Open AccessElectrodeposition of Ternary BiTePd Nanofilm Electrocatalyst Using Surface-Limited Reaction for Direct Ethanol Fuel Cell
Author(s) -
Andile Mkhohlakali,
Xolile Fuku,
Remegia M. Modibedi,
Lindiwe Khotseng,
Mkhulu Mathe
Publication year - 2022
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ac645d
Subject(s) - electrocatalyst , ternary operation , dielectric spectroscopy , electrochemistry , bimetallic strip , chemical engineering , electron transfer , chemistry , materials science , analytical chemistry (journal) , electrode , catalysis , organic chemistry , computer science , engineering , programming language
Herein, we report electro-synthesis of BiTePd using electrochemical atomic layer deposition (E-ALD). Scanning electron microscopy, energy-dispersive spectroscopy, atomic force microscopy, and X-ray diffraction were used to characterize Pd-based thin films' surface morphology and structure composition. BiTePd electrocatalyst exhibits higher electrochemical activity, stability and electron transfer kinetics using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The higher peak current and more negative onset potential is observed for ternary (BiTePd) nanofilm electrocatalyst towards ethanol oxidation reaction, according to this order: BiTePd= (1.26 mA; -055 V)> TePd = (0.527 mA; -0.535 V) >BiPd = (0.24 mA; -0.39 V) >Pd (0.13 mA; 0.35 V). Moreover, BiTePd = Rct (2.01kΩ) gave the faster interfacial charge transfer than TePd =2.42 kΩ, BiPd= 3.97 kΩ and Pd = 14 kΩ. BiTePd nanofilm demonstrates promising characteristic features of an active electrocatalyst for a direct ethanol fuel cell.