▎ 摘　　要

Impurities present in the electrolyte often interfere with the electrochemical performance of the electrocatalysts. A robust electrocatalyst can provide corrosion resistance towards the poisoning of contaminants in the electrolyzer. In this present work, N doped graphene and graphene with platinum nanoparticles (NPs) composites (RGO Pt, U-NGO Pt, and A-NGO Pt) have been studied against chloride ion poisoning on the performance of hydrogen evolution reaction (HER) in acidic medium. Effect of chloride ion poisoning has been studied by adding Cl- ion ranging from 0.16 to 0.96 mM in 0.5 M H2SO4 electrolyte solution. Experimental data revealed that the activated N- doped graphene oxide (by KOH at 600 degrees C) and Pt NPs composite imparts the highest Cl- corrosion resistance due to the presence of more pyridinic and pyrrolic groups in the N doped graphene-Pt composite catalyst. Electrochemical studies showed that A-NGO Pt displayed the highest exchange current density (3.20 mA cm(-2)) and it was nearly 1.3 and 7 times higher than that of RGO Pt (2.43 mA cm(-2)) and U-NGO Pt (0.46 mA cm(-2)) respectively. Tafel slope for HER was improved from 35.5 (RGO Pt) to 32.6 mV dec(-1) (A-NGO Pt), indicating that the doping of N in the graphene plays an important role in the improvement of the catalytic activity of A-NGO Pt catalyst. The impedance spectroscopy, chronoamperometry, chronopotentiometry data in presence of 0.96 mM Cl ion concentration, LSV curves, and ECSA values before after chronoamperometry for A-NGO Pt catalyst confirmed that it was a chloride ionresistant, stable and durable electrocatalyst for efficient hydrogen generation by the electrochemical water splitting.