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<p>The reduction of Re(VII) has been studied in alkaline KOH solution using electrochemical cyclic voltammetry (CV) and UV spectroscopy techniques in order to understand the chemical behavior of rhenium comprehensively. Electrochemical characteristic peak related to rhenium species were observed in cyclic voltammograms. The results showed that both hydroxide and O<sub>2</sub><sup>2−</sup> ions were involved in the reduction reaction of Re(VII). Increasing KOH molarities facilitates the reduction of Re(VII). The reduction process of Re(VII) in alkaline media follow a sequence Re(VII) → Re(V) → Re(IV), and pathway for the Re species can be described by: ReO<sub>4</sub><sup>−</sup> → (ReO)O(OH)<sub>4</sub><sup>3−</sup> → ReO(OH)<sub>3</sub><sup>−</sup>.</p>

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Intermediate states of rhenium in alkaline solution

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Liang Yang,
  • Yanqiu Yang,
  • Tongzai Yang

摘要

The reduction of Re(VII) has been studied in alkaline KOH solution using electrochemical cyclic voltammetry (CV) and UV spectroscopy techniques in order to understand the chemical behavior of rhenium comprehensively. Electrochemical characteristic peak related to rhenium species were observed in cyclic voltammograms. The results showed that both hydroxide and O22− ions were involved in the reduction reaction of Re(VII). Increasing KOH molarities facilitates the reduction of Re(VII). The reduction process of Re(VII) in alkaline media follow a sequence Re(VII) → Re(V) → Re(IV), and pathway for the Re species can be described by: ReO4− → (ReO)O(OH)43− → ReO(OH)3−.