Analysis of the Corrosion Kinetic of Pt/C Catalysts Prepared on Different Carbon Supports Under the “Start-Stop” Cycling

Ni2P Entwined by Graphite Layers as a Low-Pt Electrocatalyst in Acidic Media for Oxygen Reduction

“…The values for 20% Pt/C are 67.9 and 92.1 mV dec –1 , respectively. These results are consistent with the representative values of Tafel slopes for Pt catalysts in reported work ,,, and confirm the similar ORR mechanism on 7.5% Pt-Ni 2 P/GC and 20% Pt/C. A certain difference in Tafel slopes was found.…”

Enhanced PEMFC durability with graphitized carbon black cathode catalyst supports under accelerated stress testing

“…40,41 For single-cell testing, a square wave between 0.9 V and 1.3 V (vs. anode) with a frequency of 1 min per cycle was used to simulate the conditions experienced by a MEA during start-stop operations. 30,31 The AST protocols are shown in Fig. 1.…”

“…Potential undulation during the start-stop protocol can be simulated via potential cycling to accelerate the degradation of the catalyst support within a short period of time. 30,31 To address the above-mentioned stability issues affecting carbon carriers, a lot of effort has been made to improve the inherent properties of ORR catalysts; in these studies, substitution and surface modication and coating are mainly employed. 32,33 Jung et al employed graphitized carbon black and a N-doped graphitic carbon matrix as supports to increase corrosion resistance and to introduce N-modied active sites onto the carbon surface.…”

Platinum-Containing Nanoparticles on N-Doped Carbon Supports as an Advanced Electrocatalyst for the Oxygen Reduction Reaction

“…Argon saturated with acetonitrile vapor at room temperature was passed through a reactor with a carbon support at a temperature of 890 • C with a flow rate of 0.4 cm 3 s −1 for 4 h. To produce a sufficient amount of the modified support, the procedure was repeated several times. The nitrogen on the support surface was previously demonstrated to be mainly present in the form of pyridine and pyrrole [34,39].…”

“…Recent research has shown that nitrogen doping of a carbon support makes it possible to create additional oxygen electroreduction active sites (surface fragments containing nitrogen atoms in pyrrole and pyridine). First of all, this has a positive effect on the activity of platinum-free and platinum-carbon catalysts in alkaline media [34][35][36][37]. The presence of nitrogen-containing groups on the support surface can also improve the uniformity of the platinum nanoparticles' distribution during the wet synthesis of Pt/C catalysts [38].…”