Magnetic flux density-determined oriented attachment growth of FePt nanowires

Abstract

Operating oriented attachment growth (OA-growth) of crystals is one of the keys to fabricating one-dimensional nanostructures with excellent performance. A high magnetic field has been employed to synthesize FePt nanowires...

Regulating the morphology and structures of wet-chemical synthesized L10-FePtMn nanoparticles by applying magnetic fields

“…19,20 Otherwise, as the NPs with high susceptibility are easily magnetized to saturation, the enhancement of magnetic dipole-dipole interaction energy under a magnetic field will facilitate the one-dimensional directional growth or attachment of NPs. [21][22][23] It is no doubt that the magnetic field will play an important role in the migration, growth, and phase transition processes in the wetchemical synthesis of FePt NPs with higher ordering degrees and smaller sizes. However, the normally used magnetic field strength to promote the disorder-order transition of FePt NPs is too high, [16][17][18]24 which is uneconomical to apply in largescale preparation.…”

Synthesis of FeCoNiCuPt high-entropy alloy nanoparticle electrocatalysts with various Pt contents by a solid-state reaction method

“…[1][2][3] The preparation and application of Pt-based binary or ternary alloys have already been widely studied. [1][2][3][4][5][6][7] With the increase in element types in Pt-based alloy catalysts, the high-entropy alloy (HEA) with at least five kinds of elements and an entropy higher than 1.5R has received extensive attention in recent years. [8][9][10][11] Typically, the small-sized FeCoNiCuPt HEA nanoparticle (NP) synthesized by a low-temperature oil phase method presents a very small overpotential of 11 mV, which is only about 13% of commercial Pt/C catalysts, the mass activity for an HER and MOR can be enhanced to achieve 13.20 and 10.37 times higher activity.…”