This study proposed a novel electrolytic cell–assisted redox system based on lacunary-type polyoxometalate, which can simultaneously remove hydrogen sulphide (H₂S), recover elemental sulphur, and produce hydrogen. In this redox system, H₂S is oxidised into elemental sulphur by using polyoxometalate ([Sm(PMo(VI)₁₁O₃₉)₂]⁻¹¹), which is reduced to corresponding heteropoly blue (reduced polyoxometalates [Sm(PMo(IV)₁₁O₃₉)₂]⁻⁵⁵). Furthermore, heteropoly blue is electrochemically oxidised back into polyoxometalate on the anode surface, and hydrogen is produced on the surface of the cathode in an electrolytic cell. The experimental results indicated that a 94.8% H₂S removal efficiency, and 77.9% sulphur recovery efficiency were achieved under optimum conditions. H₂S was effectively converted to elemental sulphur in the proposed system. Moreover, Optical and electrochemical characterisations demonstrated that the structures of the lacunary-type polyoxometalate could be well-maintained at pH 5, which was most favourable for H₂S removal. Notably, clean energy hydrogen could be produced in polyoxometalate regeneration process. This innovative system—combining H₂S waste conversion to elemental sulphur, electrochemical regeneration of redox mediators, and hydrogen production and thus providing environmental benefits and significant economic value—may have future applications in commercial technology.

这项研究提出了一种新型的基于槽型多金属氧酸盐的电解池辅助氧化还原系统，该系统可以同时去除硫化氢（H ₂ S），回收元素硫并产生氢。在此氧化还原系统中，使用多金属氧酸盐（[Sm（PMo（VI）₁₁ O ₃₉）₂ ] ^-11）将H ₂ S氧化成元素硫，然后还原成相应的杂多蓝（还原的多金属氧酸盐[Sm（PMo（IV ）₁₁ O ₃₉）₂ ] ^-55）。此外，杂多蓝在阳极表面上被电化学氧化成多金属氧酸盐，在电解池的阴极表面上产生氢。实验结果表明，在最佳条件下，H ₂ S的去除效率为94.8％，硫的回收率为77.9％。在提出的系统中，H ₂ S有效地转化为元素硫。此外，光学和电化学表征表明，在pH 5下可以很好地保持凹腔型多金属氧酸盐的结构，这对于去除H ₂ S最有利。值得注意的是，在多金属氧酸盐的再生过程中可以产生清洁能源氢。这个创新的系统-结合H ₂废物转化为元素硫，氧化还原介体的电化学再生以及制氢，从而提供环境效益和重大的经济价值-可能在商业技术中有未来的应用。