Effect of gold oxide incorporation on electrochemical corrosion resistance of diamond-like carbon

Oliveira, Ciliana A. G. S.; Stein, Martha T.; Saito, Eduardo; Vieira, Lucia; Raniero, Leandro; Trava-Airoldi, V.J.; Lobo, Anderson Oliveira; Marciano, Fernanda R.

doi:10.1016/j.diamond.2015.01.009

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…The protection efficiency ( P eff ) was calculated using the Equation (1). Peff=100(1−jcorrjcorr0) where j corr and j corr 0 indicate the corrosion current densities in the presence and absence of the coating, respectively [37,38]. The polarization resistance ( R p ) can be calculated using the Stern-Geary equation [18].…”

Section: Methodsmentioning

confidence: 99%

Atomic Layer Deposited TiO2 and Al2O3 Thin Films as Coatings for Aluminum Food Packaging Application

et al. 2019

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Titanium dioxide (TiO2) and aluminum oxide (Al2O3) coatings have been investigated in a wide range of bio-applications due to their biodegradation and biocompatibility properties, that are key parameters for their use in the food packaging and biomedical devices fields. The present study evaluates and compares the electrochemical behavior of the non-coated, commercial resin-coated, TiO2-coated and Al2O3-coated aluminum in commercial beer electrolyte. For this, TiO2 and Al2O3 thin films were deposited on aluminum (Al) substrates using atomic layer deposition (ALD). The evaluation of the corrosion barrier layer properties was performed by linear sweep voltammetry (LSV) during 10 min and electrochemical impedance spectroscopy (EIS). In addition, profilometry, grazing incidence X-ray diffractometry (GIXRD), scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR) analyses were performed to investigate the physical and chemical properties of the pristine and / or corroded samples. TiO2 and Al2O3 films presented an amorphous structure, a morphology that follows Al substrate surface, and a thickness of around 100 nm. Analysis of LSV data showed that ALD coatings promoted a considerable increase in corrosion barrier efficiency being 86.3% for TiO2-coated Al and 80% for Al2O3-coated Al in comparison with 7.1% of commercial resin-coated Al. This is mainly due to the lower electrochemical porosity, 11.4% for TiO2-coated Al and 20.4% for Al2O3-coated Al in comparison with 96% of the resin-coated Al, i.e. an increase of up to twofold in the protection of Al when coated with TiO2 compared to Al2O3. The EIS results allow us to complement the discussions about the reduced corrosion barrier efficiency of the Al2O3 film for beer electrolyte once SEM and FT-IR analyzes did not show drastic changes in both investigated ALD films after the corrosion assays. The above results indicate that ALD TiO2 and Al2O3 films may be a viable alternative to replace the synthetic resin coatings frequently used in aluminum cans of use in the food industry.

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Section: Methodsmentioning

confidence: 99%

Atomic Layer Deposited TiO2 and Al2O3 Thin Films as Coatings for Aluminum Food Packaging Application

et al. 2019

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“…The DMFC is a subcategory of fuel cells and is considered as one of several promising fuel cell technologies due to its remarkable properties, such as high energy density (4.4 Wh/mL), durability and the low operational temperature (<100 °C) . Diamond has attracted interest recently for fuel cell applications on account of its resistance to electrocorrosion . Platinum is a highly active electrocatalyst anode for the aforementioned fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical aspects of Pt–Cu and Cu modified boron‐doped diamond

Mavrokefalos

Nelson

Poll

et al. 2015

Physica Status Solidi (a)

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The synthesis of boron-doped diamond (BDD) electrodes, decorated with Pt-Cu or pure Cu nanoparticles is described in this study. A two-step electrochemical method involving the electrodeposition of Cu, followed by Pt was used to synthesise the former. The electrochemical activity of the Pt-Cu/BDD electrode was evaluated towards the methanol oxidation and was compared with the catalytic activity of the Pt/BDD electrode itself. Higher current densities and less fouling at Pt-Cu/BDD catalysts during methanol oxidation is seen compared to the Pt alone. Also, a simple and cost effective method to modify BDD electrode using Cu nanoparticles was explored. High sensitivity and current response to glucose oxidation in KOH is observed as well as good reproducibility and stability. Selectivity of the Cu/BDD towards glucose in KOH is observed in the presence of low concentrations of interfering species.

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“…Diamond electrodes can be modified by metal nanoparticles enhancing its sensitivity towards various analytes compared to the unmodified electrode ,. Of note is the resistance of diamond to electrocorrosion, a fact which make it attractive especially in the field of fuel cell . Pt is one of the most effective electrocatalysts and used widely; nevertheless, the high cost as well as its tendency to be poisoned by the reaction intermediates during the ethanol electrooxidation can be prohibitive for future use ,.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mass Activity and Stability of Bimetallic Pd‐Ni Nanoparticles on Boron‐Doped Diamond for Direct Ethanol Fuel Cell Applications

et al. 2017

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In this work, electrochemical deposition of Pd and bimetallic Pd−Ni nanoparticles on an oxygen‐terminated boron‐doped diamond (BDD) substrate is described for use as an electrocatalyst in a direct ethanol fuel cell. A potentiostatic two‐step electrochemical method involving the electrodeposition of Ni nanoparticles on BDD followed by mono‐dispersed Pd nanoparticles was used for the fabrication of a Pd−Ni/BDD electrode. The electrocatalytic activity of the bimetallic Pd−Ni nanoparticles was evaluated in an alkaline solution containing ethanol and compared to that of the Pd nanoparticles alone. The bimetallic Pd−Ni nanoparticles showed 2.4 times higher mass activity than similar systems in the literature as well as stability when operated in alkaline media. The higher electrochemical response towards the electrooxidation of ethanol observed for the bimetallic electrocatalysts was attributed to the synergistic effects of the electron interaction at the interface of the two metals. Chronopotentiometric measurements revealed that Pd is more stable when anchored to the Ni nanoparticles. The optimised loading of mono‐dispersed Pd on a foreign Ni metal as nanoparticles plays a crucial role in achieving a high mass (3.63×106 mA/g) and specific (10.53 mA/cm2) electrocatalytic activity of Pd towards ethanol electrooxidation in alkaline media.

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Effect of gold oxide incorporation on electrochemical corrosion resistance of diamond-like carbon

Cited by 13 publications

References 28 publications

Atomic Layer Deposited TiO2 and Al2O3 Thin Films as Coatings for Aluminum Food Packaging Application

Atomic Layer Deposited TiO2 and Al2O3 Thin Films as Coatings for Aluminum Food Packaging Application

Electrochemical aspects of Pt–Cu and Cu modified boron‐doped diamond

Enhanced Mass Activity and Stability of Bimetallic Pd‐Ni Nanoparticles on Boron‐Doped Diamond for Direct Ethanol Fuel Cell Applications

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