TY - JOUR
T1 - Study by high-throughput experimentation of the effect of the pretreatment and precursors on the catalytic activity of tungstated zirconia catalysts
AU - Hernandez-Pichardo, M. L.
AU - Montoya de la Fuente, J. A.
AU - del Angel, P.
AU - Vargas, A.
AU - Reza, C.
N1 - Funding Information:
M.L.H.P. would like to acknowledge to the Instituto Politécnico Nacional (IPN) for the financial support received. We thank the facilities of the Combinatorial Catalysis and Electron Microscopy Laboratories of the Instituto Mexicano del Petroleo. The authors also thank Prof. Ricardo Macías Salinas for the revision of the Manuscript.
PY - 2009/8/25
Y1 - 2009/8/25
N2 - High-throughput experimentation (HTE) was used for the synthesis, characterization and catalytic evaluation of tungstated zirconia (WZ) materials doped with manganese. A library with three series of MnOy-WOx-ZrO2 catalysts was prepared by different methods (surfactant-assisted coprecipitation and impregnation), using different precursors and pretreatments (washing and/or aging). These materials were characterized by XRD, Raman and MET (HRTEM and EDS). Different nanostructures were observed depending on the synthesis method. Highly dispersed WO3 catalysts calcined at 800 °C were obtained by coprecipitation method, while the impregnation method brings the segregation of both, the monoclinic WO3 and ZrO2 phases. The catalytic activity of the Pt-promoted MnOy-WOx-ZrO2 catalysts (0.3 wt.% Pt) was evaluated in the n-hexane hydroisomerization reaction. Although, in the coprecipitated catalysts similar WOx nanostructures were observed, the catalytic activity mainly depends on the zirconia precursor, as well as aging and washing pretreatments, following the order: ZrOCl2 (coprecipitation) > ZrO(NO3)2 (coprecipitation) ≫ Zr(OH)4 (impregnation). The catalysts with highest activity were pretreated by washing and aging.
AB - High-throughput experimentation (HTE) was used for the synthesis, characterization and catalytic evaluation of tungstated zirconia (WZ) materials doped with manganese. A library with three series of MnOy-WOx-ZrO2 catalysts was prepared by different methods (surfactant-assisted coprecipitation and impregnation), using different precursors and pretreatments (washing and/or aging). These materials were characterized by XRD, Raman and MET (HRTEM and EDS). Different nanostructures were observed depending on the synthesis method. Highly dispersed WO3 catalysts calcined at 800 °C were obtained by coprecipitation method, while the impregnation method brings the segregation of both, the monoclinic WO3 and ZrO2 phases. The catalytic activity of the Pt-promoted MnOy-WOx-ZrO2 catalysts (0.3 wt.% Pt) was evaluated in the n-hexane hydroisomerization reaction. Although, in the coprecipitated catalysts similar WOx nanostructures were observed, the catalytic activity mainly depends on the zirconia precursor, as well as aging and washing pretreatments, following the order: ZrOCl2 (coprecipitation) > ZrO(NO3)2 (coprecipitation) ≫ Zr(OH)4 (impregnation). The catalysts with highest activity were pretreated by washing and aging.
KW - High-throughput experimentation
KW - Precursor
KW - Pretreatment
KW - Tungstated zirconia
UR - http://www.scopus.com/inward/record.url?scp=68549092428&partnerID=8YFLogxK
U2 - 10.1016/j.catcom.2009.06.009
DO - 10.1016/j.catcom.2009.06.009
M3 - Artículo
SN - 1566-7367
VL - 10
SP - 1828
EP - 1834
JO - Catalysis Communications
JF - Catalysis Communications
IS - 14
ER -