Dendritic PdAgPt nanorings with multiple defects for enhanced ethanol oxidation

Construction of Hierarchical PdAgAu Nanorings/MXene–GO Electrocatalysts for Efficient and Ultrastable Hydrogen Evolution Reaction

“…Subsequently, appropriate amount of HAuCl 4 solution was added into the PdAg NDs, resulting in the appearance of a hole in the center of the NDs due to the galvanic replacement (Figure 1a). Galvanic replacement reaction was initiated between Au 3þ and Pd/Ag after the addition of AuCl 4 [33][34][35] As the reduction potential of Pd, Ag, and Au is in the order of Au (1.50 V) > Pd (0.95 V) > Ag (0.80 V), relative to the standard hydrogen electrode under ideal conditions at 25 °C and 1 atm, the introduction of AuCl 4…”

“…Galvanic replacement reaction was initiated between Au 3+ and Pd/Ag after the addition of AuCl 4 − (2Au 3+ + 3Pd = 2Au + 3Pd 2+ , Au 3+ + 3Ag = Au + 3Ag + ). [ 33–35 ] As the reduction potential of Pd, Ag, and Au is in the order of Au (1.50 V) > Pd (0.95 V) > Ag (0.80 V), relative to the standard hydrogen electrode under ideal conditions at 25 °C and 1 atm, the introduction of AuCl 4 − leads to the galvanic replacement reaction between Au 3+ and Pd/Ag. Pd 0 and Ag 0 atoms at the inner plane were initially oxidized and diffused into the solution.…”