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Highly active, durable, and cost‐effective electrodes for hydrogen evolution reaction (HER) at ultrahigh current densities (≥1 A cm−2) are extremely demanded for industrial high‐rate hydrogen production, but challenging. Here, a robust strongly coupled Ag(S)@NiO/nickel foam (NF) electrode is reported. Taking advantage of millisecond laser direct writing in liquid nitrogen technique, lattice‐matched and coherent interfaces are formed between Ag nanoparticles with stacking faults (denoted by Ag(S)) and NiO nanosheets, leading to strong interfacial electronic coupling, not only promoting H2O adsorption and dissociation on Ni2+ but also enhancing H* adsorption on intrinsically inactive but most electrically conductive Ag. Strong chemical bonding is established at NiO/NF interface, guaranteeing rapid electron transfer and excellent mechanical durability under high‐rate hydrogen evolution. The physicochemically stable electrode achieves record‐low alkaline HER overpotential of 167 and 180 mV at 1 and 1.5 A cm−2, respectively, along with negligible activity decay after 120 h test at ≈1.5 A cm−2, surpassing reported non‐platinum group metal electrocatalysts. [ABSTRACT FROM AUTHOR]

The gut microbiota play an important role in digestion, development, nutritional metabolism and detoxification in insects. The rice stem borer, Chilo suppressalis, is one of the most destructive rice pests and has caused serious economic losses to major rice‐producing areas of China. However, little is known about how its gut microbiota has adapted to different geographical environments. We investigated the gut microbiota of C. suppressalis populations collected from five sites in the typical areas of northern China using 16S rDNA gene sequencing on an Illumina MiSeq platform. In total, 453,853,707 reads and 1650 operational taxonomic units (OTUs) in 25 gut samples of C. suppressalis were obtained. We identified 697 bacterial genera from 30 phyla, and Proteobacteria and Firmicutes were the most dominant phyla. Gut bacterial richness and alpha‐diversity metrics revealed no significant differences among these populations. We detected the highest bacterial diversity in Beizhen, western Liaoning Province. Principal coordinates analysis (PCoA) and clustering analysis (UPGMA) showed no distinct gut microbial community structure of C. suppressalis in these regions. Linear discriminant analysis (LDA) effect size (LEfSe) indicated that the bacterial species exhibited significant differences among the middle, northern and western regions. Finally, PICRUSt analysis demonstrated that microbial functions closely associated with the gut microbiome mainly included membrane transport, amino acid metabolism and carbohydrate metabolism. Accordingly, our study provided important insights into the investigation of insect‐bacteria symbioses and evaluated gut microorganisms as biocontrol agents for this pest and other agricultural lepidopterans. [ABSTRACT FROM AUTHOR]

Antiferroelectrics with antiparallel dipoles are receiving tremendous attention for their technological importance and fundamental interest. However, intrinsic one-dimensional (1D) materials harboring antiferroelectric ordering have rarely been reported despite the promise of novel paradigms for miniaturized and high-density electronics. Herein, based on first- and second-principles calculations, we demonstrate the VOF 3 atomic wire, exfoliated from an experimentally synthesized yet underexplored 1D van der Waals (vdW) bulk, as a new 1D antiferroelectric material. The energetic, thermal, and dynamic stabilities of the nanowire are confirmed theoretically. Moreover, the temperature-dependent phase transitions and double-hysteresis polarization-field loops are computed for the VOF 3 nanowire by constructing the second-principles model. According to the hysteresis loops, high energy densities and efficiencies can be obtained simultaneously at room temperature in the VOF 3 nanowire under moderate applied fields. Our identified 1D atomic wire not only expands the family of antiferroelectricity but also holds potential for novel high-power energy storage nanodevices.