A novel sensor based on P-Ru/NC for sensitive electrochemical detection of H2O2

The reasonable design and construction of electrocatalytic nanomaterial is crucial to improve the performance of non-enzymatic electrochemical sensors. Here, P-Ru/NC nanocomposite was synthesized for boosting electrochemical H2O2 sensing. The anchoring of ruthenium nanoparticles (Ru NP) and the doping of P are achieved by one-step pyrolysis. The synergistic effect between Ru NP and P doping made P-Ru/NC possess larger electrochemical surface area, rich active sites and fast electron transfer rate. The electrochemical results reveal that P-Ru/NC/GCE shows higher electrocatalytic activity toward H2O2 than Ru/NC/GCE and P-NC/GCE. The sensor based on P-Ru/NC can detect H2O2 in a wide range from 0.02 mM to 6.1 mM with a high sensitivity of 544.57 µA·mM−1·cm−2 and a low detection limit (4.41 µM). Therefore, this work demonstrated an effective sensing platform for non-enzymatic detection of H2O2.