ZnS@MoS2 hollow polyhedrons display outstanding cycling performance and high reversible specific capacity in LIB anodes.

Uniquely structured CoS/N‐doped carbon@MoS2 (denoted as CoS/NC@MoS2) hollow spheres were successfully synthesized by using a well‐designed N‐rich Co‐metal organic framework (ZIF‐67) precursor and template. Owing to the good mechanical stability and conductivity of carbon hollow spheres, N‐doped carbon, and Co−Mo bonds, the as‐prepared CoS/NC@MoS2 composites exhibit outstanding electrochemical performance both in electrocatalytic and energy storage applications. An overpotential of 77 mV at 10 mA cm−2, and a Tafel slope of 67 mV dec−1 could be obtained in acid environment for the hydrogen evolution reaction. As an anode material for lithium‐ion batteries, the as‐prepared composites exhibit good cycling stability with a high reversible specific capacity of 802.4 mA h g−1 at a current density of 1 A g−1 after 400 cycles and good rate capability.

No abstract

Multiple antiviral immunities were developed to defend against viral infection in hosts. RNA interference (RNAi)-based antiviral innate immunity is evolutionarily conserved in eukaryotes and plays a vital role against all types of viruses. During the arms race between the host and virus, many viruses evolve viral suppressors of RNA silencing (VSRs) to inhibit antiviral innate immunity. Here, we reviewed the mechanism at different stages in RNAi-based antiviral innate immunity in plants and the counteractions of various VSRs, mainly upon infection of RNA viruses in model plant Arabidopsis. Some critical challenges in the field were also proposed, and we think that further elucidating conserved antiviral innate immunity may convey a broad spectrum of antiviral strategies to prevent viral diseases in the future.

Cobalt sulfides are good candidate anode materials for lithium ion storage for their high theoretical capacities. However, their electrochemical performance is restricted by their volume change during the cycles, leading to a sharp capacity fading in the subsequent process. To overcome these disadvantages, ultrathin nanosheets assembled hierarchical cobalt sulfides@C hollow spheres are fabricated by a hydrothermal and subsequent carbon enwrapping strategy. The as-prepared hierarchical Co 9 S 8 @C hollow spheres deliver an enhanced electrochemical performance with both long-term cyclability and reversible specific capacities. 823 mA h g −1 reversible capacity could be maintained after 200 cycles at a current density of 100 mA g −1 . More importantly, the present synthesis strategy shows good generality for the synthesis of nickel sulfide and Ni−Co bimetal sulfides hollow spheres with improved performance in anode materials of lithium ion batteries. KEYWORDS: Co/NiS x @C, hierarchical hollow spheres, ultrathin nanosheets, template method, lithium ion batteries