Electrospun Au/CeO2 nanofibers: A highly accessible low-pressure drop catalyst for preferential CO oxidation

Moreno, I. (Universidad de Zaragoza) ; Navascues, N. ; Irusta, S. (Universidad de Zaragoza) ; Santamaria, J. (Universidad de Zaragoza)

Resumen: Au/CeO2 catalysts shaped as nanofibers were obtained by supporting Au nanoparticles (ca. 3 nm) on CeO2 nanofibers of around 200 nm diameter. The CeO2 support was prepared by calcining electrospun polymer nanocomposite fibers with a high Ce content; then gold nanoparticles were either synthesized in situ or deposited from a suspension. The prepared catalysts were used in the preferential oxidation of CO in a hydrogen-rich stream. The catalysts prepared by deposition of preformed gold nanoparticles were less stable and underwent sintering due to a weaker nanoparticle–support interaction. In contrast, the catalysts with Au nanoparticles synthesized in situ were active (90% conversion and 46% selectivity) and stable. The fiber-shaped catalyst was able to give maximum reactant access at a much lower pressure drop than catalyst in powder form.

Idioma: Inglés

DOI: 10.1016/j.jcat.2015.06.011

Año: 2015

Publicado en: Journal of Catalysis 329 (2015), 479-489
ISSN: 0021-9517

Factor impacto JCR: 7.354 (2015)

Categ. JCR: ENGINEERING, CHEMICAL rank: 4 / 135 = 0.03 (2015) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 20 / 144 = 0.139 (2015) - Q1 - T1

Factor impacto SCIMAGO: 2.668 - Physical and Theoretical Chemistry (Q1) - Catalysis (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/B008-12
Financiación: info:eu-repo/grantAgreement/EUR/ERC/HECTOR-267626

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)