Catalytic NOx removal by single-wall carbon nanotube-supported Rh nanoparticles

► PEG-functionalized SWNTs doped with Rh nanoparticles for catalytic NOx reduction. ► PEG acts as particle attachment and stabilizing agent, and reducing medium. ► Performance evaluation by gravimetric adsorption and a variety of catalytic conditions. ► Enhanced activity and selectivity at lower temperatures, and extended catalyst lifetime.