Hydrogen peroxide synthesis from hydrogen and oxygen in the gas phase is postulated to be a key reaction step in the gas phase epoxidation of propene using gold–titanium silicate catalysts. During this process H2O2 is consumed in a secondary step to oxidise an organic molecule so is typically not observed as a reaction product. We demonstrate that using AuPd nanoparticles, which are known to have high H2O2 synthesis rates in the liquid phase, it is possible to not only oxidise organic molecules in the gas phase but to detect H2O2 for the first time as a reaction product in both a fixed bed reactor and a pulsed Temporal Analysis of Products (TAP) reactor without stabilisers present in the gas feed. This observation opens up possibility of synthesising H2O2 directly using a gas phase reaction.
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机译：气相中由氢和氧合成过氧化氢被认为是使用金-钛硅酸盐催化剂进行丙烯气相环氧化的关键反应步骤。在此过程中，H2O2在第二步中被消耗以氧化有机分子，因此通常不会观察到作为反应产物。我们证明使用已知在液相中具有高H2O2合成速率的AuPd纳米颗粒，不仅可以氧化气相中的有机分子，而且还可以首次将H2O2作为固定产物中的反应产物进行检测床反应器和气体进料中不存在稳定剂的脉冲产品时态分析（TAP）反应器。该观察结果提供了使用气相反应直接合成H 2 O 2的可能性。
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