In-situ preparation of ultra-small Pt nanoparticles within rod-shaped mesoporous silica particles: 3-D tomography and catalytic oxidation of n-hexane

Uson, Laura ; Hueso, José L. ; Sebastian, Víctor (Universidad de Zaragoza) ; Arenal, Raul (Universidad de Zaragoza) ; Florea, Ileana ; Irusta, Silvia (Universidad de Zaragoza) ; Arruebo, Manuel (Universidad de Zaragoza) ; Santamaria, Jesús (Universidad de Zaragoza)

Resumen: The shape and porous configuration of supports are key parameters to design outstanding catalysts. However, the selection of a proper mesoporous support, such as SBA-15, by itself does not guarantee accessibility to catalytic sites. The distribution of the active phase and its stability are strongly related to the procedure used to deposit it on the catalytic substrate. Herein, we have prepared rod-shaped SBA-15 silica supports functionalized with amine groups to facilitate the electrostatic attraction and a good distribution of the resulting Pt-based catalytic nanoparticles along the pore walls. Additionally, the use of tetrakis-(hydroxymethyl)-phosphonium chloride (THPC) as both reductant and stabilizer is presented as a novel alternative for Pt nanoparticle synthesis. The behaviour of this catalyst in the total oxidation of n-hexane demonstrates high activity and excellent stability after 70 h on reaction stream. STEM-HAADF and 3-D tomography were used to confirm the presence of the metallic nanoparticles within the mesochannels and to corroborate their reduced sintering after reaction.

Idioma: Inglés

DOI: 10.1016/j.catcom.2017.06.022

Año: 2017

Publicado en: CATALYSIS COMMUNICATIONS 100 (2017), 93-97 [17 p.]
ISSN: 1566-7367

Factor impacto JCR: 3.463 (2017)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 56 / 146 = 0.384 (2017) - Q2 - T2

Factor impacto SCIMAGO: 0.929 - Chemistry (miscellaneous) (Q1) - Process Chemistry and Technology (Q1) - Catalysis (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EUR/ERC/HECTOR-267626
Financiación: info:eu-repo/grantAgreement/EC/FP7/294094/EU/Synthesis and characterization of NANOstructured materials with LumInescent properties for diaGnostic and tHerapeuTic applications/NANOLIGHT
Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Financiación: info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2011-24988
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-P

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)