This paper reports investigations on the formation of hydrogen peroxide resulting from micro-pulse plasma discharges obtained in pin-to-pin configuration underwater. In particular, this study reports the influence of the discharge regime (cathode regime with and without breakdown, and anode regime) as well as that of the discharge energy (from 10 to 45 mJ per pulse). It has been shown that the H 2 O 2 production is higher for high energy and anode regime. In addition, the variation of the pulse width (from 50 to 500 µs) highlights the dependence of the chemical processes induced by the discharge according to the regime. Considering two different electrode materials (tungsten and platinum), we do not observe any significant influence of the electrode material on the H 2 O 2 production, whereas the injected energy depends on the high voltage electrode material. Finally, the erosion of the electrodes have been studied using in-situ optical microscopy and SEM. It is shown that the erosion mechanisms strongly depend on materials, regimes and the polarity of the electrodes.

中文翻译：

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水下等离子放电后过氧化氢形成的研究

本文报告了在水下针对针配置中获得的微脉冲等离子体放电导致过氧化氢形成的研究。特别是，这项研究报告了放电机制（有和没有击穿的阴极机制，以及阳极机制）以及放电能量（从 10 到 45 mJ/脉冲）的影响。已经表明，对于高能量和阳极状态，H 2 O 2 产量更高。此外，脉冲宽度的变化（从 50 到 500 µs）突出了放电引起的化学过程的依赖性。考虑到两种不同的电极材料（钨和铂），我们没有观察到电极材料对 H 2 O 2 产生有任何显着影响，而注入的能量取决于高压电极材料。最后，使用原位光学显微镜和 SEM 研究了电极的侵蚀。结果表明，侵蚀机制在很大程度上取决于电极的材料、状态和极性。