Breaking the lattice match of Pd on Au(111) nanowires: manipulating the island and epitaxial growth pathways to boost the oxygen reduction reactivity

Abstract

It remains a grand challenge to command the island growth mode because a conformal growth is theoretically favorable in which the lattice mismatch between overlayer and substrate is negligible. Herein,...

The Role of Surface Curvature in Electrocatalysts

“…Tang's group successfully controlled the "Volmer-Weber" type and "Frank-van der Merwe" type growth of Pd on Au(111) nanowires by adjusting pH of solution (Figure 8c). [62] The results show that the "Volmer-Weber" mode Au@Pd HNWs shows excellent performance in electrocatalytic ORR (Figure 8d). The spiral one-dimensional structure causes lattice dislocations between Au and Pd and electronic effects accelerate the forward reaction kinetics, which is the main reason for its superior performance.…”

Engineering One-Dimensional AuPd Nanospikes for Efficient Electrocatalytic Nitrogen Fixation

“…In addition, the synergistic effect between Au and Pd elements is also conducive to the improvement of NRR performance. 37,53 Finally, after the cyclic stability testing, AuPd NSs still maintain their original morphology, demonstrating that the 1D structure is beneficial to prevent agglomeration and dissolution and improve the stability of the material.…”

“…However, the synthesis conditions of these methods are complex and even need to be carried out at high temperature. − Therefore, it is desired to find a way to synthesize 1D electrocatalysts with simple and mild reaction conditions. Among various 1D materials, Au NWs have high conductivity based on the anisotropy characteristics, which is conducive to improving the reaction kinetics of the catalyst. − In addition, the high aspect ratio is beneficial to prevent the agglomeration and dissolution of catalysts, thus improving the stability of catalysts. However, the surface of a semplice Au NWs is smooth.…”

l-Lysine derived fabrication of Cu@Ni core–satellite nanoassemblies as efficient non-Pt catalysts for the methanol oxidation reaction

“…32,33 Meanwhile, the core metal could not only work as a regulating agent to tune the electronic state of the satellite metal, but also serve as an inner support to enhance the structural stability. 34 Herein, we reported a novel and facile L-lysine-derived synthesis of Cu@Ni core-satellite nanoassemblies (Cu@Ni CS-NAs) as effective and stable electrocatalysts for the MOR. The formation mechanism involved the preferential formation of the Cu core, with equilibrium of dissolution and precipitation, accompanied by the subsequent selfassembly growth of outer Ni satellites.…”