Abstract
Localized pH measurements are important in various areas of electrochemistry, from corrosion to bio-electrochemistry and electrocatalysis. Different techniques are available to perform these measurements and offer numerous possibilities in terms of spatial and temporal resolution, sensitivity, and precision. In this brief review we present the recent progress made and summarize the main techniques available for localized pH measurements in electrochemistry such as scanning probe techniques (SECM, SICM, SIET), laser (confocal) fluorescence microscopy, rotating ring-disc electrode (RRDE) voltammetry, and infra-red spectroscopy, among others.
Highlights
The concept of pH as we know it today dates back to 1909 when Sørensen introduced the pH scale as a way to express the concentration of hydrogen ions.[1]
These measurements and offer numerous possibilities in terms of Scanning probe microscopy (SPM) techniques used for pH
Spatial and temporal resolution, sensibility, and precision. In this measurements usually consist of monitoring the electrochemical brief review we present the recent progress made and summarize signal of a miniaturized tip the main techniques available for localized pH measurements in while the tip is moved above a substrate
Summary
Abstract will dictate which of these system properties can be captured by Localized pH measurements are important in various areas the different methods. Different techniques are available to perform 2. Scanning probe techniques: SECM, SICM, and SIET these measurements and offer numerous possibilities in terms of Scanning probe microscopy (SPM) techniques used for pH spatial and temporal resolution, sensibility, and precision. In this measurements usually consist of monitoring the electrochemical brief review we present the recent progress made and summarize signal of a miniaturized tip (ultramicroelectrode or nanoelectrode) the main techniques available for localized pH measurements in while the tip is moved above a substrate. High spatial resolution electrochemistry such as scanning probe techniques (SECM, can be achieved in three dimensions (XYZ) and is limited by the Journal Pre-proof SICM, SIET), laser (confocal) fluorescence microscopy, rotating ring-disc electrode (RRDE) voltammetry, and infra-red spectroscopy, among others
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