A thermodynamic approach toward selective and reversible sub-ppm H2S sensing using ultra-small CuO nanorods impregnated with Nb2O5 nanoparticles

CuO nanorods impregnated Nb 2 O 5 composites have been thermodynamically designed for facile interfacial charge transfer, which favors CuO sulfidation and oxidation with reversible, selective, and stable sub-ppm H 2 S sensing at a constant temperature.