Water-Based Synthesis of Ultrasmall Nanoparticles of Platinum Group Metal 
Oxides (1.8 nm)

Wetzel, Oliver; Prymak, Oleg; Loza, Kateryna; Gumbiowski, Nina; Heggen, Marc; Bayer, Peter; Beuck, Christine; Weidenthaler, Claudia; Epple, Matthias

doi:10.1021/acs.inorgchem.2c00281

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Water-Based Synthesis of Ultrasmall Nanoparticles of Platinum Group Metal Oxides (1.8 nm)

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Weidenthaler, Claudia
Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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引用

Wetzel, O., Prymak, O., Loza, K., Gumbiowski, N., Heggen, M., Bayer, P., Beuck, C., Weidenthaler, C., & Epple, M. (2022). Water-Based Synthesis of Ultrasmall Nanoparticles of Platinum Group Metal Oxides (1.8 nm). Inorganic Chemistry, 61(12), 5133-5147. doi:10.1021/acs.inorgchem.2c00281.

引用: https://hdl.handle.net/21.11116/0000-000A-2DDA-F

要旨

Ultrasmall nanoparticles of platinum group metal oxides (core diameter of about 1.8 nm) were prepared by alkaline hydrolysis of metal precursors in the presence of NaBH₄ and by colloidal stabilization with tripeptide glutathione. We obtained water-dispersed nanoparticles of Rh₂O₃, PdO, RuO₂, IrO₂, Os/OsO₂, and Pt/PtO. Their size was probed using high-resolution transmission electron microscopy, differential centrifugal sedimentation, small-angle X-ray scattering, and diffusion-ordered ¹H NMR spectroscopy (¹H DOSY). Their oxidation state was clearly determined using X-ray photoelectron spectroscopy, X-ray powder diffraction, and electron diffraction. The chemical composition of the nanoparticles, that is, the ratio of the metal oxide core and glutathione capping agent, was quantitatively determined by a combination of these methods.