Impact electrochemistry: colloidal metal sulfide detection by cathodic particle coulometry

Chee Shan Lim, Martin Pumera

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The determination of the size and concentration of colloidal nano and microparticles is of paramount importance to modern nanoscience. Application of the particle collision technique on metal and metal oxide nanoparticles has been intensively explored over the past decade owing to its ability to determine the particle size and concentration via reactions including the inherent oxidation or the reduction of nanoparticles as well as surface reactions catalysed by the nanoparticles. Transition metal dichalcogenide particles were previously quantified using the anodic (oxidative) particle coulometry method. Here we show that cathodic (reductive) particle coulometry can be favorably used for the detection of metal sulfide colloidal particles. The detection of sulfides of cobalt and lead was performed using the particle collision technique in this work. The presence of spikes confirmed the viability of detecting new and larger particles from compounds using reductive (cathodic) potentials. Such an expansion of the impact particle coulometry method will be useful and applicable to the determination of concentration and size of colloidal metal sulfide nanoparticles in general.

Original languageEnglish
Pages (from-to)26997-27000
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume17
Issue number40
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

coulometry
Coulometers
Sulfides
Electrochemistry
electrochemistry
sulfides
Metals
Nanoparticles
metals
nanoparticles
particle collisions
Nanoscience
Surface reactions
Oxides
Transition metals
Particle size
metal particles
microparticles
viability
spikes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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Impact electrochemistry : colloidal metal sulfide detection by cathodic particle coulometry. / Lim, Chee Shan; Pumera, Martin.

In: Physical Chemistry Chemical Physics, Vol. 17, No. 40, 01.01.2015, p. 26997-27000.

Research output: Contribution to journalArticle

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