In article number https://doi.org/10.1002/advs.201900250, Il‐Doo Kim and co‐workers develop ultra‐small and well‐dispersed metal nanoparticles (NPs) embedded in the cavities of conductive metal–organic frameworks (C‐MOFs). The unique porous structure of C‐MOFs inhibits bulk growth of metal NPs, generating highly active and porous conductive materials. The catalytic metal NPs‐loaded C‐MOFs exhibit improved NO2 sensing performance, due to the synergistic effect of catalytic metal NPs and C‐MOFs.

A novel catalyst functionalization method is proposed by I.‐D. Kim and co‐workers using the self‐assembly of protein‐encapsulated catalytic nanoparticles on polystyrene colloid templates. On page 911, these templates are employed in electrospinning to achieve well‐dispersed catalyst functionalization as well as to form open pores on WO3 nanofibers (NFs) after subsequent heat‐treatment. The improved analyte‐sensing performance is investigated with catalyst‐loaded porous WO3 NFs, demonstrating their potential for application in exhaled breath analysis to diagnose diseases.

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