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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.3
- 수록면
- 965 - 974 (10page)
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Platinum anodes are widely used for metal oxides reduction in LiCleLi2O, however high-cost and lowcorrosionresistance hinder their implementation. NiOeLi2O ceramics is an alternative corrosion resistantanode material. Anode processes on platinum and NiOeLi2O ceramics were studied in (80 mol.%)LiCl-(20mol.%)KCl and (80 mol.%)LiCl-(20 mol.%)KCleLi2O melts by cyclic voltammetry, potentiostatic andgalvanostatic electrolysis. Experiments performed in the LiCleKCl melt without Li2O illustrate that a Ptanode dissolution causes the Pt2þ ions formation at 3.14 V and 550
С and at 3.04 V and 650оС. A twostagePt oxidation was observed in the melts with the Li2O at 2.40 ÷ 2.43 V, which resulted in theLi2PtO3 formation. Oxygen current efficiency of the Pt anode at 2.8 V and 650
С reached about 96%. Theanode process on the NiOeLi2O electrode in the LiCleKCl melt without Li2O proceeds at the potentialsmore positive than 3.1 V and results in the electrochemical decomposition of ceramic electrode to NiOand O2. Oxygen current efficiency on NiOeLi2O is close to 100%. The NiOeLi2O ceramic anode demonstratedgood electrochemical characteristics during the galvanostatic electrolysis at 0.25 A/cm2 for 35 hand may be successfully used for pyrochemical treating of spent nuclear fuel.
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