[Ru(0)]@SiO₂ and [RuO₂]@SiO₂ Hybrid Nanomaterials: From Their Synthesis to Their Application as Catalytic Filters for Gas Sensors

Abstract

Abstract[Ru(0)]@SiO2 and [RuO2]@SiO2 hybrid nanomaterials are produced following a facile method consisting of the synthesis of size‐controlled ruthenium nanoparticles as elemental bricks. This route takes advantage of the organometallic approach and the use of a bifunctional ligand for the synthesis of ruthenium nanoparticles from [Ru(COD)(COT)](COD = 1,3‐cyclooctadiene, COT = 1,3,5‐cyclooctatriene) as metal precursor and (PhCH2)2N(CH2)11O(CH2)3Si(OEt)3 (benzenemethanamine) as stabilizer. Hydrolysis and polycondensation steps via a sol–gel approach lead to the formation of the silica materials containing the metal nanoparticles. A final calcination step in air at 400 °C yields the [RuO2]@SiO2 nanocomposites. Such hybrid nanomaterials display a good dispersion of the nanoparticles inside the silica matrix and interesting porosity properties making them attractive materials for catalytic applications. This is shown by using [RuO2]@SiO2 hybrid nanomaterials as catalytic filters for gas sensors.

A Sol–Gel Ruthenium–Niobium–Silicon Mixed‐Oxide Bifunctional Catalyst for the Hydrogenation of Levulinic Acid in the Aqueous Phase

“…If the images are magnified to get a deeper insight, small black dots appear visible (Figure B, right panel) which are highly dispersed RuO 2 nanocrystals with an average size of approximately 6.0 nm. This value is close to that obtained for RuO 2 @SiO 2 nanocomposites with comparable Ru content, prepared by multistep procedures, that is, approximately 4.0 and 2.5 nm, whereas in the present work we succeeded in synthesising a bulk material by a one‐pot procedure.…”

“…An alternative synthetic approach succeeds in the preparation of Ru/RuO 2 @SiO 2 nanocomposites by using a co‐synthesis sol–gel process, leading simultaneously to the formation of the SiO 2 matrix and metal‐ion doping. This has been obtained by using bifunctional ligands, acting as both NPs stabilizers and sol–gel promoters . In this way, hybrid organic–inorganic mesostructured materials were obtained, which require, however, a two‐step (impregnation/hydrogenation) procedure to obtain Ru NP containing composites.…”

“…In this way, hybrid organic–inorganic mesostructured materials were obtained, which require, however, a two‐step (impregnation/hydrogenation) procedure to obtain Ru NP containing composites. Moreover, the use of organic ligands needs a strict control of the synthesis atmosphere, requiring time‐consuming treatments either in inert gas or under vacuum . In this paper, a novel inorganic mixed‐oxide nanomaterial with the composition (RuO 2 ) 0.038 (Nb 2 O 5 ) 0.024 (SiO 2 ) 0.938 was prepared by a one‐pot sol–gel route.…”

Blaise Pascal Medal: H. B. Kagan / Le Bel Prize: G. Bertrand / Süe Prize: B. Chaudret / Franco–German Prize: M. Antonietti / Coordination Chemistry Prize: R. Poli

“…More recently, he has developed an organometallic method for the synthesis of metal or metal oxide nanoparticles that enables control over the particle size and surface characteristics 3a. The most promising applications of these nanoparticles are found in devices for microelectronics, among which gas sensors have lead to practical industrial applications 3b. Other honors include the Silver Medal of the CNRS (1997), the Gay ‐ Lussac Humboldt Prize (2006), and the Wilkinson Lectureship of the RSC (2008).…”

Blaise‐Pascal‐Medaille: H. B. Kagan / Le‐Bel‐Preis: G. Bertrand / Süe‐Preis: B. Chaudret / Französisch‐Deutscher Preis: M. Antonietti / Koordinationschemie‐Preis: R. Poli

“…Die aussichtsreichsten Einsatzgebiete für diese Nanopartikel sind mikroelektronische Funktionseinheiten – z. B. Gassensoren, in denen sie schon praktische industrielle Anwendungen gefunden haben 3b. Chaudret wurde bereits mit einer CNRS‐Silbermedaille (1997) und dem Gay ‐ Lussac‐Humboldt‐Preis (2006) bedacht; 2008 hielt er die Wilkinson‐Vorlesung der RSC.…”