Copper Nanospheres Self‐Propelled into Continuums of Iron Nanoclusters to Fabricate and Engineer Two‐Dimensional Heterometallic Arrays under an External Magnetic Field

Abstract Controlled dislocation/arrangement metals in a metallic network with nonmagnetic species presents a challenge to fabricate/engineer structured heterometallic compounds. Heterometallic structures have dangling bonds at the shell of neighboring metallic particles, and therefore present a strong strain field in the vicinity of these particles. These structures can be used as a suitable bed with high surface energy to catalyze organic reactions. Here, we show a method for the production of two‐dimensional (2‐D) arrays of Cu nanospheres self‐propelled into continuums of Fe nanoclusters. The synthesis was carried out under magnetic‐field induction (MFI) with adjusting intensity. Electromagnetic (EM) results show that Cu species trapping themselves at the Fe species interface under the influence of magnetic momentum of Fe particles and MFI to rearrange periodic particle arrays of Cu and Fe. The metallic regions in 2‐D composites appear to be efficient catalytic centers in C_sp−S cross‐coupling reactions. The synergistic effect of metallic species is a key support for the high activity of 2‐D Cu/Fe nanocompounds in coupling reactions. Nanocompounds are very stable after multiple reaction cycles.