Related Experiment Video
Updated: Jun 28, 2026

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
Published on: June 30, 2019
The platinum-20% rhodium electrode in potentiometry
V T Athavale1, R G Dhaneshwar, D A Sarang
1Analytical Division, Atomic Energy Establishment, Trombay Modular Laboratories, Bombay-14, India.
Abstract:
The performance of a platinum-20% rhodium alloy indicator electrode is studied in a number of potentiometric redox and acid-base titrations and compared with that of the conventional platinum electrode. The potential breaks obtained with the alloy electrode are always smaller than those obtained with the platinum electrode. The end-points are also usually indicated later than the true end-points. The bimetallic electrode system comprising platinum and platinum-rhodium electrodes gives a peak at the correct end-point even with 0.001N concentration titrations, where the ordinary potentiometric systems do not always give good results.
Related Concept Videos
Potentiometry: Types of Electrodes
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
Potentiometry: Overview
Controlled-Potential Coulometry: Electrolytic Methods
The chosen potential ensures...
Electrodeposition
Electrodeposition can...
Electrodes: Overview
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
Standard Electrode Potentials

