Bimetallic platinum–rhenium catalysts supported on activated carbon were tested for the hydrodeoxygenation (HDO) of isoeugenol at 250 °C and 30 bar of H₂ in a batch reactor. The catalysts were characterized by inductively coupled plasma atomic emission spectrometry (ICP-IES), N₂ physisorption, electron microscopy (high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), transmission electron microscopy (TEM)), temperature-programmed reduction, X-ray absorption spectroscopy (X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS)), and temperature-programmed desorption of ammonia. Bimetallic catalysts containing Pt and Re were much more active than monometallic Pt/C and Re/C. Complete isoeugenol conversion, high propylcyclohexane yield (99%), and a high liquid-phase mass balance (77%) were obtained for the catalyst with the highest Re loading, Pt–Re(1:5)/C. Such high activity is attributed to a synergistic effect between the reduced Pt and the Re-oxide species, as both metal active sites and oxygen vacancies are required for HDO. The apparent activation energy for the HDO of isoeugenol with Pt–Re(1:5)/C was 44 kJ/mol.

中文翻译：

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异丁香酚加氢脱氧中的双功能 Pt-Re 催化剂作为可再生航空燃料生产的模型化合物

在间歇式反应器中，在 250 °C 和 30 bar H ₂条件下测试了负载在活性炭上的双金属铂-铼催化剂对异丁香酚的加氢脱氧 (HDO) 。通过电感耦合等离子体原子发射光谱法（ICP-IES）、N _{2对催化剂进行表征}物理吸附、电子显微镜（高角度环形暗场扫描透射电子显微镜（HAADF-STEM）、透射电子显微镜（TEM））、程序升温还原、X射线吸收光谱（X射线吸收近边结构（ XANES) 和扩展的 X 射线吸收精细结构 (EXAFS))，以及氨的程序升温解吸。含有 Pt 和 Re 的双金属催化剂比单金属 Pt/C 和 Re/C 的活性要高得多。对于具有最高 Re 负载量的催化剂 Pt-Re(1:5)/C，获得了完全的异丁香酚转化、高丙基环己烷产率 (99%) 和高液相质量平衡 (77%)。如此高的活性归因于还原的 Pt 和 Re-氧化物物种之间的协同效应，因为 HDO 需要金属活性位点和氧空位。