Year: 2014
Type: article
Abstract: Electrochemical behavior of hydrazine borane (HB) was investigated on gold electrode in 0.5 M LiClO 4 solution in methanol using cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and chronoamperometry.Two irreversible peaks at 164 and 530 mV are attributed to direct electro-oxidation of HB on gold electrode in methanol.Both EIS results and CV data at different scan rates indicate a diffusion controlled electron transfer reaction.Furthermore, the Tafel slope (b = 0.191 V) and charge transfer coefficient (α = 0.69) were obtained for the HB oxidation at the gold/solution interface.A possible ECE (electrochemicalchemical-electrochemical) mechanism is proposed for the irreversible two electron transfer reaction.This mechanism was also confirmed by the results of Nicholson-Shain test.Additionally, diffusion coefficient of HB was found to be 1.6 × 10 -5 cm 2 .s-1 using chronoamperometry.First oxidation peak of HB appears at a lower potential than that of ammonia borane (AB), clearly indicating that HB is a stronger reducing agent as compared to AB in methanol solution.
DOI: 10.1149/2.0211412jes
Authors: Derya Özhava, Ahmet M. Önal, Saim Özkar
Institution: Middle East Technical University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1980043237