Authors:
L. Briand Centro de Investigación y Desarrollo en Procesos Catalíticos (CINDECA) Calle 47 No. 257 1900 La Plata Argentina

Search for other papers by L. Briand in
Current site
Google Scholar
PubMed
Close
,
L. Gambaro Centro de Investigación y Desarrollo en Procesos Catalíticos (CINDECA) Calle 47 No. 257 1900 La Plata Argentina

Search for other papers by L. Gambaro in
Current site
Google Scholar
PubMed
Close
, and
H. Thomas Centro de Investigación y Desarrollo en Procesos Catalíticos (CINDECA) Calle 47 No. 257 1900 La Plata Argentina

Search for other papers by H. Thomas in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract  

Temperature-programmed reductions (TPR) with H2 of both pure V2O5 and coprecipitated V2O5−TiO2 systems with different titanium concentrations was performed. The original and the reduced samples following each TPR step were characterized by X-ray diffraction, Fourier transform infrared analysis and scanning electron microscopy. Within the temperature range in which TPR analysis was carried out (100–600°C) the V2O5 phase was reduced in two or three steps, while no variation in the TiO2 phase (anatase or rutile) was observed. In the first reduction step only superficial reduction of the oxides was detected. In the following steps, the H2 reacted with oxygen atoms of the V=O and V−O−V bonds. This led to important changes in the structure and morphology of the system. The experimental evidence allowed the conclusion that titanium stabilizes certain phases of vanadium oxides in which vanadium appears as V(+4) or as a mixture of V(+4) and V(+5). Moreover, when moderate and high titanium concentrations were used, the reduction temperature of the bulk V2O5 decreased markedly.

  • Collapse
  • Expand

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Feb 2024 1 0 2
Mar 2024 0 1 0
Apr 2024 9 0 0
May 2024 2 0 0
Jun 2024 7 0 0
Jul 2024 12 0 0
Aug 2024 0 0 0