Correlating surface microstructures with reactivity on commercially pure zirconium using scanning electrochemical microscopy and scanning electron microscopy

Nowierski, Catherine; Noël, James J.; Shoesmith, David W.; Ding, Zhifeng

doi:10.1016/j.elecom.2009.04.008

Cited by 33 publications

(26 citation statements)

References 15 publications

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“…The cell held a solution containing 0.9 mM of ferrocenemethanol (Fc) (97%, Aldrich, Mississauga, Ontario), and 0.1 M Na 2 SO 4 (Caledon Laboratories Ltd., Georgetown, Ontario). 52 A schematic of the experimental setup in dark and under light 50 is given in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

“…Scanning electrochemical microscopy (SECM) 31,32 is a useful analysis tool in the area of chemical and biochemical kinetics, [33][34][35][36][37][38] reactivity imaging, [38][39][40][41][42][43] and micrometre scale structuring and reading [44][45][46][47] at various interfaces. While photoelectrochemical systems based on semiconductor electrodes have been investigated for the conversion of solar energy to electricity, photoelectrosynthesis, photoelectrolysis and photocatalysis, 48,49 there are a few reports on the use of SECM steady-state measurements for obtaining reactivity information about processes at an illuminated semiconductor/electrolyte interface (for instance, ref.…”

Section: Introductionmentioning

confidence: 99%

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One-pot electrodeposition, characterization and photoactivity of stoichiometric copper indium gallium diselenide (CIGS) thin films for solar cells

Harati

Jia

Giffard

et al. 2010

Phys. Chem. Chem. Phys.

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Herein we report the one-pot electrodeposition of copper indium gallium diselenide, CuIn(1-x)Ga(x)Se(2) (CIGS), thin films as the p-type semiconductor in an ionic liquid medium consisting of choline chloride/urea eutectic mixture known as Reline. The thin films were characterized by scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman microspectroscopy, and UV-visible spectroscopy. Based on the results of the characterizations, the electrochemical bath recipe was optimized to obtain stoichiometric CIGS films with x between 0.2 and 0.4. The chemical activity and photoreactivity of the optimized CIGS films were found to be uniform using scanning electrochemical microscopy and scanning photoelectrochemical microscopy. Low-cost stoichiometric CIGS thin films in one-pot were successfully fabricated.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-pot electrodeposition, characterization and photoactivity of stoichiometric copper indium gallium diselenide (CIGS) thin films for solar cells

Harati

Jia

Giffard

et al. 2010

Phys. Chem. Chem. Phys.

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“…The simulation geometry is shown in Fig. 1 as a cross-section of the capillary and is similar to previous work on scanning electrochemical microscopy performed by our group [34][35][36]. Briefly, the z-axis constitutes the axis of symmetry and a lengthwise perspective of the capillary.…”

Section: Theorymentioning

confidence: 98%

Hydrophobicity of room temperature ionic liquids assessed by the Galvani potential difference established at micro liquid/liquid interfaces

Stockmann

Ding

2010

Journal of Electroanalytical Chemistry

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“…This is in line with successful SECM methodologies reported on pure Zr, a material of interest for nuclear waste containers due to its high corrosion resistance. 41 Building on our previous work, 40 spatiotemporal tracking of the local flux of dissolved molecular H 2 produced from a corroding AM50 Mg alloy has been measured by SECM in the SG/TC mode, and the microstructural features responsible for the generation of high H 2 fluxes identified by performing 3D SECM imaging on a premapped area of the alloy. The areas responsible for high H 2 fluxes were then assessed by confocal laser scanning microscopy (CLSM) and transmission electron microscopy (TEM).…”

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confidence: 99%

Local Hydrogen Fluxes Correlated to Microstructural Features of a Corroding Sand Cast AM50 Magnesium Alloy

Dauphin‐Ducharme

Asmussen

Tefashe

et al. 2014

J. Electrochem. Soc.

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Successful in situ spatiotemporal tracking of corrosion processes occurring at heterogeneous Mg alloy microstructures was achieved through tandem analyses involving electron and electrochemical microscopies. Through cross-correlation of scanning electron microscopy and scanning electrochemical microscopy images and subsequent analytical transmission electron microscopy, the morphology and chemical composition of microstructural components on the surface of a sand-cast AM50 Mg alloy were related to their respective local evolution of H 2 with micron scale resolution prior to, during and post corrosion. The results confirm that the preferential water reduction sites in the initial stages of corrosion are the Al 8 Mn 5 intermetallics while a β-Mg 17 Al 12 precipitate contaminated with Ni becomes cathodically active at a later stage of corrosion. This approach demonstrates the power of correlative approaches to probe and understand local electrochemical phenomena. Owing to their light weight, high strength-to-weight ratio, good castability and high damping capacity, Mg alloys are ideal candidates for automotive structural components.1-5 The compromise of formability, room temperature ductility and price represent major challenges in commercializing these materials. Importantly, Mg alloys also suffer from poor corrosion resistance in aqueous environments 6-8 and due to their positions in the electrochemical activity series, are highly susceptible to accelerated corrosion rates when in galvanic contact with a more noble material.9 At open circuit, the overall galvanic current is null due to a balance between the anodic and cathodic current densities, while on a microscopic scale, a difference in electrochemical potential is obtained. In Mg alloys, galvanic coupling between microstructural components of the alloy (commonly referred to as microgalvanic coupling) stems from an inherent electrochemical potential difference between the Mg matrix and its secondary phases, [10][11][12] and can be tracked using local scanning probe methods.Local scanning probe techniques such as several modes of scanning electrochemical microscopy (SECM), [13][14][15][16][17][18][19] scanning Kelvin probe force microscopy (SKPFM), 20-22 the scanning vibrating electrode technique (SVET) [23][24][25] and local electrochemical impedance spectroscopy (LEIS) 26 have been used to probe the heterogeneous surfaces of Mg alloys and to assess the electrochemical behavior of the different microstructural constituents responsible for microgalvanic corrosion. Among these techniques, SECM has the ability to quantify electrochemical fluxes in situ with high lateral resolution using a microelectrode (ME). 27 This technique has been successfully applied in corrosion research to provide in situ analyses of pitting corrosion at oxide films, [28][29][30] to assess lateral variations in corrosion kinetics, 31 and to detect defects within coated metal samples. 32The feedback mode of SECM has been employed to probe corroding AM60 15 and AZ31 17 Mg alloys. The incre...

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Correlating surface microstructures with reactivity on commercially pure zirconium using scanning electrochemical microscopy and scanning electron microscopy

Cited by 33 publications

References 15 publications

One-pot electrodeposition, characterization and photoactivity of stoichiometric copper indium gallium diselenide (CIGS) thin films for solar cells

One-pot electrodeposition, characterization and photoactivity of stoichiometric copper indium gallium diselenide (CIGS) thin films for solar cells

Hydrophobicity of room temperature ionic liquids assessed by the Galvani potential difference established at micro liquid/liquid interfaces

Local Hydrogen Fluxes Correlated to Microstructural Features of a Corroding Sand Cast AM50 Magnesium Alloy

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