Observation of currentless redox reactions on surface of water jet immersed in low-pressure plasma
Observation of currentless redox reactions on surface of water jet immersed in low-pressure plasma
复制标题
浸没在低压等离子体中的水射流表面无电流氧化还原反应的观察
DOI：
10.1088/1361-6595/ac7745
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
and K. Sasaki
中科院分区：
文献类型：
--
作者：
T. Ito;T. Sakka;and K. Sasaki
研究了低压电感耦合氦等离子体中水射流表面的氧化还原反应。水射流的电势是浮动的，并且没有电流从等离子体供应到水射流。我们观察到分子氢和分子氧的产生。我们还观察到在气相中水蒸气的消耗可以忽略不计，这表明氢和氧的产生不是由于水蒸气的转化。当我们使用银银溶液代替纯水时，我们观察到氢的产生速率降低，而氧的产生速率在纯水和硝酸银溶液中相同。此外，在硝酸银溶液中还发现了银微粒的合成，表明H+和Ag+的还原存在竞争。因此，实验结果揭示了在相同的等离子体-液体界面上同时氧化和还原。
We investigated oxidation–reduction reactions on the surface of water jet immersed in a low-pressure inductively coupled helium plasma. The electrical potential of the water jet was floating, and no electrical current was supplied from the plasma to the water jet. We observed the productions of molecular hydrogen and molecular oxygen. We also observed negligible consumption of water vapor in the gas phase, suggesting that the productions of hydrogen and oxygen were not owing to the conversion from water vapor. When we employed silver nitrate solution instead of pure water, we observed the decrease in the production rate of hydrogen, whereas the production rate of oxygen was the same in pure water and silver nitrate solution. In addition, we found the synthesis of silver particulates in the silver nitrate solution, indicating the competition between the reductions of H+ and Ag+. Thus, the experimental results reveal the simultaneous oxidation and reduction at the same plasma–liquid interface.