Kinetics of Hydrogen Generation from Oxidation of Hydrogenated Silicon Nanocrystals in Aqueous Solutions

Gauhar Mussabek (1, 2) , Sergei Alekseev (3) , Anton Manilov (4) , Sergii Tutashkonko (5) , Tetyana Nychyporuk (6) , Yerkin Shabdan (1) , Gulshat Amirkhanova (2) , Sergei Litvinenko (4) , Valeriy Skryshevsky (4) , Vladimir Lysenko (7)

1 KazNU - Al-Farabi Kazakh National University [Almaty]
2 IICT - Institute of Information and Computational Technologies
3 Taras Shevchenko National University of Kyiv
4 Institute of High Technologies [Kyiv]
5 INL - Institut des Nanotechnologies de Lyon
6 INL - MFN - INL - Matériaux Fonctionnels et Nanostructures
7 iLM - FENNEC - iLM - Formation, élaboration de nanomatériaux et cristaux

Hydrogen generation rate is one of the most important parameters which must be considered for the development of engineering solutions in the field of hydrogen energy applications. In this paper, the kinetics of hydrogen generation from oxidation of hydrogenated porous silicon nanopowders in water are analyzed in detail. The splitting of the Si-H bonds of the nanopowders and water molecules during the oxidation reaction results in powerful hydrogen generation. The described technology is shown to be perfectly tunable and allows us to manage the kinetics by: (i) varying size distribution and porosity of silicon nanoparticles; (ii) chemical composition of oxidizing solutions; (iii) ambient temperature. In particular, hydrogen release below 0 °C is one of the significant advantages of such a technological way of performing hydrogen generation.

Mots clés: hydrogen generation rate; porous silicon nanopowder; nanosilicon oxidation; engineering of silicon nanoparticles

Domaines: Matériaux; Micro et nanotechnologies/Microélectronique; Sciences de l'ingénieur [physics]

Gauhar Mussabek, Sergei Alekseev, Anton Manilov, Sergii Tutashkonko, Tetyana Nychyporuk, et al.. Kinetics of Hydrogen Generation from Oxidation of Hydrogenated Silicon Nanocrystals in Aqueous Solutions. Nanomaterials, 2020, 10 (7), pp.1413. ⟨10.3390/nano10071413⟩. ⟨hal-02904319⟩