Scanning electrochemical microscopy (SECM) study of pH changes at Pt electrode surfaces in Na2So4 solution (pH 4) under potential cycling conditions

1996 ◽  
Vol 92 (20) ◽  
pp. 3791 ◽  
Author(s):  
Yi-Fu Yang ◽  
Guy Denuault
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Potential Cycling ◽  
Solution Ph ◽  
Pt Electrode ◽  
Ph Changes ◽  
Electrode Surfaces ◽  
Electrochemical Microscopy

scholarly journals Scanning Electrochemical Microscopy as a Tool for the Characterization of Dental Erosion

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Pollyana S. Castro ◽  
Alex S. Lima ◽  
Tiago L. Ferreira ◽  
Mauro Bertotti
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Dental Erosion ◽  
Tooth Surface ◽  
Hard Tissue ◽  
Erosion Process ◽  
Irreversible Loss ◽  
Solution Ph ◽  
Ph Values ◽  
Electrochemical Microscopy

When the tooth is exposed to acidic environments, an irreversible loss of dental hard tissue occurs in a process called dental erosion. In this work, the scanning electrochemical microscopy (SECM) was used to probe the consumption of protons at the vicinity of a tooth surface with a platinum microelectrode fixed at −0.5 (V) versus Ag/AgCl/KCl(sat). SECM approach curves were recorded to assess the extent of diffusion in the solution close to the tooth substrate. SECM images clearly demonstrated that the acid erosion process is very fast at solution pH values in the range between 3 and 4.

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.

scholarly journals Simultaneous Intelligent Imaging of Nanoscale Reactivity and Topography by Scanning Electrochemical Microscopy

2021 ◽  
Author(s):  
Dylan T. Jantz ◽  
Ryan J. Balla ◽  
Siao-Han Huang ◽  
Niraja Kurapati ◽  
Shigeru Amemiya ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Electrochemical Microscopy
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