Aberration-corrected HRTEM study of Mn-doped tungstated zirconia catalysts

P. Del Angel; M. L. Hernandez-Pichardo; J. A. Montoya De La Fuente

doi:10.1016/j.cattod.2012.09.025

Aberration-corrected HRTEM study of Mn-doped tungstated zirconia catalysts

P. Del Angel, M. L. Hernandez-Pichardo, J. A. Montoya De La Fuente

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Solid acids as tungstated zirconia have received significant attention for isomerization reactions. The identification of catalytically active WO _x nanostructures supported on ZrO₂ presents significant challenges, since different surface WO_x species have been proposed. In this work the results of the structure and domain size of the very small tungsten oxides species (WO_x) supported on zirconia are presented. Electron micrographs of a Mn-WO_x-ZrO₂ active catalyst obtained in an aberration-corrected high resolution transmission electron microscope (HRTEM) allowed direct imaging of subnanometer tungsten oxide, from mono- to poly-tungstate WO_x species as well as the presence of tungsten oxides crystallites (WO₃) over ZrO₂ in a homogeneous distribution. It is shown that it is feasible to identify and measure these WO_x nanospecies supported on zirconia by using an aberration-corrected HRTEM.

Original language	English
Pages (from-to)	201-205
Number of pages	5
Journal	Catalysis Today
Volume	212
DOIs	https://doi.org/10.1016/j.cattod.2012.09.025
State	Published - 1 Sep 2013
Externally published	Yes

Keywords

Aberration-corrected HRTEM
Tungstated zirconia
WO nanostructures

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10.1016/j.cattod.2012.09.025

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title = "Aberration-corrected HRTEM study of Mn-doped tungstated zirconia catalysts",

abstract = "Solid acids as tungstated zirconia have received significant attention for isomerization reactions. The identification of catalytically active WO x nanostructures supported on ZrO2 presents significant challenges, since different surface WOx species have been proposed. In this work the results of the structure and domain size of the very small tungsten oxides species (WOx) supported on zirconia are presented. Electron micrographs of a Mn-WOx-ZrO2 active catalyst obtained in an aberration-corrected high resolution transmission electron microscope (HRTEM) allowed direct imaging of subnanometer tungsten oxide, from mono- to poly-tungstate WOx species as well as the presence of tungsten oxides crystallites (WO3) over ZrO2 in a homogeneous distribution. It is shown that it is feasible to identify and measure these WOx nanospecies supported on zirconia by using an aberration-corrected HRTEM.",

keywords = "Aberration-corrected HRTEM, Tungstated zirconia, WO nanostructures",

author = "{Del Angel}, P. and Hernandez-Pichardo, {M. L.} and {Montoya De La Fuente}, {J. A.}",

note = "Funding Information: The authors thank the facilities of the Electron Microscopy Laboratory of the Instituto Mexicano del Petr{\'o}leo. M.L.H.P. also would like to acknowledge to the Instituto Polit{\'e}cnico Nacional (IPN) and Conacyt for the financial support received.",

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doi = "10.1016/j.cattod.2012.09.025",

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AU - Del Angel, P.

AU - Hernandez-Pichardo, M. L.

AU - Montoya De La Fuente, J. A.

N1 - Funding Information: The authors thank the facilities of the Electron Microscopy Laboratory of the Instituto Mexicano del Petróleo. M.L.H.P. also would like to acknowledge to the Instituto Politécnico Nacional (IPN) and Conacyt for the financial support received.

PY - 2013/9/1

Y1 - 2013/9/1

N2 - Solid acids as tungstated zirconia have received significant attention for isomerization reactions. The identification of catalytically active WO x nanostructures supported on ZrO2 presents significant challenges, since different surface WOx species have been proposed. In this work the results of the structure and domain size of the very small tungsten oxides species (WOx) supported on zirconia are presented. Electron micrographs of a Mn-WOx-ZrO2 active catalyst obtained in an aberration-corrected high resolution transmission electron microscope (HRTEM) allowed direct imaging of subnanometer tungsten oxide, from mono- to poly-tungstate WOx species as well as the presence of tungsten oxides crystallites (WO3) over ZrO2 in a homogeneous distribution. It is shown that it is feasible to identify and measure these WOx nanospecies supported on zirconia by using an aberration-corrected HRTEM.

AB - Solid acids as tungstated zirconia have received significant attention for isomerization reactions. The identification of catalytically active WO x nanostructures supported on ZrO2 presents significant challenges, since different surface WOx species have been proposed. In this work the results of the structure and domain size of the very small tungsten oxides species (WOx) supported on zirconia are presented. Electron micrographs of a Mn-WOx-ZrO2 active catalyst obtained in an aberration-corrected high resolution transmission electron microscope (HRTEM) allowed direct imaging of subnanometer tungsten oxide, from mono- to poly-tungstate WOx species as well as the presence of tungsten oxides crystallites (WO3) over ZrO2 in a homogeneous distribution. It is shown that it is feasible to identify and measure these WOx nanospecies supported on zirconia by using an aberration-corrected HRTEM.

KW - Aberration-corrected HRTEM

KW - Tungstated zirconia

KW - WO nanostructures

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DO - 10.1016/j.cattod.2012.09.025

M3 - Artículo

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SN - 0920-5861

VL - 212

SP - 201

EP - 205

JO - Catalysis Today

JF - Catalysis Today

ER -

Aberration-corrected HRTEM study of Mn-doped tungstated zirconia catalysts

Abstract

Keywords

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