Dual argon plasmas ignited by one direct current power source are used to treat an aqueous solution of hydrogen tetrachloroaurate-(III) trihydrate (HAuCl₄3H₂O) which is contained in an H-type electrochemical cell. The solution contained in one cell acts as a cathode, and in the other as an anode. Experiments are carried out to directly visualize the formation process of gold nanoparticles (AuNPs) in separated cells of the H-type electrochemical reactor. The results and analyzes suggest that hydrogen peroxide and hydrated electrons generated from the plasma-liquid interactions play the roles of reductants in the solutions, respectively. Hydrogen peroxide can be generated in the case of the liquid being a cathode or an anode, while most of hydrated electrons are formed in the case of the liquid being an anode. Therefore, the reduction of the AuCl₄ ⁻ ions is mostly attributed to the hydrogen peroxide as the liquid acts as a cathode, while to the hydrogen peroxide and hydrated electrons as the liquid acts as an anode. Moreover, the pH value of the solution can be used to tune the formation processes and the final form of the AuNPs due to its mediation of reductants.

由一个直流电源点燃的双氩等离子体用于处理四氯金酸 (III) 三水合物 (HAuCl ₄ 3H ₂O) 包含在 H 型电化学电池中。包含在一个电池中的溶液作为阴极，而在另一个电池中作为阳极。进行实验以直接可视化 H 型电化学反应器的分离单元中金纳米粒子 (AuNPs) 的形成过程。结果和分析表明，过氧化氢和等离子体-液体相互作用产生的水合电子分别在溶液中起到还原剂的作用。在液体为阴极或阳极的情况下可产生过氧化氢，而在液体为阳极的情况下形成大部分水合电子。因此，AuCl ₄ ^-的还原离子主要归因于过氧化氢，因为液体充当阴极，而过氧化氢和水合电子，因为液体充当阳极。此外，由于还原剂的介导，溶液的 pH 值可用于调整 AuNPs 的形成过程和最终形式。