A bromide electrolyte for the electrodeposition of platinum and platinum–iridium alloy

Sheela, G.; Pushpavanam, Malathy; Pushpavanam, S.

doi:10.1179/002029605x29410

Cited by 5 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Deposition bath temperature, deposition potential range, agitation of the solution, solute concentration and pH of the plating solution are all examples of process variables that can be adjusted to affect thin film composition, morphology and structure. 12,17 In this work the objective was to identify deposition conditions that would create thin films with desirable characteristics for neurostimulation applications, e.g., sufficient Ir content, good filmsubstrate adhesion integrity and low electrochemical impedance with minimal surface defects.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition and Characterization of Thin-Film Platinum-Iridium Alloys for Biological Interfaces

Petrossians,

Whalen III,

Weiland

et al. 2011

J. Electrochem. Soc.

View full text Add to dashboard Cite

An efficient platinum-iridium thin film alloy electrodeposition method has been evaluated to modify the surface of platinum or gold microelectrodes that are being developed for neural recording and stimulation applications. A large number of electrodeposition process variables have been investigated in terms of how they affected the properties of the electrodeposited films. Three sets of Pt-Ir films of a certain composition were electroplated on gold substrates using a potential cycling technique and characterized using microscopy, elemental analysis, nanoindentation, and electrochemical techniques to evaluate the repeatability of the electrodeposition process. Deposition rates were estimated by determining film mass and thickness as a function of deposition time. The surface morphology of the Pt-Ir films was characterized using scanning electron microscopy (SEM) and the chemical composition was determined using wavelength dispersive spectroscopy (WDS). Nanoindentation measurements showed that the hardness of the electroplated Pt-Ir thin films was nearly 100% higher than that of a Pt foil. The electrochemical properties of the films were evaluated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and compared with those of pure Pt, pure Ir and 80-20% Pt-Ir foils. The final electroplating process resulted in 60-40% Pt-Ir alloys. The film thickness increased with electrodeposition time at a rate of 16.5 nm/min and stable films with up to 500 nm thickness were obtained. Characterization by SEM and EIS revealed that the real surface area of the Pt-Ir films was much larger than that of pure Pt and increased significantly with increasing deposition time.

show abstract

Section: Resultsmentioning

confidence: 99%

Electrodeposition and Characterization of Thin-Film Platinum-Iridium Alloys for Biological Interfaces

Petrossians,

Whalen III,

Weiland

et al. 2011

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the EDX analysis cannot provide information regarding the alloy/non-alloy-stage of the PtIr catalyst, only its elemental composition. The one-step deposition was performed using a binary-alloy electrolyte according to Sheela et al [ 70 ]. The authors demonstrated PtIr catalyst deposition in an alloyed composition by applying PED method [ 70 ].…”

Section: Resultsmentioning

confidence: 99%

“…The one-step deposition was performed using a binary-alloy electrolyte according to Sheela et al [ 70 ]. The authors demonstrated PtIr catalyst deposition in an alloyed composition by applying PED method [ 70 ]. Therefore, it was assumed that a PtIr-alloy may also be present in the electrodes examined in this study.…”

Section: Resultsmentioning

confidence: 99%

Development of a Bifunctional Ti-Based Gas Diffusion Electrode for ORR and OER by One- and Two-Step Pt-Ir Electrodeposition

Cieluch¹,

Podleschny²,

Kazamer³

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

The present paper presents one- and two-step approaches for electrochemical Pt and Ir deposition on a porous Ti-substrate to obtain a bifunctional oxygen electrode. Surface pre-treatment of the fiber-based Ti-substrate with oxalic acid provides an alternative to plasma treatment for partially stripping TiO2 from the electrode surface and roughening the topography. Electrochemical catalyst deposition performed directly onto the pretreated Ti-substrates bypasses unnecessary preparation and processing of catalyst support structures. A single Pt constant potential deposition (CPD), directly followed by pulsed electrodeposition (PED), created nanosized noble agglomerates. Subsequently, Ir was deposited via PED onto the Pt sub-structure to obtain a successively deposited PtIr catalyst layer. For the co-deposition of PtIr, a binary PtIr-alloy electrolyte was used applying PED. Micrographically, areal micro- and nano-scaled Pt sub-structure were observed, supplemented by homogenously distributed, nanosized Ir agglomerates for the successive PtIr deposition. In contrast, the PtIr co-deposition led to spherical, nanosized PtIr agglomerates. The electrochemical ORR and OER activity showed increased hydrogen desorption peaks for the Pt-deposited substrate, as well as broadening and flattening of the hydrogen desorption peaks for PtIr deposited substrates. The anodic kinetic parameters for the prepared electrodes were found to be higher than those of a polished Ir-disc.

show abstract

“…6,7) For protection against this problem, hot-dip aluminizing that protects the surface of stainless steel was developed. Because the corrosion potential of the aluminized layer is relatively lower than that of ferritic stainless steel in terms of general corrosive media, 8) the aluminized layer acts as a sacricial anode and the stainless steel substrate acts as a cathode. As far as the aluminized layer exists, ferritic stainless steel can be protected; therefore, the corrosion resistance of hotdip aluminized ferritic stainless steel against condensed water and de-icing salts is higher than that of bare ferritic stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Electrochemical Acceleration for Actual Corrosion Behavior of Hot-Dip Aluminized Ferritic Stainless Steel in NaCl Solution

et al. 2016

View full text Add to dashboard Cite

The optimal applied potential for the acceleration of the corrosion of hot-dip aluminized ferritic stainless steel in 5 mass% NaCl solution was investigated using electrochemical techniques (open-circuit potential measurement, electrochemical impedance spectroscopy, potentiodynamic-and potentiostatic-polarization tests). The feasibility of the use of the potentiostatic polarization test as a method for the acceleration of actual corrosion behavior was proved by the corrosion potential and the pitting potential of each layer in the potentiodynamic polarization test. The optimal applied potential for the potentiostatic polarization test was selected through comparison of the surface and electrochemical impedance spectroscopy analysis.

show abstract

A bromide electrolyte for the electrodeposition of platinum and platinum–iridium alloy

Cited by 5 publications

References 5 publications

Electrodeposition and Characterization of Thin-Film Platinum-Iridium Alloys for Biological Interfaces

Electrodeposition and Characterization of Thin-Film Platinum-Iridium Alloys for Biological Interfaces

Development of a Bifunctional Ti-Based Gas Diffusion Electrode for ORR and OER by One- and Two-Step Pt-Ir Electrodeposition

Optimization of the Electrochemical Acceleration for Actual Corrosion Behavior of Hot-Dip Aluminized Ferritic Stainless Steel in NaCl Solution

Contact Info

Product

Resources

About