Correlation between surface chemistry and magnetism in iron nanoparticles

Abstract

Amido and hydrides ligands govern stability and magnetic properties of iron nanoparticles: magnetization could be an indicator of reactivity.

In situ study of the evolution of NiFe nanocatalysts in reductive and oxidative environments upon thermal treatments

“…Again, no oxide contribution was detected. This packing is well documented for Fe NPs 24–27 and, to the best of our knowledge, has never been observed for Ni NPs. Given the limited amount of Ni in Ni1Fe9, this result is consistent with the formation of an alloy in which Ni atoms are diluted in the polytetrahedral Fe arrangement.…”

Electronic property of alkoxo‐bridged tetranuclear Fe(II) cluster and CO2 hydrogenation reactivity

“…Sánchez et al 7 showed that multidentate amino/phosphine could support Fe clusters with high nuclearity, such as [( tren L) 2 Fe 8 (PMe 2 Ph) 2 ] n ( n = 0, −1). Coordination environment of each nuclear center in multinuclear clusters determined the physical property of the overall cluster 8 as well as the chemical reactivity of the electronically localized metal site 9,10 …”

“…Coordination environment of each nuclear center in multinuclear clusters determined the physical property of the overall cluster 8 as well as the chemical reactivity of the electronically localized metal site. 9,10 Multinuclear Fe-O moieties are found in the metalloprotein structures such as hemerythrin and ferritin core. 11 The structural relevance with biological systems has motivated syntheses of various cluster structures, featuring butterfly, adamantane-like, and cubane Fe-O cores (Figure 1a).…”