PtRu Nanoparticles Deposited by the Sulfite Complex Method on Highly Porous Carbon Xerogels: Effect of the Thermal Treatment

Abstract

Highly porous carbon xerogels (CXGs) were synthesized to be used as support for PtRu nanoparticles. Metal particles were deposited on CXGs by means of the sulfite complex method for the first time. Catalysts so-obtained were submitted to thermal treatment in H 2 , at different temperatures, in order to increase the particle size and thus the intrinsic activity. Physico-chemical characterizations included N 2 physisorption, X-Ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. Highly dispersed alloyed PtRu particles were obtained, with crystal sizes ranging from 1.6 to 2.0 nm. PtRu-catalysts were tested in half-cell for the methanol oxidation reaction (MOR). The resulting thermal treatment was effective in increasing both particle size and catalytic activity toward MOR.

Preparation and characterization of PtIr alloy dendritic nanostructures with superior electrochemical activity and stability in oxygen reduction and ethanol oxidation reactions

“…From the XPS analysis, d-PtIr/C and s-PtIr/C would be expected to improve the electrochemical activity in EOR and ORR in comparison with the Pt NPs due to the high degree of alloying correlated with the highly metallic states of Pt and Ir. [26][27][28][43][44][45]…”

Design and simulation for improved performance via pump‐less direct ethanol fuel cell for mobile application

“…The incorporation of those metals facilitates the EOR by the adsorption of OH-species at substantially at lower region of overpotentials [4][5][6] and hence remove the carbonaceous intermediates where these steps of reaction is known as bifunctional mechanism. [7][8][9] Moreover, these additional metal also can induce electronic effect on the adjacent Pt atoms and hence weaken the adsorption of the carbonaceous species on the Pt surface. 10 Thus far, the findings on the promotion function of Sn and Ru on Pt catalyst towards EOR is still under debate.…”

“…Hence, numerous efforts had been performed to develop various type of multifunctional Pt‐based electrocatalyst and mostly focusing on the incorporation of Ruthenium (Ru) and Tin (Sn). The incorporation of those metals facilitates the EOR by the adsorption of OH‐species at substantially at lower region of overpotentials 4‐6 and hence remove the carbonaceous intermediates where these steps of reaction is known as bifunctional mechanism 7‐9 . Moreover, these additional metal also can induce electronic effect on the adjacent Pt atoms and hence weaken the adsorption of the carbonaceous species on the Pt surface 10 .…”