scholarly journals Spatially resolved measurement of electrochemical activity and pH distributions in corrosion processes by scanning electrochemical microscopy using antimony microelectrode tips

2011 ◽  
Vol 56 (24) ◽  
pp. 8846-8850 ◽  
Author(s):  
Javier Izquierdo ◽  
Lívia Nagy ◽  
Ágnes Varga ◽  
Juan J. Santana ◽  
Géza Nagy ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Electrochemical Activity ◽  
Spatially Resolved ◽  
Antimony Microelectrode ◽  
Electrochemical Microscopy

scholarly journals Use of Amperometric and Potentiometric Probes in Scanning Electrochemical Microscopy for the Spatially-Resolved Monitoring of Severe Localized Corrosion Sites on Aluminum Alloy 2098-T351

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1132 ◽  
Author(s):  
Rejane M. P. da Silva ◽  
Javier Izquierdo ◽  
Mariana X. Milagre ◽  
Abenchara M. Betancor-Abreu ◽  
Isolda Costa ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Oxygen Depletion ◽  
Localized Corrosion ◽  
Alloy Surface ◽  
Al Alloy ◽  
Spatially Resolved ◽  
Lower Oxygen ◽  
Local Ph ◽  
Electrochemical Microscopy

Amperometric and potentiometric probes were employed for the detection and characterization of reactive sites on the 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemical microscopy (SECM). Firstly, the probe of concept was performed on a model Mg-Al galvanic pair system using SECM in the amperometric and potentiometric operation modes, in order to address the responsiveness of the probes for the characterization of this galvanic pair system. Next, these sensing probes were employed to characterize the 2098-T351 alloy surface immersed in a saline aqueous solution at ambient temperature. The distribution of reactive sites and the local pH changes associated with severe localized corrosion (SLC) on the alloy surface were imaged and subsequently studied. Higher hydrogen evolution, lower oxygen depletion and acidification occurred at the SLC sites developed on the 2098-T351 Al-alloy.

Local electrochemical activity of transition metal dichalcogenides and their heterojunctions on 3D-printed nanocarbon surfaces

Nanoscale ◽  
2021 ◽  
Author(s):  
Katarina A. Novčić ◽  
Christian Iffelsberger ◽  
Siowwoon Ng ◽  
Martin Pumera
Keyword(s):  
Transition Metal ◽  
Electrochemical Performance ◽  
Transition Metal Dichalcogenides ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Activity ◽  
Thermally Activated ◽  
Metal Dichalcogenides ◽  
3D Printed ◽  
Electrochemical Microscopy

MoS2 and WS2 and their heterojunctions are used to modify thermally activated 3D-printed nanocarbon structures. Herein, the local electrochemical performance for HER of the modified structures is demonstrated by scanning electrochemical microscopy.

Application of Scanning Electrochemical Microscopy to Determine Electrochemical Activity of Intermetallics for an Al-Si-Mg Alloy in Chloride Solution

2019 ◽  
Vol 36 (1) ◽  
pp. 291-297
Author(s):  
Aldo Kuri Alférez ◽  
Víctor M. Ugalde-Saldívar ◽  
Julio C. Aguilar Cordero ◽  
Máximo A. Pech Canul ◽  
Martín I. Pech Canul
Keyword(s):  
Chloride Solution ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Activity ◽  
Mg Alloy ◽  
Electrochemical Microscopy

The Alternating Current Scanning Electrochemical Microscopy Characterization of Diatom Cell Activity Affected by Paeonol

2014 ◽  
Vol 707 ◽  
pp. 113-116 ◽  
Author(s):  
Shou Huan Zhao ◽  
Ji Yong Zheng ◽  
Jing Ya Yang ◽  
Cun Guo Lin ◽  
Wei Wang ◽  
...  
Keyword(s):  
Cell Activity ◽  
Scanning Electrochemical Microscopy ◽  
Alternating Current ◽  
Electrochemical Activity ◽  
Chemical Stimulus ◽  
Cellular Activity ◽  
High Frequencies ◽  
Microscopy Characterization ◽  
Electrochemical Microscopy

The alternating current scanning electrochemical microscopy (AC-SECM) is an important method to characterize the electrochemical activity of living cells. In this paper, we apply AC-SECM to measure the electrochemical activity of diatom biofilm. We find that the diatom biofilm presents insulating effect to decrease the current, when the electrode is close to the biofilm. The alternating current impedance of diatom biofilm is overall smaller than that of the bare glass. To investigate the possible effect of chemical stimulus on cellular activity, the diatoms were immersed into paeonol solution (100 μg/mL), and AC-SECM imaging experiments were conducted when immersion time reached 20 h, 25 h and 35 h. The AC measurements performed at high frequencies show that phase angle decreases over time, which preliminarily indicates that the cellular activity of diatoms is affected by paeonol.

scholarly journals Spatially Resolved Detection of a Nanometer-Scale Gap by Scanning Electrochemical Microscopy

2009 ◽  
Vol 81 (12) ◽  
pp. 4788-4791 ◽  
Author(s):  
Eunkyoung Kim ◽  
Jiyeon Kim ◽  
Shigeru Amemiya
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Nanometer Scale ◽  
Spatially Resolved ◽  
Electrochemical Microscopy

Scanning electrochemical microscopy to study the effect of crystallographic orientation on the electrochemical activity of pure copper

2014 ◽  
Vol 116 ◽  
pp. 89-96 ◽  
Author(s):  
E. Martinez-Lombardia ◽  
Y. Gonzalez-Garcia ◽  
L. Lapeire ◽  
I. De Graeve ◽  
K. Verbeken ◽  
...  
Keyword(s):  
Crystallographic Orientation ◽  
Pure Copper ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Activity ◽  
Electrochemical Microscopy
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