Highly efficient tetrametallic PtNiCuCo alloy nanoparticles for sensitive detection of hydrogen peroxide

The tetrametallic PtNiCuCo alloy nanoparticles were prepared by a simple and cost-effective solution-based approach and spray deposited on fluorine-doped tin oxide (FTO) substrates to use as a highly sensitive catalyst for hydrogen peroxide (H 2 O 2 ) sensing. The morphological studies revealed that the PtNiCuCo nanoparticles had an average particle size of 5 ± 1 nm. Electrochemical studies showed that PtNiCuCo nanoparticles possess excellent electro-oxidation activity for hydrogen peroxide at 20 mVs −1 scanning rate (vs Ag/AgCl). The wide linear range for hydrogen peroxide (H 2 O 2 ) was obtained from 10μM to 16 mM. The detection limits for H 2 O 2 were 0.16 μM (SNR = 3). The sensitivity of H 2 O 2 was 4367.25 µAmM −1  cm −2 . These results revealed that the prepared nanoparticles could be a potential candidate for H 2 O 2 sensing.