Hyun Kyunglim, Park Younghwan, Lee Songhyun, Lee Jueun, Choi Yeonwoo, Shin Seung-Jae, Kim Hyungjun, Choi Minkee
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, R. Korea.
Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, R. Korea.
Angew Chem Int Ed Engl. 2021 May 25;60(22):12482-12489. doi: 10.1002/anie.202100814. Epub 2021 Apr 20.
Controlling metal-support interactions is important for tuning the catalytic properties of supported metal catalysts. Here, premade Pd particles are supported on stable polymers containing different ligating functionalities to control the metal-polymer interactions and their catalytic properties in industrially relevant acetylene partial hydrogenation. The polymers containing strongly ligating groups (e.g., Ar-SH and Ar-S-Ar) can form a polymer overlayer on the Pd surface, which enables selective acetylene adsorption and partial hydrogenation to ethylene without deactivation. In contrast, polymers with weakly ligating groups (e.g., Ar-O-Ar) do not form an overlayer, resulting in non-selective hydrogenation and fast deactivation, similar to Pd catalysts on conventional inorganic supports. The results imply that tuning the metal-polymer interactions via rational polymer design can provide an efficient way of synthesizing selective and stable catalysts for hydrogenation.
控制金属与载体之间的相互作用对于调节负载型金属催化剂的催化性能至关重要。在此，将预制的钯颗粒负载在含有不同连接官能团的稳定聚合物上，以控制金属与聚合物之间的相互作用及其在工业相关乙炔部分加氢反应中的催化性能。含有强连接基团（如Ar-SH和Ar-S-Ar）的聚合物可在钯表面形成聚合物覆盖层，从而实现乙炔的选择性吸附和部分加氢生成乙烯且不会失活。相比之下，含有弱连接基团（如Ar-O-Ar）的聚合物不会形成覆盖层，导致非选择性加氢和快速失活，这与传统无机载体上的钯催化剂类似。结果表明，通过合理的聚合物设计来调节金属与聚合物之间的相互作用，可以为合成用于加氢的选择性和稳定催化剂提供一种有效方法。
