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Electroassisted Propane Dehydrogenation at Low Temperatures: Far beyond the Equilibrium Limitation
JACS Au Pub Date : 2021-08-31 , DOI: 10.1021/jacsau.1c00287
Jianshuo Zhang 1 , Ruoyun Ma 1 , Hyungwon Ham 1 , Ken-Ichi Shimizu 1, 2 , Shinya Furukawa 1, 2, 3
Affiliation  

Propylene production by propane dehydrogenation (PDH) generally requires high temperatures due to thermodynamic equilibrium limitations. This study developed a novel type of catalytic system for low-temperature PDH by combining a surface protonics methodology with intermetallic active sites. By application of an electric current, the intermetallic Pt–In/TiO2 catalyst gave a propylene yield of 10.2% with high selectivity, even at 250 °C, where the thermodynamic equilibrium yield was only 0.15%. Electroassisted proton collisions with propane allowed an unusual reaction pathway for low-temperature PDH. Alloying of Pt with In drastically enhanced the activity and selectivity due to the increased electron density of Pt.

中文翻译:

低温电辅助丙烷脱氢:远远超出平衡极限

由于热力学平衡限制,通过丙烷脱氢 (PDH) 生产丙烯通常需要高温。本研究通过将表面质子学方法与金属间活性位点相结合,开发了一种新型的低温 PDH 催化体系。通过施加电流,金属间化合物 Pt-In/TiO 2催化剂的丙烯产率为 10.2%,具有高选择性,即使在 250 °C 时,热力学平衡产率仅为 0.15%。电辅助质子与丙烷碰撞为低温 PDH 提供了不寻常的反应途径。由于 Pt 的电子密度增加,Pt 与 In 的合金化大大提高了活性和选择性。
更新日期:2021-10-25
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