Congratulations to Shao Wei and the awesome team on their recent publication, which showcases nanoparticle core–shell architectural design as an effective strategy to achieve both high NH4+ selectivity and enhanced stability for sustainable resource recovery.
Published in ACS Nano, this work reports the synthesis of a core-shell CuHCF@NiHCF Prussian blue analogue via a two-step coprecipitation method to address the electrochemical instability of highly NH4+-selective CuHCF. By tuning the NiHCF shell thickness, this study achieved improved cycling stability while preserving the NH4+ selectivity of the CuHCF core. The work further demonstrates that applied voltage modulation can enhance NH4+ selectivity, offering a promising nanostructural engineering strategy to develop stable, highly selective electrosorbents for sustainable resource recovery.