Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction

Electrocatalytic Activity and Stability of Platinum Nanoparticles Supported on Carbon–Molybdenum Oxides for the Oxygen Reduction Reaction

“…Clear and welldefined voltammetric profiles of the MoO x -C materials were observed ( Figure S4), that were in accordance with the well-established MoO x profiles reported in the literature. [12][13][14][24][25][26][27][28][29] For the Pt-containing materials, the cyclic voltammograms ( Figure 3a nd Figure S4) exhibit the typical hydrogen adsorption-desorption features of aP ts urface at 0.05-0.40 V( H UPD ), followed by the double-layer( 0.40-0.80 V) and the Pt oxide regions (0.80-1.2 V). The electrochemically active surfacea reas (ECSAs) of the electrodes were obtainedf rom the chargei nvolved in the Pt-H ads desorption process (Supporting Information), and the values are presented in Ta ble 3f or all catalysts.…”

“…This effect was attributedt ot he strong metalsupport interaction existingb etween Pt and Ws pecies, which involves the spillover of primary oxides from the WO x to Pt, facilitating CO 2 formation.I na nother study,Çakar and co-authors showedt hat the dispersion of Pt NPs on MoO x resultsi n al argers urface area and an increase of catalytic activity towards the ORR. [11] Likewise, Elezović et al [12,13] found that the increaseo fc atalytic activity of ORR electrocatalysts based on Pt/C doped with MoO x can be explained by ag reater number of ORRa ctive sites or by synergic effects ascribed to the PtMoO x interface. Furthermore, Yane tal.…”

Metal Oxide‐Supported Platinum Overlayers as Proton‐Exchange Membrane Fuel Cell Cathodes

“…It needs to bind platinum strongly enough to shift the dissolution potentials to higher values in order to prevent Pt corrosion during stop-and-go runs. In addition, it needs to maintain or improve the assets of carbonaceous supports, such as the electron conductivity, porosity and surface area size [ [18,19,20,21,22]. All of these supports are stable under corrosive conditions required for PEMFC operation, apart from WO 3 which dissolves moderately [23],and in most cases the specific activities, that is, the activities normalized per surface area, were higher than for the state-of-the-art, Pt deposited on Vulcan-C, catalyst.…”

Preparation and Characterization of Nano Structured Pt−MOx/C for Oxygen Reduction Reaction in Acidic Medium

“…The results of Pt/C and Pt-MOx/C catalysts are presented in Fig. 5, the voltammograms shape is the typical shape of that of Pt nanoparticles in acid medium [57,58]. Pt/C, Pt-TiO 2 /C and Pt-CeO 2 /C electrocatalysts show:…”