Tandem Catalysis of Ammonia Borane Dehydrogenation and Phenylacetylene Hydrogenation Catalyzed by CeO<sub>2</sub> Nanotube/Pd@MIL‐53(Al)
Xinyu Li, Lianghao Song, Daowei Gao, Baotao Kang, Huaiqing Zhao, Cuncheng Li, Xun Hu, Guozhu Chen
Abstract
Abstract Heterogeneously catalyzed, selective hydrogenation in the liquid phase is widely used in industry for the synthesis of chemicals. However, it can be a challenge to prevent active nanoparticles (e.g., palladium) from aggregation/leaching and meanwhile achieve high conversion as well as selectivity, especially under mild conditions. To address these issues, a CeO 2 nanotube/Pd@MIL‐53(Al) sandwich‐structured catalyst has been prepared in which the MIL‐53(Al) porous shell can efficiently stabilize the palladium nanoparticles. When this catalyst was used in a tandem catalytic reaction involving the dehydrogenation of ammonia borane and the hydrogenation of phenylacetylene, remarkably, the hydrogen released from the dehydrogenation of ammonia borane boosted the catalytic process, with 100 % conversion of phenylacetylene and a selectivity of 96.2 % for styrene, even at room temperature and atmospheric pressure, within 1 min. This work therefore provides an alternative strategy for balancing the conversion and selectivity of liquid‐phase hydrogenation reactions.