2003
DOI: 10.2320/matertrans.44.2114
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Anodically Deposited Mn-Mo-Fe Oxide Anodes for Oxygen Evolution in Hot Seawater Electrolysis

Abstract: In order to avoid chlorine evolution on the anode in hot seawater electrolysis, the oxygen evolution anodes were tailored. À2 . In the outside of this range, generally because of lower deposition efficiency, the electrode surface was not completely covered with anodically deposited oxides with a consequent lower oxygen evolution efficiency.

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Cited by 21 publications
(12 citation statements)
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“…Wider cracks and larger areas surrounded by the cracks in both the 1# and the 2# units ( Fig. S7A and B) were observed at pH 1.5, in comparison to the results at pH 2.0 and 4.0, consistent with the morphology of Mn, Mo and W co-deposits in conventional electrochemical processes [33]. Larger W and Mo grain sizes were consistently observed in the 1# (Fig.…”
Section: Effect Of Initial Phsupporting
confidence: 80%
See 1 more Smart Citation
“…Wider cracks and larger areas surrounded by the cracks in both the 1# and the 2# units ( Fig. S7A and B) were observed at pH 1.5, in comparison to the results at pH 2.0 and 4.0, consistent with the morphology of Mn, Mo and W co-deposits in conventional electrochemical processes [33]. Larger W and Mo grain sizes were consistently observed in the 1# (Fig.…”
Section: Effect Of Initial Phsupporting
confidence: 80%
“…Thus, significant fluctuations in the concentrations of W(VI) and Mo(VI) in the wastewater generally occurs [3,[5][6], which translates in variable rates of W and Mo deposition, and thus variable rates of hydrogen production in the MEC units of the stacked BESs. Similarly, pH plays a significant role on the nature of the W and Mo ionic forms present in aqueous solution, on the degree of polymerization of W in electrochemical processes [33], and on the rate of hydrogen evolution in MECs [34][35]. Furthermore, the cathode material also plays an important role.…”
Section: Introductionmentioning
confidence: 99%
“…16,17) The etched substrate was coated with IrO 2 as the intermediate layer using precursor of 0.1 kmol m À3 chloroiridic acid in butanol solution. This layer is necessary to avoid the formation of insulating titanium oxide between electrocatalytically active manganese oxides and Ti substrate during seawater electrolysis at high current densities for a long time.…”
Section: Electrodesmentioning
confidence: 99%
“…The oxygen evolution efficiency was estimated by the difference between the total charge passed during electrolysis and the charge consumed for formation of chlorine analyzed by iodometric titration. The detailed method and accuracy of iodometric titration have been written elsewhere [12].…”
Section: Electrode Performancementioning
confidence: 99%
“…The addition of Mo 6+ [4,6] and/or W 6+ [7] was effective, showing the 100 % oxygen evolution efficiency. Formation of triple oxides, such as Mn-Mo-W oxides [8][9][10], Mn-Mo-Fe oxides [11,12] and Mn-Mo-Sn oxides [13,14] were particularly effective for extension of the lifetime of the anode. The electrocatalysts with Mo, W, Fe and/or Sn were all identified as a single phase multiple oxides of γ-MnO 2 structure, without forming any second oxide phase, and were stable without suffering from oxidative dissolution in the form of MnO 4 in spite of the polarization potential far higher than the oxidation potential of MnO 2 to MnO 4…”
Section: Introductionmentioning
confidence: 99%