Thin film Pt/TiO2 catalysts for the polymer electrolyte fuel cell

Gustavsson, Martin; Ekström, Henrik; Hanarp, Per; Eurenius, Lisa; Lindbergh, Göran; Olsson, Eva; Kasemo, Bengt Herbert

doi:10.1016/j.jpowsour.2006.10.005

Cited by 106 publications

(54 citation statements)

References 34 publications

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“…The surface area of the platinum was estimated by integrating the area under the hydrogen adsorption peaks in cyclic voltammograms recorded in 0.5 M HClO 4 . The results for a number of arrays of Pt supported on TiO x and carbon are reported in Figure 2.…”

Section: Characterisation Of Pt On Tio X and Carbon Supportsmentioning

confidence: 99%

The influence of support and particle size on the platinum catalysed oxygen reduction reaction

Hayden

Pletcher

Suchsland

et al. 2009

Phys. Chem. Chem. Phys.

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A range of platinum deposits, equivalent thicknesses (δ) 0.2 -2.5 nm have been synthesised on carbon and reduced titania (TiO x ) supports using physical vapour deposition on (10 x 10) arrays of electrodes. For δ < 1.0 nm, discrete platinum centres are formed and the TiO x supported platinum show two distinct characteristics; (a) a strong positive shift in the potential for the oxidation of monolayers of CO with decreasing loading of Pt leading to an inability to oxidise the CO on the lowest loadings and (b) a strong negative shift in the potential for the reduction of oxygen. Both observations can be understood in terms of an increase in the irreversibility of the Pt/PtO couple at such surfaces. The same trends, although significantly weaker, are seen with the carbon supported platinum, δ < 1.0 nm, and it is suggested that the Pt/PtO couple on carbon shows intermediate kinetics between Pt on TiO x and bulk Pt. These results have significant implications for understanding the mechanism of oxygen reduction on supported Pt catalysts and hence for the search for alternative supports to platinum for ORR electrocatalysts.

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Section: Characterisation Of Pt On Tio X and Carbon Supportsmentioning

confidence: 99%

The influence of support and particle size on the platinum catalysed oxygen reduction reaction

Hayden

Pletcher

Suchsland

et al. 2009

Phys. Chem. Chem. Phys.

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“…Gustavsson et al [29] and Trogadas and Ramani [30] also showed that the combination of Pt with metal oxides can increase the catalytic activity towards the oxygen reduction. Gustavsson et al [29] used a TiO 2 layer between platinum and Nafion.…”

Section: Optimized Amounts Of Perovskites and Ptmentioning

confidence: 97%

“…Gustavsson et al [29] used a TiO 2 layer between platinum and Nafion. The better performance of this arrangement was attributed to a better dispersion of Pt on TiO 2 compared to Nafion and in addition, substantial proton conduction through the thin TiO 2 layer.…”

Section: Optimized Amounts Of Perovskites and Ptmentioning

confidence: 99%

Combined platinum/perovskite catalyst for an efficient nanostructured air electrode

Thiele

2010

Materials Chemistry and Physics

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This work shows the stepwise improvement of air electrodes by the right combination of catalysts. In all electrodes carbon nanotubes serve as carbon support. The electrodes are produced by ultrasonic mixing of the carbon nanotubes and the catalysts. Their catalytic activity towards oxygen reduction in alkaline solution is evaluated by polarisation curves and electrochemical impedance spectroscopy. In a first step La 1−x Sr x MnO 3 perovskites are investigated, as well as La 0.65 Sr 0.35 MnO 3 and La 0.6 Sr 0.4 CoO 3 are compared. It is found that La 0.65 Sr 0.35 MnO 3 and La 0.6 Sr 0.4 CoO 3 have a positive impact on different parts of the current-potential curve. In a second step the influence of small amounts of platinum as an additional catalyst besides the perovskite is analyzed with the result that platinum lowers significantly the activation polarisation. Finally, the optimum composition of the electrode is found by using the synergetic effect of platinum, La 0.65 Sr 0.35 MnO 3 and La 0.6 Sr 0.4 CoO 3 .

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“…Platinised TiO 2 pigments are the objects of much interest as alternative cathodes in PEMFC applications for the electroreduction of gaseous oxygen [2,[31][32][33][34][35]. In order to Photoplatinization duration (min) Figure 5.…”

Section: Functionalities Of Aip-derived Platinum Nanoparticlesmentioning

confidence: 99%

“…platinum nanoparticles, distributed at the surface of TiO 2 photocatalysts can enhance the photocatalytic activity [15,[22][23][24][25][26][27][28][29], organic residues can alter or cancel this activity [2,30]. While metal platinum nanoparticles are the objects of tremendous interest for electrode applications in proton exchange membrane fuel cells (PEMFC) [2,[31][32][33][34][35], the oxidation of organic residues present at the surface of these nanoparticles, yielding the formation of adsorbed carbon monoxide, can dramatically reduce the efficiency of such electrodes [2,30]. Finally, and from a general point of view, it is obvious that any technical simplification or cost reduction arising from the development of simplified AIP formulations can present practical interests for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Riassetto¹,

Roussel²,

Rapenne³

et al. 2010

Journal of Experimental Nanoscience

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The photochemical reduction of metal precursors under UV light has been studied to produce noble metal nanoparticles. Depending on the metal (Pt, Au or Ag) and precursor (chlorinated or nitrate) natures, different 1-step or 2-step photolytic or photocatalytic reduction mechanisms have been investigated. These mechanisms yield simple all-inorganic methods to generate metal nanoparticles in liquid medium and disperse these particles at the surface of various kinds of supports. Depending on the metal particle and support natures, different functionalities can arise from such easy and low-cost photometallisation methods.

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Thin film Pt/TiO2 catalysts for the polymer electrolyte fuel cell

Cited by 106 publications

References 34 publications

The influence of support and particle size on the platinum catalysed oxygen reduction reaction

The influence of support and particle size on the platinum catalysed oxygen reduction reaction

Combined platinum/perovskite catalyst for an efficient nanostructured air electrode

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

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