The effect of additional doping with Nb, Al or Cu on ferromagnetism and conductivity in V-doped TiO2 powders

Facile preparation of rutile Ti0.7W0.3O2 with high conductivity and its effect on enhanced electrocatalytic activity of Pt as catalyst support

“…It is known that TiO 2 can be doped with other cations to prepare rutile Ti 1 À x M x O 2 (M = Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ru, and Ir), and some of these oxides have been evaluated in electrochemical environments [16][17][18][19][20][21][22]. DiSalvo and Abruna have recently shown that W-doped TiO 2 (rutile phase: Ti (1 À x) W x O 2 ) is conducting and stable in oxidizing acids for a long time, which is suitable for Pt catalyst supports [23][24][25].…”

Cover Picture: A Viable Hydrogen Storage and Release System Based on Cesium Formate and Bicarbonate Salts: Mechanistic Insights into the Hydrogen Release Step (ChemCatChem 15/2015)

“…The maximum atomic percentage was 20 at %, which is higher than the values reported in the literature by using dissolution methods of synthesis. Generally, the common maximum values were about 10 at % 34–38. For example, Kang et al obtained doping up to 10 at % by using a solvothermal method 37.…”

“…However, only a few studies on the doping of TiO 2 with Al have been performed, and in these cases, the percentage of doping was low, at around 3 wt % (Al/TiO 2 ), which is 10 at %, the maximum doping obtained by using dissolution methods for synthesis 34–38. For example, Kang reported doping of up to 10 at % by using a solvothermal method,37 and Zaki et al reported doping of 3 at % with different ions by using a sol–gel method of synthesis 38…”

Nanostructured TiO2 Doped with Nb as a Novel Support for PEMFC

“…It has been observed that the insertion of ions in the TiO 2 structure has a double positive effect in the material properties. In one hand, the inclusion of pentavalent ions contributes to diminishing the number of trivalent defects in the material, increasing their chemical stability; also, there is evidence that many of these ions occupy substitutional sites by replacing the Ti atoms in the structure; as a consequence, the material attains an excess of electronic charge carriers and exhibits an n-type semiconductor properties with electronic conductivities several orders of magnitude higher than TiO 2 unmodified [21][22][23]. In this work, the TiO 2 was doped with Nb as an approach to obtain a material that combines all the desirable catalyst support properties along with a remarkable electrochemical stability for its utilization in long-term PEMFC applications.…”