Visible-Light-Induced Synthesis of “Surfactant-Free” Pt Nanoparticles in Ethylene Glycol as a Synthetic Approach for Mechanistic Studies on Nanoparticle Formation

• DOI: 10.1021/acs.jpcc.0c06361
• Publication Date: 2020-09-17T13:09:20Z
• Authors: Johanna Schröder; Sarah Neumann; Sebastian Kunz
• Keywords: Biomimetic Synthesis

The alkaline polyol synthesis of "surfactant-free" Pt nanoparticles (NPs) is a straightforward approach to synthesize NPs as colloids. Even challenges such size control have been successfully addressed in the recent past, but reduction mechanism remains poorly understood. This work shows that precursors H2PtCl6 and H2PtBr6 can be performed at low reaction rates using visible light even though neither precursor nor solvent exhibits any detectable absorption range. possibility slowed down visible-light-induced was used for mechanistic investigation on compared with other energy sources (thermal, microwaves, ultraviolet light) induce reaction. obtained insensitivity resulting particle kinetics presented here well previous studies demonstrates clear dependence ratio free OH– revealing strong indications well-known LaMer model not valid picture process.