On the stability of platinum-composite electrocatalysts prepared with different substrate materials

Košević, Milica; Šekularac, Gavrilo; Panić, Vladimir V.

doi:10.5599/jese.269

Cited by 2 publications

(2 citation statements)

References 19 publications

(22 reference statements)

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“…Although the CV of Pt/TiO2tt is typical for nanostructured Pt in acid solution, the registered CV currents were considerably lower in comparison to Pt/C composite counterpart, as it was already found during a preliminary investigation of the CV response stability. [27] The reported consideration indicate that only Pt from the surface of the agglomerates could contribute to the measured CV response (the loading of 7-nm-sized Pt particles [27] calculated from CV of Pt/TiO2tt (Figure 6) is only 3 wt. %).…”

Section: Electrochemical Properties Of Pt/tio2 From CV Responsementioning

confidence: 95%

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TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Košević¹,

Šekularac²,

Živković³

et al. 2017

Croat. Chem. Acta

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TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave-assisted polyol process. Physicochemical properties of TiO2 and TiO2-supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X-ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings. The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.

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Section: Electrochemical Properties Of Pt/tio2 From CV Responsementioning

confidence: 95%

“…[27] It was found that the activity decreased upon cycling, which was more pronounced at lower sweep rates. This finding was assigned to less reversible Pt particles transformations at lower sweep rates, including agglomeration and coarsening, as the most probable cause.…”

Section: Introductionmentioning

confidence: 97%

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Košević¹,

Šekularac²,

Živković³

et al. 2017

Croat. Chem. Acta

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Combined Chemical and Thermal Sintering for High Conductivity Inkjet-printed Silver Nanoink on Flexible Substrates

Ivanišević

Kassal

Milinković

et al. 2019

Chem. biochem. eng. q. (Online)

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Electrical conductivity is a key factor in measuring performance of printed electronics, but the conductivity of inkjet-printed silver nanoinks greatly depends on post-fabrication sintering. In this work, two different conductive silver nanoinks, in which the silver nanoparticles were stabilized by two different capping agents – Poly(acrylic acid) (PAA) and Poly(methacrylic acid) (PMA) – were synthesized. The inks were inkjet-printed on flexible PET substrates, coated with an additional polycation layer, which facilitated chemical sintering. The printed features were then exposed to moderately elevated temperatures to evaluate the effect of combined chemical and thermal sintering. Both inks produced conductive features at room temperature, and the conductivity increased with both temperature and duration of sintering. At temperatures above 100 °C, the choice of capping agent had no pronounced effect on conductivity, which approached very high values of 50 % of bulk silver in all cases. The lowest resistivity (2.24 μΩ cm) was obtained after sintering at 120 °C for 180 min. By combining chemical and conventional thermal sintering, we have produced remarkably conductive silver electrodes on flexible substrates, while using low-cost and simple processes.

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On the stability of platinum-composite electrocatalysts prepared with different substrate materials

Abstract: Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary

Cited by 2 publications

References 19 publications

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Combined Chemical and Thermal Sintering for High Conductivity Inkjet-printed Silver Nanoink on Flexible Substrates

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