Synthesis, characterization and electrocatalytical behavior of Nb–TiO2/Pt nanocatalyst for oxygen reduction reaction

Elezović, N.R.; Babić, Biljana; Gajić-Krstajić, Lj.; Radmilović, Velimir; Krstajić, N.V.; Vračar, L. J. M.

doi:10.1016/j.jpowsour.2010.01.035

Cited by 81 publications

(62 citation statements)

References 46 publications

(54 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5d. Similar Tafel slope for all the electrodes compared was also observed in earlier studies, indicating that the ORR mechanism does not change after incorporation of TiO 2 into the catalyst structure [72,73].…”

Section: Oxygen Reduction On Pt-tio 2 /Mwcnt Catalystssupporting

confidence: 85%

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Jukk

Kongi

Tarre

et al. 2014

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

Section: Oxygen Reduction On Pt-tio 2 /Mwcnt Catalystssupporting

confidence: 85%

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Jukk

Kongi

Tarre

et al. 2014

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

“…20−25 Depending on the atmosphere and the temperature used during calcination, TiO 2 is present as anatase or rutile, and the electronic conductivity is improved. 22,26 Combining good electrocatalytic properties and electronic conductivity within a nanostructure with controlled porosity would lead to a very appealing catalyst support. The Pt dispersion and its effective loading would be better controlled and the porosity would boost the catalytic performance because of better gas permeation.…”

Section: ■ Introductionmentioning

confidence: 99%

Mesoporous Nanostructured Nb-Doped Titanium Dioxide Microsphere Catalyst Supports for PEM Fuel Cell Electrodes

Chevallier

Bauer

Cavaliere

et al. 2012

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Crystalline microspheres of Nb-doped TiO(2) with a high specific surface area were synthesized using a templating method exploiting ionic interactions between nascent inorganic components and an ionomer template. The microspheres exhibit a porosity gradient, with a meso-macroporous kernel, and a mesoporous shell. The material has been investigated as cathode electrocatalyst support for polymer electrolyte membrane (PEM) fuel cells. A uniform dispersion of Pt particles on the Nb-doped TiO(2) support was obtained using a microwave method, and the electrochemical properties assessed by cyclic voltammetry. Nb-TiO(2) supported Pt demonstrated very high stability, as after 1000 voltammetric cycles, 85% of the electroactive Pt area remained compared to 47% in the case of commercial Pt on carbon. For the oxygen reduction reaction (ORR), which takes place at the cathode, the highest stability was again obtained with the Nb-doped titania-based material even though the mass activity calculated at 0.9 V vs RHE was slightly lower. The microspherical structured and mesoporous Nb-doped TiO(2) is an alternative support to carbon for PEM fuel cells.

show abstract

“…Pt/Nb-doped TiO 2 nanofiber catalyst exhibited excellent ORR activity comparable with Pt/C catalyst (81 A g pt −1 ). Those results are the highest value among the TiO 2 -supported Pt catalysts up to date16171819202126272829. During 6,000 potential cycles between 0.6 and 1.1 V RHE , the mass activity measured at 0.9 V RHE decreased from 81 to 52 A g pt −1 for the Pt/Nb-TiO 2 nanofiber catalyst and from 73.8 to 25.9 A g pt −1 for the Pt/C catalyst, the ECSA of Pt/Nb-TiO 2 nanofiber catalyst decreased by about 32% while that of the Pt/C decreased about by 53% of the initial values.…”

Section: Discussionmentioning

confidence: 79%

Electrospun Nb-doped TiO2 nanofiber support for Pt nanoparticles with high electrocatalytic activity and durability

Kim

Kwon

Eom

et al. 2017

Sci Rep

View full text Add to dashboard Cite

This study explores a facile method to prepare an efficient and durable support for Pt catalyst of polymer electrolyte membrane fuel cell (PEMFC). As a candidate, Nb-doped TiO2 (Nb-TiO2) nanofibers are simply fabricated using an electrospinning technique, followed by a heat treatment. Doping Nb into the TiO2 nanofibers leads to a drastic increase in electrical conductivity with doping level of up to 25 at. % (Nb0.25Ti0.75O2). Pt nanoparticles are synthesized on the prepared 25 at. % Nb-doped TiO2-nanofibers (Pt/Nb-TiO2) as well as on a commercial powdered carbon black (Pt/C). The Pt/Nb-TiO2 nanofiber catalyst exhibits similar oxygen reaction reduction (ORR) activity to that of the Pt/C catalyst. However, during an accelerated stress test (AST), the Pt/Nb-TiO2 nanofiber catalyst retained more than 60% of the initial ORR activity while the Pt/C catalyst lost 65% of the initial activity. The excellent durability of the Pt/Nb-TiO2 nanofiber catalyst can be attributed to high corrosion resistance of TiO2 and strong interaction between Pt and TiO2.

show abstract

Synthesis, characterization and electrocatalytical behavior of Nb–TiO2/Pt nanocatalyst for oxygen reduction reaction

Cited by 81 publications

References 46 publications

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Mesoporous Nanostructured Nb-Doped Titanium Dioxide Microsphere Catalyst Supports for PEM Fuel Cell Electrodes

Electrospun Nb-doped TiO2 nanofiber support for Pt nanoparticles with high electrocatalytic activity and durability

Contact Info

Product

Resources

About