Abstract
This Letter reports Pd-nanocluster catalysts and their formation in ligand-free Suzuki-Miyaura reactions with palladium(II) nitrate as a precatalyst. The catalysts are water-soluble neutral Pd tetramer and trimer in their singlet electronic states, as identified by UV-vis absorption spectroscopy, and are formed by leaching of spherical Pd(0) nanoparticles with an average diameter of about 3 nm. The Pd(0) nanoparticles are produced by reducing palladium(II) nitrate and characterized with transmission electron microscopy and Pd K-edge extended X-ray fine structure spectroscopy. The Pd(II) reduction is induced by ethanol, enhanced by potassium hydroxide, and monitored with X-ray photoelectron spectroscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 3188-3193 |
| Number of pages | 6 |
| Journal | ACS Applied Nano Materials |
| Volume | 5 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 25 2022 |
Bibliographical note
Publisher Copyright:© 2022 American Chemical Society. All rights reserved.
Funding
We acknowledge financial support from the National Science Foundation Division of Chemistry (Chemical Structure, Dynamics, and Mechanisms; Grant 1800316). This research used resources of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory, and was supported by the U.S. DOE under Contract DE-AC02-06CH11357 and the Canadian Light Source and its funding partners. The authors also thank Dali Qian and Jillian Cramer for their help with TEM.
| Funders | Funder number |
|---|---|
| Argonne National Laboratory | |
| National Science Foundation Division of Chemistry | |
| National Science Foundation Office of International Science and Engineering | |
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China | 1800316 |
| U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center | DE-AC02-06CH11357 |
Keywords
- Pd nanoclusters
- Pd(II) reduction
- UV-vis spectroscopy
- X-ray absorption spectroscopy
- X-ray photoelectron spectroscopy
- cross-coupling
- homogeneous catalysis
ASJC Scopus subject areas
- General Materials Science