Pt and Pt–Ru nanoparticles decorated polypyrrole/multiwalled carbon nanotubes and their catalytic activity towards methanol oxidation

Spectroelectrochemical study of the electrosynthesis of Pt nanoparticles/poly(3,4-(ethylenedioxythiophene) composite

“…Even more dramatic changes were observed during the second step of PtNPs synthesis (Fig 5a) where the Raman intensity at 1440 cm -1 almost disappears (Fig 5b, thick line). From the behavior described for Raman signals, it can 13 be conclude that Pt has been electrodeposited on the PEDOT film, modifying and just weakening the vibration modes of the polymer film.…”

“…These types of polymers have been applied in different material science areas such as light emitting diodes, sensors and biosensors, solar cells or fuel cells [8][9][10][11][12]. In the case of fuel cells, modification of these polymers with suitable catalysts to improve the efficiency has been extensively studied [13][14][15]. Conducting polymers act as supporting material where the catalysts are anchored, allowing good dispersion and high stability.…”

“…Most of these studies are mainly focused on characterizing the final product, not in understanding, and hence, optimizing the process towards a good final material. The most common techniques in these studies are electrochemistry, scanning electron microscopy (SEM) and some spectroscopic techniques [12][13][14][16][17][18][19], while the use of spectroelectrochemistry is comparatively more scarce.…”

Bimetallic PtRu Nanoparticles Supported on Functionalized Multiwall Carbon Nanotubes as High Performance Electrocatalyst for Direct Methanol Fuel Cells

“…For instance, to promote the distribution of nanoparticles on the supports, some additional stabilizers such as polyaniline (PANI) and polypyrrole (PPy) are introduced on the surface of the supports. 16,17 On one hand, modifying with organic molecules could improve the dispersion of Pt-based catalysts; on the other hand, these organic additives might block the active sites on the Pt-based catalysts and reduce the conductivity of the catalyst. Besides, for the bimetallic catalysts, it is necessary to optimize the methanol oxidation reaction by accurate control over the atom ratio and support surface.…”

Graphene-Supported Platinum and Platinum-Ruthenium Nanoparticles for Fuel Cell Applications

“…However, critical obstacles remain that inhibit broad applications of DEFCs and DMFCs, including low electrocatalytic activity of anode/cathode electrodes and the high cost of noble metal, platinum (Pt)-based catalysts. In order to enhance catalytic activity and to reduce the usage of Pt-based catalysts, one strategy is to explore novel carbon materials as catalyst supports and to effectively disperse Pt-based particles on these supports (Chen et al, 2007;Sanganna Gari et al, 2010;Girishkumar et al, 2006;Halder et al, 2009;Maiyalagan, 2008;Selvaraj & Alagar, 2007;Rajesh et al, 2003;Tang et al, 2004;Tsai et al, 2006;Zhao et al, 2004). Vulcan XC-72R carbon black has been the most widely-used catalyst support for the preparation of fuel cell catalysts because of its exceptional electronic conductivity and surface area (Guo et al, 2008;Lin et al, 2005;Maiyalagan et al, 2005).…”