Direct synthesis of hydrogen peroxide (H₂O₂) from H₂ and O₂ is an ideal route. H₂/O₂ plasma has a great potential for direct synthesis of high purity H₂O₂ without purification operations. However, low yield and high energy consumption limits the application of H₂/O₂ plasma in industry. This article reports that gas state Ar and H₂O molecule serving as molecular catalysts promoted the synthesis of H₂O₂ from H₂/O₂/Ar/H₂O plasma dramatically: the H₂O₂ yield was enhanced by 244% and the energy consumption was reduced by 70.9%. Ar not only increased the electron density, but also selectively accelerated the dissociation of H₂ toward the formation of •HO₂, a key intermediate species in H₂O₂ synthesis. While H₂O facilitated the formation of •HO₂ radical and stabilized it by forming a HO₂•H₂O complex, resulting in enhancing the H₂O₂ production. This single molecular catalysis reduced the cost of H₂O₂ synthesis more than 50%. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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氩和水分子对由H2和O2直接合成H2O2的促进作用

从H ₂和O ₂直接合成过氧化氢（H ₂ O ₂）是一种理想的途径。H ₂ / O ₂等离子体具有无需纯化即可直接合成高纯度H ₂ O ₂的巨大潜力。然而，低产率和高能耗限制了H ₂ / O ₂等离子体在工业中的应用。本文报道气态Ar和H ₂ O分子作为分子催化剂促进了H ₂ / O ₂ / Ar / H ₂的合成H ₂ O ₂。O等离子体显着：H ₂ O ₂产率提高了244％，能耗降低了70.9％。Ar不仅增加了电子密度，而且选择性地促进了H ₂的解离，从而形成了H ₂ O ₂合成中的关键中间物种•HO ₂。H ₂ O通过形成HO ₂ •H ₂ O络合物促进了•HO ₂自由基的形成并使其稳定化，从而提高了H ₂ O _2的产生。这种单分子催化降低了H ₂ O ₂的成本合成率超过50％。©2017美国化学工程师学会AIChE J，2017