Abstract
We report the synthesis of highly ordered mesoporous frameworks consisting of nanocrystalline Co3O4 and Keggin-type tungstophosphoric acid (HPW12O40, HPW) compounds using the hard-templating method. The resulting materials feature a Co3O4/HPW solid solution structure with different HPW loadings, i.e., 6, 11, 15, and 36 wt %. Characterization by small-angle X-ray scattering (SAXS), high-resolution transmission electron microscopy (TEM), and N2 physisorption measurements reveal that all mesoporous frameworks possess a three-dimensional cubic symmetry with large internal Brumauer-Emmett-Teller (BET) surface area (87-141 m2g-1) and narrow sized pores (ca. 4 nm). The Keggin structure of the incorporated PW12O403- clusters within the composite frameworks was confirmed with X-ray diffused scattering and atomic pair distribution function (PDF) analysis, X-ray photoelectron spectroscopy (XPS), infrared (IR), and diffuse-reflectance UV/vis spectroscopy. Catalytic studies have indicated that these Co3O 4/HPW composites can be effective catalysts, exhibiting remarkable catalytic activity on direct decomposition of N2O.
| Original language | English |
|---|---|
| Pages (from-to) | 5739-5746 |
| Number of pages | 8 |
| Journal | Chemistry of Materials |
| Volume | 22 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - Oct 26 2010 |
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ASJC Scopus subject areas
- Materials Chemistry
- Chemical Engineering(all)
- Chemistry(all)
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Nanocasting of ordered mesoporous Co3O4-based polyoxometalate composite frameworks. / Armatas, Gerasimos S.; Katsoulidis, Alexandros P.; Petrakis, Dimitris E.; Pomonis, Philippos J.; Kanatzidis, Mercouri G.
In: Chemistry of Materials, Vol. 22, No. 20, 26.10.2010, p. 5739-5746.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nanocasting of ordered mesoporous Co3O4-based polyoxometalate composite frameworks
AU - Armatas, Gerasimos S.
AU - Katsoulidis, Alexandros P.
AU - Petrakis, Dimitris E.
AU - Pomonis, Philippos J.
AU - Kanatzidis, Mercouri G
PY - 2010/10/26
Y1 - 2010/10/26
N2 - We report the synthesis of highly ordered mesoporous frameworks consisting of nanocrystalline Co3O4 and Keggin-type tungstophosphoric acid (HPW12O40, HPW) compounds using the hard-templating method. The resulting materials feature a Co3O4/HPW solid solution structure with different HPW loadings, i.e., 6, 11, 15, and 36 wt %. Characterization by small-angle X-ray scattering (SAXS), high-resolution transmission electron microscopy (TEM), and N2 physisorption measurements reveal that all mesoporous frameworks possess a three-dimensional cubic symmetry with large internal Brumauer-Emmett-Teller (BET) surface area (87-141 m2g-1) and narrow sized pores (ca. 4 nm). The Keggin structure of the incorporated PW12O403- clusters within the composite frameworks was confirmed with X-ray diffused scattering and atomic pair distribution function (PDF) analysis, X-ray photoelectron spectroscopy (XPS), infrared (IR), and diffuse-reflectance UV/vis spectroscopy. Catalytic studies have indicated that these Co3O 4/HPW composites can be effective catalysts, exhibiting remarkable catalytic activity on direct decomposition of N2O.
AB - We report the synthesis of highly ordered mesoporous frameworks consisting of nanocrystalline Co3O4 and Keggin-type tungstophosphoric acid (HPW12O40, HPW) compounds using the hard-templating method. The resulting materials feature a Co3O4/HPW solid solution structure with different HPW loadings, i.e., 6, 11, 15, and 36 wt %. Characterization by small-angle X-ray scattering (SAXS), high-resolution transmission electron microscopy (TEM), and N2 physisorption measurements reveal that all mesoporous frameworks possess a three-dimensional cubic symmetry with large internal Brumauer-Emmett-Teller (BET) surface area (87-141 m2g-1) and narrow sized pores (ca. 4 nm). The Keggin structure of the incorporated PW12O403- clusters within the composite frameworks was confirmed with X-ray diffused scattering and atomic pair distribution function (PDF) analysis, X-ray photoelectron spectroscopy (XPS), infrared (IR), and diffuse-reflectance UV/vis spectroscopy. Catalytic studies have indicated that these Co3O 4/HPW composites can be effective catalysts, exhibiting remarkable catalytic activity on direct decomposition of N2O.
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UR - http://www.scopus.com/inward/citedby.url?scp=77958098478&partnerID=8YFLogxK
U2 - 10.1021/cm101972h
DO - 10.1021/cm101972h
M3 - Article
AN - SCOPUS:77958098478
VL - 22
SP - 5739
EP - 5746
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 20
ER -