A NiCo2S4@N/S–CeO2 composite as an electrocatalytic signal amplification label for aptasensing

Herein, we designed a NiCo₂S₄@N/S–CeO₂ composite with amplified electrocatalytic oxygen reduction (OR) capability by the in situ growth of NiCo₂S₄ nanoparticles on CeO₂ nanospheres with simultaneous doping of nitrogen and sulfur.