Abstract
The Co4CatTM process is a simple, surfactant-free method to produce colloidal dispersions of precious metal nanoparticles in alkaline mono-alcohols. The synthesis is performed in low-boiling-point solvents and is relevant for industrial production. The robustness of the process is demonstrated by using three different commercial spirits as solvents to obtain Pt nanoparticles. The results demonstrate that careful control of the solvent purity is not needed to achieve the synthesis of stable 2 nm platinum nanoparticle colloids readily active electrocatalysts for energy conversion reactions like the methanol oxidation.
Highlights
Precious metal catalysts are used in strategic fields of applications like energy conversion [1], chemical production [2], pollution treatment [3], or medical applications [4]
We reported the synthesis of Pt NPs in mixture of mono-alcohols and water using alkaline low-boiling-point (
The electrocatalysts obtained using Vodka were relatively stable, even though further cycling leads to a decrease of the current density, as expected for Pt nanocatalysts for methanol oxidation [32]
Summary
Precious metal catalysts are used in strategic fields of applications like energy conversion [1], chemical production [2], pollution treatment [3], or medical applications [4]. To make the most of the limited resources down to the atomic scale, precious metal nanoparticles (NPs) with high surface-to-volume ratios are desired but several challenges remain for their large-scale sustainable production [5,6,7,8]. A first challenge is to achieve size control on the nanoscale. Wet chemical syntheses lead to NP colloidal dispersions with several industrial advantages. Colloidal syntheses are relatively simple and fast while they typically show satisfying scalability and reliable control over the NP properties [9]
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