(179b) Synthesis of Core-Shell Palladium Nanowires@ZIF-8 for Hydrogen Sensors

Core-shell palladium nanowires@ZIF-8 nanostructures were prepared by dispersing the palladium nanowires in ethanol and growing a shell structure of ZIF-8 over them. The synthesized core-shell structure was vacuum dried and calcined in an inert atmosphere to remove PVP on the surface. The structure had a BET surface area exceeding 600 m²/g and was thermally stable to at least 350 Ö¯ C. A hydrogen sensor was fabricated from the core-shell composite material and tested. The high aspect ratio palladium nanowire core improves response time and room temperature operation whereas the outer shell of ZIF-8 may enhance selectivity and poisoning resistance by sieving larger reactive gas molecules like oxygen, methane, and other interferents.