. The high performance was attributed to the formation of single phase triple oxide with optimum composition, thickness and defect concentration. Tungsten addition beneficially exerts its effect via increasing the electrical conductivity of oxide deposits. The deposition mechanism of the oxides was discussed in terms of stability and population of Mn 3þ species at the anode/electrolyte interface.

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Section: Preparation Of Iro 2 /Ti Substratementioning

confidence: 99%

Section: Physicochemical Characterization Of Electrodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

2009

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“…An anode material to form oxygen in place of Cl 2 by seawater electrolysis is required as in the case of fresh water electrolysis. This concern has been solved by developing special anode bearing single phase multiple oxides consisting mainly of Mn containing also Mo, W, Sn, and/or Fe as active electrocatalysts [9][10][11][12].…”

Section: Anode Materials For Seawater Electrolysismentioning

confidence: 99%

The Use of Renewable Energy in the Form of Methane Via Electrolytic Hydrogen Generation / Zastosowanie Odnawialnej Energii W Formie Metanu Na Drodze Elektrolitycznej Produkcji Wodoru

Hashimoto¹,

Kumagai²,

Izumiya³

et al. 2013

Archives of Metallurgy and Materials

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Extrapolation of world energy consumption from 1990 to 2010 indicates the complete exhaustion of world reserves of oil, natural gas, uranium and coal by 2040, 2043, 2046 and 2053, respectively. For the survival of all people in the whole world, intermittent and fluctuating electricity generated from renewable energy should be supplied in the form of usable fuel to all people in the whole world. We have been working on research and development of global carbon dioxide recycling for the use of renewable energy in the form of methane via electrolytic hydrogen generation using carbon dioxide as the feedstock. We created energy-saving cathodes for hydrogen production, anodes for oxygen evolution without chlorine formation in seawater electrolysis, and catalysts for methanation of carbon dioxide and built pilot plants of industrial scale. Recent advances in materials are described. Industrial applications are in progress.Keywords: Renewable energy, methane supply, CO 2 recycling, electrolytic hydrogen generation, CO 2 methanation, syngas methanation, fuel depletion, survival of world population Ekstrapolacja światowego zużycia energii z lat 1990-2010 wskazuje, że całkowite wyczerpanie światowych zasobów ropy naftowej nastąpi w 2040 roku, gazu ziemnego w 2043 roku, uranu w 2046 roku a węgla w 2053 roku. Dla przetrwania ludzkości na całym świecie energia elektryczna powinna być generowana z odnawialnego źródła w formie paliwa dostępnego dla każdego. Opracowano technologię globalnego recyklingu dwutlenku węgla i zastosowania metanu jako formy odnawialnej energii generowanej poprzez uwodornienie CO 2 wodorem produkowanym podczas elektrolizy wody morskiej. Opracowano energooszczędne katody do produkcji wodoru, anody do produkcji tlenu bez towarzyszącej temu emisji gazowego chloru podczas elektrolizy wody morskiej oraz katalizatory stosowane w procesie uwodornienia dwutlenku węgla. Wybudowano również pilotażową instalację w skali przemysłowej. Praca opisuje ostatnie postępy w industrializacji procesu. Future of EnergyWe have been working on research and development (R&D) of a global CO 2 recycling system over the last two decades. Now the industrial applications of global CO 2 recycling are in progress. At first, let us identify problems in global energy in the current situation of unlimited access to energy resources, including oil, natural gas, coal, and uranium. The US Department of Energy (DOE) is posting energy-related world data over the period from 1980 mostly to 2010 including energy consumption, CO 2 emission, and population of individual areas of the globe in addition to the world reserves of oil, natural gas, and coal [1]. Figure 1 reproduces from the DOE data the chronological patterns of variation in energy consumption per capita over the 29-31 years in three groups of countries as well as those of the world, Japanese, American and Chinese. The difference in the energy consumption per capita among countries is clear. Figure 2 shows the CO 2 emissions per capita. It is difficult at glance to distinguish Figs. 1...

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Active MnO_x Electrocatalysts Prepared by Atomic Layer Deposition for Oxygen Evolution and Oxygen Reduction Reactions

Pickrahn

Park

Gorlin

et al. 2012

Advanced Energy Materials

310

254

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The ability to deposit conformal catalytic thin fi lms enables opportunities to achieve complex nanostructured designs for catalysis. Atomic layer deposition (ALD) is capable of creating conformal thin fi lms over complex substrates. Here, ALD-MnO x on glassy carbon is investigated as a catalyst for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR), two reactions that are of growing interest due to their many applications in alternative energy technologies. The fi lms are characterized by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, ellipsometry, and cyclic voltammetry. The as-deposited fi lms consist of Mn(II) O, which is shown to be a poor catalyst for the ORR, but highly active for the OER. By controllably annealing the samples, Mn 2 O 3 catalysts with good activity for both the ORR and OER are synthesized. Hypotheses are presented to explain the large difference in the activity between the MnO and Mn 2 O 3 catalysts for the ORR, but similar activity for the OER, including the effects of surface oxidation under experimental conditions. These catalysts synthesized though ALD compare favorably to the best MnO x catalysts in the literature, demonstrating a viable way to produce highly active, conformal thin fi lms from earth-abundant materials for the ORR and the OER.

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Anodically deposited manganese oxide and manganese–tungsten oxide electrodes for oxygen evolution from seawater

Cited by 102 publications

References 22 publications

Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

The Use of Renewable Energy in the Form of Methane Via Electrolytic Hydrogen Generation / Zastosowanie Odnawialnej Energii W Formie Metanu Na Drodze Elektrolitycznej Produkcji Wodoru

Active MnO_x Electrocatalysts Prepared by Atomic Layer Deposition for Oxygen Evolution and Oxygen Reduction Reactions

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Anodically deposited manganese oxide and manganese–tungsten oxide electrodes for oxygen evolution from seawater

Cited by 102 publications

References 22 publications

Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

Mn-Mo-W Oxide Anodes for Oxygen Evolution in Seawater Electrolysis for Hydrogen Production

The Use of Renewable Energy in the Form of Methane Via Electrolytic Hydrogen Generation / Zastosowanie Odnawialnej Energii W Formie Metanu Na Drodze Elektrolitycznej Produkcji Wodoru

Active MnOx Electrocatalysts Prepared by Atomic Layer Deposition for Oxygen Evolution and Oxygen Reduction Reactions

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About

Active MnO_x Electrocatalysts Prepared by Atomic Layer Deposition for Oxygen Evolution and Oxygen Reduction Reactions