Communication—Electrochemical Sensor Concept for the Detection of Lead Contamination in Water Utilizing Lead Underpotential Deposition. Issue 2 (1st January 2018)

• Record Type: Journal Article
• Authors: Liu, Xinyu; Venkatraman, Kailash; Akolkar, Rohan
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 2(2018)
• Page Start: B9
• Page End: B11
• Publication Date: 2018-01-01
• Subjects: electrochemical lead sensor -- hydrogen evolution -- underpotential deposition; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0801802jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : A novel electrochemical sensor concept, which enables detection of ppb-levels of Pb 2+ in water, is outlined. The sensor works on the principle of underpotential deposition of Pb onto a Cu electrode followed by measurement of the hydrogen evolution reaction (HER) current on the Pbupd -modified electrode surface. The degree of suppression of the HER current is correlated to the Pbupd coverage, which in turn depends on the Pb 2+ concentration in solution. Feasibility of achieving a detection limit of 10 ppb Pb 2+ in aerated DI water and tap water is demonstrated and the sensing response time is analyzed using diffusion-reaction calculations.