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Abstract
To improve the utilization rate of the precious metal, ruthenium, TiO2 nanospheres containing oxygen vacancies are grown on the surface of layered Ti3C2, and superfine Ru nanoparticles are fixed on the surface of TiO2 nanospheres via hydrogen reduction of a Ru precursor. The presence of titanium in a low oxidation state is verified by X-ray photoelectron spectroscopy, thus confirming the existence of oxygen vacancies. Spherical aberration transmission electron microscopy studies indicate the dispersion of uniform Ru nanoparticles (average diameter: ~2 nm) on TiO2, and the existence of a part of Ru in the form of single atoms. The catalyst with 0.33 wt% Ru loading exhibits the best catalytic performance in the hydrolysis of NaBH4 (NaBH4 hydrolysis rate at 303 K is 60 L·min−1·gRu−1). Further, the catalyst performs well even after five cycles of use.
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