Tuning coordinated supported catalysts: Carboxylic acid-based ligands to improve ceria-supported Pt catalysts for hydrosilylation

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NSTL
Elsevier

外文摘要：Ligand-coordinated supported catalysts (LCSCs) with highly-dispersed metal centers are of growing interest to bring the high selectivity and metal utilization efficiency of isolated, well-defined metal centers to a solid support for recyclability and stability. Pt LCSCs with bidentate N-based ligands have shown high activity, selectivity, and stability in hydrosilylation catalysis. Here, we tuned Pt LCSCs with carboxylic acid-based ligands as "anchoring ligands" with bidentate N-based ligand or as "coordination ligand." X-ray photoemission spectroscopy and inductively coupled plasma mass spectrometry were performed after the test reaction, hydrosilylation of 1octene, to evaluate the leaching of Pt. Using trimesic acid (TMA) as the "anchoring ligand" reduced Pt leaching from 34% after only 1 batch to ~25% after 4 batches. Using TMA as the "coordination ligand" creates a catalyst with 7 times higher turnover number than previous LCSCs. Two other carboxylic acid-based ligands were explored, both creating active and selective Pt hydrosilylation LCSCs.

外文关键词：

Heterogeneous catalysisPlatinumCarboxylic acid ligandsHydrosilylationX-ray photoemission spectroscopyLigand-coordinated supported catalystsRAY PHOTOELECTRON-SPECTROSCOPYPLATINUM(0)-CARBENE COMPLEXESPLATINUM NANOPARTICLESSINGLESURFACEEFFICIENTHYDROGENATIONOXIDETRICHLOROSILANEPOLYSILOXANES

作者：

Ali, Iyad S.、Chen, Linxiao、Rezvani, Fereshteh、Zhou, Xuemei、Tait, Steven L.

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作者单位：

Indiana Univ

出版年：

2022

DOI：

10.1016/j.apcata.2022.118634

Applied Catalysis

ISSN：0926-860X

年,卷(期)：2022.639

参考文献量76