Construction of FeNi3 and core–shell structured FeNi3@C microspheres toward broadband electromagnetic wave absorbing

Surface Confinement of FeNiCo Nanoparticles by Bicontinuous Conductive Networks toward Overall Water Splitting

“…After TF coating, no new diffraction peak appeared and the original peak intensity is slightly decreased, demonstrating amorphous nature and uniform encapsulation of the TF layer. Moreover, after carbonization and reduction, the diffraction peaks located at 44.1, 51.7, and 76.1° are in line with metallic Co (JCPDS 89-7093), Ni (JCPDS 89-7128) and Ni 3 Fe alloy (JCPDS 88-1715), and FeNi 3 alloy (JCPDS 38-0419), indicating the almost entirely reduction and formation of trimetal NPs. Furthermore, the Raman spectra of Co­(OH) 2 /CC and Ni­(OH) 2 @Co­(OH) 2 /CC show two peaks located at 514 and 1041 cm –1 after electrodeposition (Figure b), which can be classified as the Co–O vibration peaks of Co­(OH) 2 .…”

“…Moreover, the TEM images also exhibit a set of clear lattice spacings for the trimetal nanoparticles (Figure d–f). The lattice spacings of 0.106, 0.176, and 0.203 nm correspond to (311), (200), and (111) crystal planes of FeNi 3 ; the spacing values of 0.177 and 0.204 nm can be indexed to the (200) and (111) planes of Co metal; while the spacings values of 0.124 and 0.250 nm correspond to the (220) and (110) plane of Ni and Ni 3 Fe, , respectively. Furthermore, the ultrathin graphitic carbon layer with high crystalline degree can be observed at the edge of trimetal nanoparticles, with an interlayer distance of approximately 0.340 nm, corresponding to the typical (002) plane of the carbon .…”

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

“…Common magnetic loss MAMs include magnetic metals (such as Fe, Co, Ni) and their alloys, magnetic oxides, etc. 109 In essence, their high saturation magnetic susceptibility and high magnetic perme-ability are conducive to excellent magnetic loss ability, 110 and as a result, they often have a wide absorption bandwidth. 111 This section aims to give a summarization of the state-of-theart development of the magnetic MAMs.…”

Electromagnetic Absorption by Magnetic Oxide Nanomaterials: A Review

“…When the Z in value is 0, that is, the total reflection phenomenon, electromagnetic wave in the absorbing material surface completely reflected, do not enter the material inside; when Z in and Z 0 equal, the electromagnetic wave does not reflect, completely into the material inside. − For wave-absorbing materials, their impedance matching characteristics and attenuation characteristics are mainly related to their magnetic permeability μ and dielectric constant ε. μ normalr = μ ′ − i μ ″ ε normalr = ε ′ − i ε ″ tan nobreak0em.25em⁡ δ = tan nobreak0em.25em⁡ δ e + tan nobreak0em.25em⁡ δ μ = ε ″ / ε ′ + μ ″ / μ ′ …”