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Effects of KIO3 additive on the direct electrosynthesis of K2FeO4

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Abstract

An electrosynthesis in 14.5 M KOH electrolyte using KIO3 additive is presented for the direct synthesis of solid K2FeO4, with a highest efficiency of 77.6%, purities of 95.3–97.8% and a yield of 68 g l−1 K2FeO4 at 65°C. The results show that using the additive during synthesis of ferrate(VI) can increase the current efficiency by 26% than the blank in degree. Its function is similar to the results of using ultrasonic. The techniques of CV, EDX, IR, SEM and XRD are used to feature the Fe electrode or K2FeO4 samples. It is found that addition of KIO3 can increase the potential of oxygen evolution on the CV of Fe anode in KOH significantly. The EDX measurement displays that K2FeO4 sample obtained using KIO3 additive contains no iodine. The sample exhibits similar IR feature absorption spectra and XRD patterns but some dissimilar crystal morphologies to the one with blank.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, 450007, P. R. China

    Weichun He, Guoqin Liu, Wei Cui & Ying Tang

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  1. Weichun He
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  2. Guoqin Liu
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  3. Wei Cui
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  4. Ying Tang
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Correspondence to Weichun He.

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Published in Russian in Elektrokhimiya, 2011, Vol. 47, No. 11, pp. 1375–1380.

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He, W., Liu, G., Cui, W. et al. Effects of KIO3 additive on the direct electrosynthesis of K2FeO4 . Russ J Electrochem 47, 1287–1292 (2011). https://doi.org/10.1134/S1023193511110097

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  • DOI: https://doi.org/10.1134/S1023193511110097

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