XPS study of [Ir(COD)Cl]2–L–SiO2 catalytic system
- Authors: Nartova A.V.1, Donskikh K.G.1, Kvon R.I.1, Kovtunova L.M.1,2, Dmitrachkov A.M.1, Skovpin I.V.2, Koptyug I.V.2, Bukhtiyarov V.I.1
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Affiliations:
- Boreskov Institute of Catalysis SB RAS
- International Tomography Center SB RAS
- Issue: Vol 66, No 2 (2025)
- Pages: 136-146
- Section: VIII МЕЖДУНАРОДНАЯ НАУЧНАЯ ШКОЛА-КОНФЕРЕНЦИЯ МОЛОДЫХ УЧЕНЫХ “КАТАЛИЗ: ОТ НАУКИ К ПРОМЫШЛЕННОСТИ” (30 СЕНТЯБРЯ ‒ 3 ОКТЯБРЯ 2024 г., ТОМСК)
- URL: https://journals.rcsi.science/0453-8811/article/view/307655
- DOI: https://doi.org/10.31857/S0453881125020075
- EDN: https://elibrary.ru/skxolj
- ID: 307655
Cite item
Abstract
The X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR) spectroscopy were used to study the features of anchoring of the [Ir2(COD)2Cl2] complex on the surface of modified silica gelL–SiO2 where L – NC5H5–CH2–CH2–, N(CH3)2–CH2–CH2–CH2–, NH2–C3H6–) depending on the nature of the linker and the conditions of preparation of the systems. The catalytic activity was tested in reactions of gasphase selective hydrogenation of propylene with parahydrogen (p-H2). According to the XPS data, a singlesite iridium catalyst is prepared in all cases. Analysis of the XPS spectra indicates the possibility of anchoring the complex through one of the Ir atoms while preserving the dimer. It was shown that at different durations of interaction of the iridium complex solution with modified NH2–C3H6 silica gel approximately the same amount of the complex is anchored, but the nature of the complex coordination changes. For the sampleobtained by long-term interaction of the complex solution with the modified support (24 h), a high increase in the NMR signal was observed at 60°C, while in the case
About the authors
A. V. Nartova
Boreskov Institute of Catalysis SB RAS
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia
K. G. Donskikh
Boreskov Institute of Catalysis SB RAS
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia
R. I. Kvon
Boreskov Institute of Catalysis SB RAS
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia
L. M. Kovtunova
Boreskov Institute of Catalysis SB RAS; International Tomography Center SB RAS
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia; Institutskaya str., 3A, Novosibirsk, 630090 Russia
A. M. Dmitrachkov
Boreskov Institute of Catalysis SB RAS
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia
I. V. Skovpin
International Tomography Center SB RAS
Email: nartova@catalysis.ru
Institutskaya str., 3A, Novosibirsk, 630090 Russia
I. V. Koptyug
International Tomography Center SB RAS
Email: nartova@catalysis.ru
Institutskaya str., 3A, Novosibirsk, 630090 Russia
V. I. Bukhtiyarov
Boreskov Institute of Catalysis SB RAS
Author for correspondence.
Email: nartova@catalysis.ru
Acad. Lavrentieva ave., 5, Novosibirsk, 630090 Russia
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