Electrooxidation of 1-Propanol on carbon nanotube supported Au@PtBi anode catalyst under alkaline condition

Abstract

Herein, Pt and Bi catalysts are prepared via NaBH4 reduction method by using carbon nanotube (CNT) as support material. Electrocatalytic performance of catalysts for 1-propanol electrooxidation are investigated with cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements. Au metal is electrodeposited on PtBi/CNT catalyst surface to increase catalytic activity. Specific activities of PtBi/CNT and Au@PtBi/CNT catalysts are obtained as 4.317 mA/cm2 and 11.517 mA/cm2, respectively. X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), transmission electron microscopy (TEM), and inductively coupled plasma-mass spectrometry (ICP-MS) analytical techniques are performed to determine characterization of synthesized catalysts. The analysis results confirm that the Au metal is successfully doped onto the catalyst surface. Consequently, Au@PtBi/CNT catalyst can be an alternative anode catalyst for 1-propanol oxidation.