Quantitative correlations between the normal incidence differential reflectance and the coverage of adsorbed bromide on a polycrystalline platinum rotating disk electrode

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Normal incidence reflectance spectra (λ = 635 nm) data were acquired from a Pt disk of a rotating Pt|Pt ring-disk electrode in 0.1 M HClO 4 solutions containing bromide in the μM range, while scanning the disk potential linearly and measuring the diffusion limited bromide oxidation current at the ring. Analysis of the results obtained made it possible to correlate quantitatively the relative intensity of the reflected light, R, with the bromide coverage, i.e. the fraction of the surface covered by bromide, assuming the remaining areas of the Pt disk are covered by adsorbed hydrogen, using empirical functions to account for the potential dependence of the optical signals for each of the two surface regions. This technique opens new prospects for monitoring in real time the coverage of bromide and perhaps other adsorbed species during the course of a faradaic process under well-defined conditions of mass transport control.

Original languageEnglish
Pages (from-to)2795-2801
Number of pages7
JournalAnalytical chemistry
Volume85
Issue number5
DOIs
Publication statusPublished - 2013 Mar 5
Externally publishedYes

Fingerprint

Rotating disks
Platinum
Bromides
Electrodes
Hydrogen
Mass transfer
Scanning
Oxidation
Monitoring

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

@article{cfdef54a533e48c998b4ee2771d3b130,
title = "Quantitative correlations between the normal incidence differential reflectance and the coverage of adsorbed bromide on a polycrystalline platinum rotating disk electrode",
abstract = "Normal incidence reflectance spectra (λ = 635 nm) data were acquired from a Pt disk of a rotating Pt|Pt ring-disk electrode in 0.1 M HClO 4 solutions containing bromide in the μM range, while scanning the disk potential linearly and measuring the diffusion limited bromide oxidation current at the ring. Analysis of the results obtained made it possible to correlate quantitatively the relative intensity of the reflected light, R, with the bromide coverage, i.e. the fraction of the surface covered by bromide, assuming the remaining areas of the Pt disk are covered by adsorbed hydrogen, using empirical functions to account for the potential dependence of the optical signals for each of the two surface regions. This technique opens new prospects for monitoring in real time the coverage of bromide and perhaps other adsorbed species during the course of a faradaic process under well-defined conditions of mass transport control.",
author = "Jing Xu and Scherson, {Daniel Alberto}",
year = "2013",
month = "3",
day = "5",
doi = "10.1021/ac303322c",
language = "English",
volume = "85",
pages = "2795--2801",
journal = "Analytical Chemistry",
issn = "0003-2700",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Quantitative correlations between the normal incidence differential reflectance and the coverage of adsorbed bromide on a polycrystalline platinum rotating disk electrode

AU - Xu, Jing

AU - Scherson, Daniel Alberto

PY - 2013/3/5

Y1 - 2013/3/5

N2 - Normal incidence reflectance spectra (λ = 635 nm) data were acquired from a Pt disk of a rotating Pt|Pt ring-disk electrode in 0.1 M HClO 4 solutions containing bromide in the μM range, while scanning the disk potential linearly and measuring the diffusion limited bromide oxidation current at the ring. Analysis of the results obtained made it possible to correlate quantitatively the relative intensity of the reflected light, R, with the bromide coverage, i.e. the fraction of the surface covered by bromide, assuming the remaining areas of the Pt disk are covered by adsorbed hydrogen, using empirical functions to account for the potential dependence of the optical signals for each of the two surface regions. This technique opens new prospects for monitoring in real time the coverage of bromide and perhaps other adsorbed species during the course of a faradaic process under well-defined conditions of mass transport control.

AB - Normal incidence reflectance spectra (λ = 635 nm) data were acquired from a Pt disk of a rotating Pt|Pt ring-disk electrode in 0.1 M HClO 4 solutions containing bromide in the μM range, while scanning the disk potential linearly and measuring the diffusion limited bromide oxidation current at the ring. Analysis of the results obtained made it possible to correlate quantitatively the relative intensity of the reflected light, R, with the bromide coverage, i.e. the fraction of the surface covered by bromide, assuming the remaining areas of the Pt disk are covered by adsorbed hydrogen, using empirical functions to account for the potential dependence of the optical signals for each of the two surface regions. This technique opens new prospects for monitoring in real time the coverage of bromide and perhaps other adsorbed species during the course of a faradaic process under well-defined conditions of mass transport control.

UR - http://www.scopus.com/inward/record.url?scp=84874586913&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874586913&partnerID=8YFLogxK

U2 - 10.1021/ac303322c

DO - 10.1021/ac303322c

M3 - Article

VL - 85

SP - 2795

EP - 2801

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 5

ER -