Conductivity studies on silver oxide

Talukdar, Malabika; Baker, E. H.

doi:10.1016/0038-1098(69)90407-4

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…Instead, as light deactivation was observed, which could be attributed to the detachment of the catalyst film or the increase of the resistance by the oxidation of metallic silver. [49] This comparison measurement illustrates that Fe impurities present in the electrolyte are essential for the activation profile of the Ag-Co oxides.O n the other hand, the sample with aC o/Ag (8:1) ratio still showed the highest activity compared with other Ag-Co oxides.Asimilar activity trend was observed from the electrochemical measurements in both Fe-containing and Fe-free KOHe lectrolytes,w ith Co 8 Ag oxide being the most active OER catalyst. Clearly,the addition of Ag is beneficial to the OER activity of spinel Co 3 O 4 ,a ss hown in previous studies where Ag was employed as aconductive additive.…”

Section: Methodsmentioning

confidence: 83%

Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

Moon

Castillo

et al. 2020

Angew Chem Int Ed

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Herein, we show that the performance of mesostructured cobalt oxide electrocatalyst for oxygen evolution reaction (OER) can be significantly enhanced by coupling of silver species. Various analysis techniques including pair distribution function and Rietveld refinement, X‐ray absorption spectroscopy at synchrotron as well as advanced electron microscopy revealed that silver exists as metallic Ag particles and well‐dispersed Ag2O nanoclusters within the mesostructure. The benefits of this synergy are twofold for OER: highly conductive metallic Ag improves the charge transfer ability of the electrocatalysts while ultra‐small Ag2O clusters provide the centers that can uptake Fe impurities from KOH electrolyte and boost the catalytic efficiency of Co–Ag oxides. The current density of mesostructured Co3O4 at 1.7 VRHE is increased from 102 to 211 mA cm−2 with incorporation of silver spices. This work presents the dual role of silver moieties and demonstrates a simple method to increase the OER activity of Co3O4.

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Section: Methodsmentioning

confidence: 83%

Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

Moon

Castillo

et al. 2020

Angew Chem Int Ed

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“…This fact is a result of the sealing of the pore bottoms and walls by Ag2O, which strongly hinders the access of MCM ions to the metallic surface (across the dense AAO sublayer). However, due to the semiconductor properties of Ag2O established by Talukdar et al [80] the formed layer of silver oxide deposits also does not completely hinder the charge diffusion between the sealed pore bottoms and the metallic surface of the substrate. That is why, the exponential multiplier (n) of the CPEdiff element for Al-O-Ag systems does not reach unit, although it is close to this value.…”

Section: Eis Resultsmentioning

confidence: 97%

Evaluation of the electrochemical performance of Ag containing AAO layers after extended exposure to a model corrosive medium

Kozhukharov

Girginov

Kiradzhiyska

et al. 2020

J. Electrochem. Sci. Eng.

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The coating procedure appears to be an indispensable finishing stage in the production of Al based industrial products, engineering facilities and equipment. For this reason, there is an ever-increasing interest towards the elaboration of reliable corrosion protective layers with apparent coverage, adhesion, and barrier properties. In this sense, both the formation of anodized aluminum oxide (AAO) layer and its further modification with silver enable the elaboration of advanced (Al-O-Ag) films with extended beneficial characteristics. The present research activities are aimed at the determination of the corrosion protective properties of electrochemically synthesized Al-O-Ag layers on the technically pure AA1050 alloy. The structures and compositions of the obtained Al-O-Ag layers were characterized by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). The research activities were accomplished by means of two independent electrochemical characterization methods: electrochemical impedance spectroscopy (EIS) and potentiodynamic scanning (PDS). The electrochemical measurements were performed after 24, 168 and 672 hours of exposure to 3.5 % NaCl solution used as a model corrosive medium (MCM), in order to determine the barrier properties and durability of the elaborated Al-O-Ag layers. The analysis of the obtained results has undoubtedly shown that the proposed electrochemical Al-O-Ag layer formation can successfully be used for the creation of self-standing layers with apparent corrosion protective properties. Besides, Al-O-Ag system can be used as a basis for development of efficient protective layers suitable for application in biologically contaminated media.

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“…1 , the electrical resistance−strain curve of I = 0.3 A started to deviate from that collected without an electrical current at ε = ~10%. According to previous studies, oxidation 36 , 37 or electromigration 16 , 17 in the Ag film could be responsible for the loss of electrical conductivity (i.e., the increase of resistance). However, the SEM micrographs and scanning X-ray photoelectron spectroscopy analysis of the tested sample surface, shown in Figs 4 and S3 , revealed no evidence of oxides or electromigration, the latter of which would be indicated by the accumulation of material (hillocks) at the anode and depletion (voids) at the cathode 38 , 39 .…”

Section: Resultsmentioning

confidence: 94%

Self-Heating-Induced Deterioration of Electromechanical Performance in Polymer-Supported Metal Films for Flexible Electronics

Jang

Lee

Kim

et al. 2017

Sci Rep

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The retention of electrical performance under the combined conditions of mechanical strain and an electrical current is essential for flexible electronics. Here, we report that even below the critical current density required for electromigration, the electrical current can significantly deteriorate the electromechanical performance of metal film/polymer substrate systems. This leads to a loss of stretchability, and this effect becomes more severe with increasing strain as well as increasing current. The local increase of electrical resistance in the metal film caused by damage, such as localized deformations, cracks, etc., locally raises the temperature of the test sample via Joule heating. This weakens the deformation resistance of the polymer substrate, accelerating the necking instability, and consequently leading to a rapid loss of electrical conductivity with strain. To minimize such a current-induced deterioration of the polymer-supported metal films, we develop and demonstrate the feasibility of two methods that enhance the deformation resistance of the polymer substrate at elevated temperatures: increasing the thickness of the polymer substrate, and utilizing a polymer substrate with a high glass transition temperature.

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Conductivity studies on silver oxide

Cited by 16 publications

References 5 publications

Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

Evaluation of the electrochemical performance of Ag containing AAO layers after extended exposure to a model corrosive medium

Self-Heating-Induced Deterioration of Electromechanical Performance in Polymer-Supported Metal Films for Flexible Electronics

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