Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor

Tianyan You, Osamu Niwa, Ryoji Kurita, Yuzuru Iwasaki, Katsuyoshi Hayashi, Koji Suzuki, Shigeru Hirono

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We prepared a thin film electrode consisting of a 3.3% atomic concentration of iridium nanoparticles dispersed in graphite-like carbon (Ir-NDC) by a simple RF sputtering method. The film structure was characterized by TEM, XPS and AFM. The TEM results showed that the Ir particles, whose average size was 2 nm, were homogenously dispersed in the carbon matrix. XPS revealed two chemical states of Ir (Ir(0) and Ir(IV)) in the film. The Ir-NDC film electrode exhibited excellent electrocatalytic ability with regard to H2O2 reduction with low atomic concentration compared to the bulk Ir electrode. The effect of L-ascorbic acid can be suppressed due to the reductive detection of hydrogen peroxide. We applied this electrode for enzymatic glutamate detection. At a detection potential of -0.15 V (vs. Ag/AgCl), we could measure the concentration of glutamate without interferences from ascorbic acid and oxygen.

Original languageEnglish
Pages (from-to)54-59
Number of pages6
JournalElectroanalysis
Volume16
Issue number1-2
Publication statusPublished - 2004 Jan

Fingerprint

Enzyme sensors
Iridium
Carbon films
Glutamic Acid
Nanoparticles
Electrodes
Ascorbic acid
Ascorbic Acid
Carbon
X ray photoelectron spectroscopy
Transmission electron microscopy
Graphite
Hydrogen peroxide
Hydrogen Peroxide
Sputtering
Oxygen
Thin films

Keywords

  • Electrocatalytic
  • Graphite-like carbon
  • Iridium nanoparticles
  • RF sputtering

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

You, T., Niwa, O., Kurita, R., Iwasaki, Y., Hayashi, K., Suzuki, K., & Hirono, S. (2004). Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor. Electroanalysis, 16(1-2), 54-59.

Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor. / You, Tianyan; Niwa, Osamu; Kurita, Ryoji; Iwasaki, Yuzuru; Hayashi, Katsuyoshi; Suzuki, Koji; Hirono, Shigeru.

In: Electroanalysis, Vol. 16, No. 1-2, 01.2004, p. 54-59.

Research output: Contribution to journalArticle

You, T, Niwa, O, Kurita, R, Iwasaki, Y, Hayashi, K, Suzuki, K & Hirono, S 2004, 'Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor', Electroanalysis, vol. 16, no. 1-2, pp. 54-59.
You T, Niwa O, Kurita R, Iwasaki Y, Hayashi K, Suzuki K et al. Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor. Electroanalysis. 2004 Jan;16(1-2):54-59.
You, Tianyan ; Niwa, Osamu ; Kurita, Ryoji ; Iwasaki, Yuzuru ; Hayashi, Katsuyoshi ; Suzuki, Koji ; Hirono, Shigeru. / Reductive H2O2 Detection at Nanoparticle Iridium/Carbon Film Electrode and Its Application as L-Glutamate Enzyme Sensor. In: Electroanalysis. 2004 ; Vol. 16, No. 1-2. pp. 54-59.
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