Synthesis of Bimetallic PdAg Nanoparticles and Their Electrocatalytic Activity toward Ethanol

Abstract

Palladium-based bimetallic nanoparticles (NPs) have been studied as important electrocatalysts for energy conversion due to their high electrocatalytic performance and the less usage of the noble metal. Herein, well-dispersed PdAg NPs with uniform size were prepared via oil bath accompanied with the hydrothermal method. The variation of the Ag content in PdAg NPs changed the lattice constant of the face-centered cubic alloy nanostructures continuously. The Pd/Ag molar ratio in the PdAg alloy NPs affected their size and catalytic activity toward ethanol electrooxidation. Experimental data showed that PdAg NPs with less Ag content exhibited better electrocatalytic activity and durability than pure Pd NPs owing to both the small size and the synergistic effect. PdAg-acac-4 with the Pd/Ag molar ratio of 4 : 1 in the start system possessed the highest catalytic current density of 2246 mA/mg for the electrooxidation of ethanol. The differences in the morphology and electrocatalytic activity of the as-made PdAg NPs have been discussed and analyzed.

Enhanced electrocatalytic activity of palladium electrocatalysts supported on corncob biochar for ethanol oxidation reaction in alkaline medium

“…This result is further supported by the Tafel plot (Figure 6), which shows that the kinetics of the ethanol oxidation on the Pd/CB900 is faster than Pd/C. In addition, among the synthesized catalyst composites, Pd/CB900 also gave the smallest Pd crystallite size based on the XRD data, which further enhanced its electrocatalytic activity towards ethanol oxidation reaction [46]. Generally, the smaller the particle size, the more surface area and catalytic sites available for reaction.…”

Studies on the Catalytic Properties of Palladium–Niobium Electrocatalysts Supported on Carbon Nano-onions toward Isopropanol and Ethanol Electro-oxidation in an Alkaline Medium

“…The Pd−Nb/CNO electrocatalyst displayed a more intense and negative peak shift (I f ), indicating a more significant amount of adsorbed oxygen species and a more active surface than Pd/CNO and Pd/C electrocatalysts. 79 The mass activity of the Pd−Nb/CNO electrocatalyst was 2676 mA mg Pd −1 , which is more significant than that of Pd/ CNOs, which was 1506 mA mg Pd −1 and that of commercial Pd/C, which was 1034 mA mg Pd −1…”

A comprehensive and critical review of the recent progress in electrocatalysts for the ethanol oxidation reaction

“…The calculated ECSAs of PdAg-acac-1 (112.4 cm 2 mg −1 ), PdAg-acac-2 (259.6 cm 2 mg −1 ), PdAg-acac-4 (486.3 cm 2 mg −1 ), and PdAg-acac-5 (395.2 cm 2 mg −1 ) also proved its stability response. 128 …”