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The amorphous formation ability, thermal properties, crystallization behavior, magnetic properties, resistivity and bending ductility of Fe 84.5- x B 12 P 2 C 1 Cu 0.5 Co x (x = 0, 4, 8) alloys were systematically investigated. It is found that the substitution of Fe by Co promotes the transformation of the as-spun alloys from a completely amorphous structure to an amorphous/nanocrystalline dual-phase structure, which is related to the differences in the interactions between the involved atoms. The saturation magnetization of alloys increases with increasing Co content and can be increased to 1.93 T at x = 8 by heat treatment, but excessive substitution of Co for Fe deteriorates the coercivity and bending ductility due to the pre-existing α-Fe(Co) grains. The resistivity is positively correlated with the disorder of structure, and the as-spun alloy with x = 4 exhibits a high resistivity of 136.2 μΩ cm. As a result, the annealed Fe 80.5 B 12 P 2 C 1 Cu 0.5 Co 4 alloy with excellent soft magnetic properties (M s = 1.81 T, H c = 7.8 A/m) and good bending ductility in combination with high resistivity has potential for application in the field of electronic devices. • The crystallization tendency of alloy is enhanced by the substitution of Fe by Co. • The annealed Co4 alloy exhibits an ultrafine nanocrystalline structure. • Co4 alloy combines excellent soft magnetic properties with high resistivity. • Co0, Co4 Alloys exhibit good bending ductility even when annealing at T x1 -60 K. [ABSTRACT FROM AUTHOR]

In this study, we developed a Cu 0.5 Fe 2.5 S 4 nanocatalyst through facile sulfidation of the Cu-MIL-88B(Fe) precursor to expedite surface Fe(III) reduction and enhance H 2 O 2 activation in the heterogeneous electro-Fenton (HEF). The as-prepared catalyst possesses relatively large specific surface area and uniformly dispersed metal active sites. The Cu 0.5 Fe 2.5 S 4 -catalyzed HEF system allowed complete removal of naproxen with minimal metal leaching, surpassing that of Cu-MIL-88B(Fe) or Fe 3 S 4. Quantitative XPS analysis, electrochemical characterization and density functional theory calculations reveal an electron donor-shuttle regime in which S2- and Cu species serve as the electron donor and shuttle, respectively. The Cu species significantly accelerate the internal electron transfer between S and Fe and mitigate the dissolution of the adjacent iron sites, securing the sustainable reducing capacity. Moreover, Cu 0.5 Fe 2.5 S 4 -based HEF exhibits great practicability for treatment of various organics in urban wastewater. This study opens new avenue for addressing the challenge of sluggish Fe(III)/Fe(II) cycling in HEF. [Display omitted] • Cu 0.5 Fe 2.5 S 4 designed from MOF sulfidation serves as novel HEF catalyst. • S2- provides many electrons to boost the Fe(III)/Fe(II) cycling in HEF. • Cu species acts as the electron shuttle to accelerate the internal electron transfer. • The Cu-doping stabilizes the adjacent iron sites and enhances the •OH production. • The high porosity and dispersibility of Cu 0.5 Fe 2.5 S 4 promote the mass transport in HEF. [ABSTRACT FROM AUTHOR]