The nanostructure of nitrogen atom linked carbon nanotubes with platinum employed to the electrocatalytic oxygen...

Multi-walled carbon nanotube grafted Pt nanoparticles via nitrogen atom (MWCNT-N-Pt) has chemically synthesized and characterized as an efficient oxygen reduction reaction (ORR) catalysts. Structural and morphological properties of the electrocatalyst have characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) techniques. The electrochemical properties have evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and hydrodynamic voltammetry techniques. The electrochemical properties toward ORR of MWCNT-N-Pt have evaluated in 0.1 mol L(-1) HClO4 aqueous solution. The electrocatalytic reduction of O2 at the MWCNT-N-Pt catalyst establishes a pathway of four-electron transfer reduction into H2O. Hydrodynamic voltammetry reveals that the modified electrode has catalyzed effectively at higher potential. The value of transferred electron number and other kinetic parameters have demonstrated that the MWCNT-N-Pt is highly facilitated than that of bulk Pt to electrocatalytic oxygen reduction with comparatively low Pt content (27.04 Wt%) and higher electrochemical surface area (ESA(Pt)) 94.34 m2 gPt(-1).