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In this work, we comparatively explored the electronic structure and the low-dimensional magnetic interactions of double-perovskite compounds SrCuTeO and SrCuWO through first-principles calculations. The electronic structure calculations indicate that the Cu (3d ) site is the only magnetic active one, whereas Te and W remain in nonmagnetic states with d and d electronic configurations, respectively. The magnetic exchange interactions have been evaluated on the basis of the classical Heisenberg model. Both SrCuTeO and SrCuWO should be strong frustrated 2D magnetism, in excellent agreement with the experimental observations. Nevertheless, the nearest-neighbor antiferromagnetic interaction J plays a determined role in constructing the Néel antiferromagnetic ordering within the square Cu framework of SrCuTeO. While, the next-nearest-neighbor antiferromagnetic interaction J transcends the nearest-neighbor interaction J, establishes the collinear antiferromagnetic ordering in SrCuWO. The discrimination has been explored and analyzed in detail using density of states, charge density as well as spin density analysis.

Here, we present a simple and novel method based on using insulin amyloid¯brils (INSAFs) as sacri¯cial templates for the construction of Pt-Pd nanoparticle chains (Pt-PdNPCs) under mild conditions. By incubating INSAFs in metal salt solution and then reduction, Pt-Pd nanoparticles with an uniform particle size of around 2.5 nm nucleated and grew along the axial direction of INSAFs, and thus formed a long chain structure with length up to several micrometers. The as-prepared Pt-PdNPCs exhibit an improved catalytic activity for lowtemperature CO and methanol oxidation and possess greater CO tolerance compared with the commercial Pt/C catalyst, which makes them promising for a variety of possible catalytic applications.

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PdCu alloy nanowire networks (NNWs) with tunable compositions are synthesized. Electrooxidaton catalytic measurements prove that the as‐prepared PdCu NNWs represent a predominant catalyst for methanol and ethanol electrooxidation reactions in alkaline medium. With increasing copper content, the electrocatalytic activity of the catalytic materials to ethanol and methanol was significantly increased. Pd27Cu73 NNW‐modified electrodes display superior catalytic activity (8300 A gPd−1) toward the ethanol electrooxidation compared to commercial Pd/C‐modified electrodes (700 A gPd−1). PdCu NNWs have great potential as electrocatalysts for fuel cells.