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 80 publications

(62 citation statements)

References 46 publications

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“…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

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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

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“…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

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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.

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“…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

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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 80 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

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