Influence of nanostructured ceria support on platinum nanoparticles for methanol electrooxidation in alkaline media

Abstract

The catalytic activity of platinum (Pt) nanoparticles (NPs) towards methanol electrooxidation in alkaline media was demonstrated to be dependent on their interactions with their nanostructured ceria support. Ceria nanorods (NRs) with diameters of 5 to 10 nm and lengths of 15 to 50 nm as well as ceria NPs with diameters of 2 to 6 nm were applied as supports for similarly sized Pt NPs with diameters of 2 to 5 nm.Cyclic voltammetry data showed that Pt NPs supported on ceria NPs exhibited a 2-to-5-fold higher catalytic current density versus ceria NRs. X-ray photoelectron spectroscopic data indicated that Pt NPs deposited onto ceria NRs were disproportionally composed of oxidized species (Pt

Palladium-ceria nanocatalyst for hydrogen oxidation in alkaline media: Optimization of the Pd–CeO2 interface

“…The high-resolution Ce 3d photoelectron spectra are shown in Figure 4d-f. Deconvolution of the spectra suggests that the Ce (IV) is the predominate species and fitting with additional Ce (III) species did not result in a better fitting agreement of the experimental curve. The binding energies labeled v, v'', v''' are attributed to spin-orbit coupling of 3d5/2 core electrons and u, u'', u''' are attributed to spin-orbit coupling of 3d3/2 core electrons [49,50]. It is noted that the Ce spectra for Type 2 catralyst require an extra peak at ~880 eV in order for a complete agreement between the fitting envelope and the experimental data.…”

“…It has been hypothesized that ceria promotes the formation of Pd-OH ad species which facilitates ethanol oxidation kinetics [35]. The catalytic activity of Pt nanoparticles towards methanol electrooxidation in alkaline media has been demonstrated to be dependent on their interactions with the nanostructured ceria support [36]. Strong metal-support interactions between Pt and ceria have been postulated to induce preferential oxidation of Pt and consequently decrease the catalytic activity [36].…”

“…The catalytic activity of Pt nanoparticles towards methanol electrooxidation in alkaline media has been demonstrated to be dependent on their interactions with the nanostructured ceria support [36]. Strong metal-support interactions between Pt and ceria have been postulated to induce preferential oxidation of Pt and consequently decrease the catalytic activity [36]. On the other hand, the *Manuscript Click here to view linked References use of CeO 2 in Pd-based electrocatalysts on the anode of H 2 -AEMFC has led a 5-fold improvement of power density compared to the undoped Pd/C [28].…”

Additive‐Free Synthesis of Cerium Oxide Nanorods with Reaction Temperature‐Tunable Aspect Ratios

“…Fluorite‐structured cerium oxide (CeO 2− x , 0 ≤ x < 0.5, ceria) is an important industrial catalyst used in petroleum refining, fuel cells, three‐way catalytic converters, and organic chemical synthesis . As a result of its critical role in many chemical processes, the synthesis of cerium oxide has received intense interest .…”

Palladium-Ceria Nanocatalyst for Hydrogen Oxidation in Alkaline Media: Optimization of the Pd-CeO2 Interface

“…The catalytic activity of Pt nanoparticles towards methanol electrooxidation in alkaline media has been demonstrated to be dependent on their interactions with the nanostructured ceria support [36]. Strong metal-support interactions between Pt and ceria have been postulated to induce preferential oxidation of Pt and consequently decrease the catalytic activity [36]. On the other hand, the *Manuscript Click here to view linked References 2 use of CeO 2 in Pd-based electrocatalysts on the anode of H 2 -AEMFC has led a 5-fold improvement of power density compared to the undoped Pd/C [28].…”