The present study demonstrates a novel method for the NO_x reduction by H₂ in lean exhaust gases using H₂ released from a Liquid Organic Hydrogen Carrier (LOHC). The concept implies the simultaneous H₂ production and H₂-deNO_x reaction, which both take place on the same catalyst. In a first approach, the catalyst was suspended in the LOHC, while the exhaust flowed through the slurry. The experiments performed with a O₂-rich model exhaust and perhydro dibenzyltoluene as LOHC as well as Pd/C, Pt/C and Pt/Al₂O₃ catalysts evidenced the feasibility of this transfer hydrogenation. As a result, the Pd/C catalyst revealed best H₂-deNO_x performance providing NO_x conversions up to 98% above 200 °C with almost selective N₂ formation. The characterization of the catalysts by temperature-programmed desorption of CO suggested that the superiority of the Pd/C sample is associated with its pronounced number of active Pd sites. Furthermore, the investigations also showed some LOHC degradation during the exposure to the lean model exhaust yielding CO, CO₂ and hydrocarbons.

本研究表明为NO的新方法_X还原由H ₂在使用H贫废气₂从液态有机氢载波（LOHC）释放。该概念意味着同时产生 H ₂和 H ₂ -deNO _x反应，这两者都在同一催化剂上发生。在第一种方法中，催化剂悬浮在 LOHC 中，而废气则流过浆液。使用富含O _{2 的}模型排气和全氢二苄基甲苯作为 LOHC 以及 Pd/C、Pt/C 和 Pt/Al ₂ O _{3 进行的实验}催化剂证明了这种转移氢化的可行性。因此，Pd/C 催化剂显示出最佳的 H ₂ -deNO _x性能，在 200°C 以上提供高达 98% 的NO _x转化率，并且几乎选择性地形成N ₂。通过程序升温解吸 CO 对催化剂的表征表明 Pd/C 样品的优越性与其显着数量的活性 Pd 位点有关。此外，调查还表明，在暴露于产生 CO、CO ₂和碳氢化合物的贫模型排气过程中，LOHC 会发生一些退化。