Materials for global carbon dioxide recycling

Hashimoto, Kôji; Yamasaki, Michiaki; Meguro, Shinsaku; Sasaki, Teikichi A.; Katagiri, Hiroshi; Izumiya, Koichi; Kumagai, Naokazu; Habazaki, H.; Akiyama, Eiji; Asami, K.

doi:10.1016/s0010-938x(01)00067-1

Cited by 60 publications

(29 citation statements)

References 16 publications

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“…Figure 4 shows the change in oxygen evolution efficiency of electrode prepared in 0. 2 À was observed during electrolysis except for the MnO 2 anode without addition of other cations. The surface observation after electrolysis revealed that, when significant mass loss was detected, the oxide layers were prone to directly detach from the IrO 2 /Ti substrate, which actively evolves chlorine.…”

Section: Physicochemical Characterization Of Electrodesmentioning

confidence: 95%

“…Figures 8 and 9 show typical X-ray diffraction patterns of Mn-Mo-W oxide deposits prepared in 0. 2 On the other hand, the reflections of Ti substrate are detected for the anodes prepared in the deposition electrolyte of pH À0:1 and in the electrolyte with higher concentration of Mo 6þ such as 0.006 kmol m À3 . This corresponds to the insufficient coverage of the deposit to IrO 2 substrate with high activity for chlorine evolution, because of lower deposition efficiency at pH À0:1 and with higher concentration of Mo 6þ .…”

Section: Phyiscochemical Characterizationmentioning

confidence: 99%

“…Figure 1 presents the change in the oxygen evolution efficiency with the time of electrolysis for deposits prepared in 0. 2 sustains the best durability for oxygen evolution efficiency. Figure 4 shows the change in oxygen evolution efficiency of electrode prepared in 0.…”

Section: Physicochemical Characterization Of Electrodesmentioning

confidence: 99%

“…In this regards, we are proposing global carbon dioxide recycling. 1,2) Key materials necessary for this process are the anode and cathode for seawater electrolysis and the catalyst for CO 2 conversion into CH 4 . We have been creating these key materials.…”

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: Physicochemical Characterization Of Electrodesmentioning

confidence: 95%

Section: Phyiscochemical Characterizationmentioning

confidence: 99%

Section: Physicochemical Characterization Of Electrodesmentioning

confidence: 99%

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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“…[1][2][3][4][5][6][7] Global carbon dioxide recycling consists of power generation by solar cell on deserts, hydrogen production by seawater electrolysis at nearby desert coasts, and methane production by the reaction of hydrogen with carbon dioxide at the desert coasts. Because fresh water is not available at desert coasts, one of the key processes is seawater electrolysis by which we should produce hydrogen and oxygen on the cathode and the anode, respectively.…”

Section: Introductionmentioning

confidence: 99%