Citrate-Stabilized Gold Nanoparticles as High-Performance Electrocatalysts: The Role of Size in the Electroreduction of Oxygen

Abstract

Fuel cells stand out as one of the most promising alternatives for non-sustainable fossil-based economy. Efficient electrocatalysts for the Oxygen Reduction Reaction (ORR) are required for the mass application of fuel cells. Citrate-stabilized gold nanoparticles (AuNPs) are proposed as potential-dependent electrocatalysts for the ORR. AuNPs were synthesized by a green, reproducible and easy scale-up method. After exhaustive characterization, the electrocatalytic activity of the resulting AuNPs was investigated in alkaline media. Static and dynamic

Surface Modification for Promoting Durable, Efficient, and Selective Electrocatalysts

“…A clear core‐size dependency is observed for both onset potentials and kinetic currents. As expected, the smallest (15 nm) nanoparticles give the best electrocatalytic efficiency . In addition, their electrocatalytic efficiency is comparable to those obtained for small Au clusters incorporating organic ligands (Au 55 Cl 6 (PPh 3 ) 12 ) .…”

“…Very recently, the catalytic activity of citrate‐stabilized nanoparticles was examined as a function of their size, ranging from 15 nm to 95 nm . A clear core‐size dependency is observed for both onset potentials and kinetic currents.…”

Isolated Au Atom Anchored on Porous Boron Nitride as a Promising Electrocatalyst for Oxygen Reduction Reaction (ORR): A DFT Study

“…However, the ORR activity of traditional Au-based catalysts is much lower than that of commercial Pt/C. To date, there are several strategies, such as controlling the shape or morphology of Au nanocrystals (Deng et al, 2015; Alba-Molina et al, 2019), alloying Au with foreign metals (Kodama et al, 2016; Xue et al, 2018), or depositing Au nanoparticles on functional substrate supports (Uosaki et al, 2014; Nie et al, 2015; Kobayashi et al, 2016; Ostojic et al, 2018; Peng et al, 2019). Unfortunately, the catalytic activity of these Au nanoparticles catalysts generally has strongly particle size/shape–dependented and the overall efficiency has been rather low because only the local interface atoms are active for catalysis.…”

Ultrastable CoxSiyOz Nanowires by Glancing Angle Deposition with Magnetron Sputtering as Novel Electrocatalyst for Water Oxidation

“…09‐0418), whilst the other ones are characteristic of the ITO substrate (JCPDS Card no. 89‐4597) . Interestingly, the addition of silicon to the layer does not modify the crystal character of the Cobalt, which stays as Co 3 O 4 in all cases, indicating the absence of charge redistribution in the doping structure.…”