Abstract Catalytic dehydrofluorination of 1,1,1,3,3-pentafluoropropane to 1,3,3,3-tetrafluoropropene was performed on a series of fluorinated NiO/Cr2O3 catalysts. The NiO/Cr2O3 catalysts were more active than the Cr2O3 because the new acid sites provided by NiF2 had higher turnover frequencies (9.43 × 10−3 − 12.08 × 10−3 s−1) than those on the Cr2O3 (4.55 × 10−3 s−1). Also, the NiO/Cr2O3 was more stable than the Cr2O3 due to its lower density of surface acid sites, which alleviated the coke deposition on the catalyst as evidenced by the Raman spectroscopic results. The kinetic results revealed that the15NiO/Cr2O3 had much lower activation energy (63.6 ± 4.5 kJ mol−1) than the Cr2O3 (127.6 ± 3.8 kJ mol−1). Accordingly, different reaction pathways on the two catalysts were proposed, which involved the cleavage of the C F and C H bonds on the surface acid and base sites, respectively.

中文翻译：

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1,1,1,3,3-五氟丙烷在氟化NiO/Cr 2 O 3 催化剂上催化脱氟化氢生成1,3,3,3-四氟丙烯

摘要 在一系列氟化 NiO/Cr2O3 催化剂上进行 1,1,1,3,3-五氟丙烷催化脱氟化氢生成 1,3,3,3-四氟丙烯。NiO/Cr2O3 催化剂比 Cr2O3 更活跃，因为 NiF2 提供的新酸性位点比 Cr2O3 上的那些具有更高的转换频率（9.43 × 10−3 − 12.08 × 10−3 s−1）（4.55 × 10−3 s−1） s-1)。此外，NiO/Cr2O3 比 Cr2O3 更稳定，因为其表面酸性位点密度较低，这减轻了催化剂上的焦炭沉积，如拉曼光谱结果所证明的那样。动力学结果表明，15NiO/Cr2O3 的活化能 (63.6 ± 4.5 kJ mol-1) 远低于 Cr2O3 (127.6 ± 3.8 kJ mol-1)。因此，提出了两种催化剂不同的反应途径，