Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

Mikołajczyk, Tomasz; Turemko, Marcin; Pierożyński, Bogusław

doi:10.1515/pjct-2015-0028

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…[22][23][24][25][26][27]. Ethanol electro-oxidation using nickel or its alloys has been widely accepted in fuel cell development.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

Guchhait¹,

Paul²

2018

Port. Electrochim. Acta

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The electrocatalytic property of electrode materials is the key for getting high cell current and low overvoltage of a fuel cell from fuels electro-oxidation. The bridge between laboratory scale fuel cell development and its fully commercialization is the development of inexpensive but energetic electrode materials. The catalytic actions of an electrode substrate are strongly influenced by the morphology and the grain fineness of the deposited materials. The present investigation aims at finding the effect of electrode deposition mode viz. direct current and pulse current coating, to produce an electrodeposited substrate that can deliver the highest current in a direct ethanol fuel cell. Nickel (Ni) is one of such non precious materials which has been produced through electro synthesis by both pulse current (PC) and direct current (DC) coating. It has been found that the morphology of the deposited is highly influenced by the current density, duty cycle, electrolyte chemistry and right selection of deposition potential on the cathodic polarization curve around the Tafel lines. Electrochemical characterization has been done by cyclic voltammetry (CV), chronoamperometry (CA) and potentiodynamic polarization (PD) studies. The substrate of the electrodeposited material has also been characterized by X-Ray Diffraction analysis (XRD), Energy Dispersive X-Ray Analysis (EDXA) and Scanning Electron Microscope (SEM). It has also been found that the electro synthesis by pulse current coating at pre-selected deposition potential, right at the end of Tafel region, at 40 ºC temperature and 150 second deposition time, gives the highest delivering current of ethanol fuel oxidation.Keywords: Direct ethanol fuel cell, inexpensive Ni-electrode, direct and pulse current coating, cyclic voltammetry, XRD, EDXA, SEM.* Corresponding author. E-mail address: sujitguchhait.chem@gmail.com, dr_spaul@yahoo.com S.K. Guchhait & S. Paul / Port. Electrochim. Acta 36 (2018) 293-307 294 IntroductionThe demand for energy is growing every day, due to fast urbanization, fulfillment of our daily needs and the progress of world economy. The energy demand has been mostly fulfilled by conventional energy resources, such as coal, natural gases, etc. However, the energy harvesting from this resources creates a lot of polluting gases, hazardous substances which have a very harmful impact on global environment, leading to health hazardous problems, not acceptable to the governments of developed and developing nations. So, the production of pollution free renewable energy at an economically viable price is a huge challenge to researchers and scientists. A fuel cell, operated with renewable fuels, is such a kind of alternative technology, to produce clean renewable energy [1]. In the fuel cell, fuel is electrochemically oxidized at the electro catalytic anode surface, knocking the electrons from the fuel, and transferring them in the form of current through the electrode and current collector to the external circuit. The energy conversion efficiency, b...

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“…[22][23][24][25][26][27]. Ethanol electro-oxidation using nickel or its alloys has been widely accepted in fuel cell development.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

Guchhait¹,

Paul²

2018

Port. Electrochim. Acta

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Electrodeposition of Ternary BiTePd Nanofilm Electrocatalyst Using Surface-Limited Reaction for Direct Ethanol Fuel Cell

Mkhohlakali

Fuku

Modibedi

et al. 2022

J. Electrochem. Soc.

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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.

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Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

Cited by 2 publications

References 27 publications

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

Electrodeposition of Ternary BiTePd Nanofilm Electrocatalyst Using Surface-Limited Reaction for Direct Ethanol Fuel Cell

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