Abstract
A method is described herein to immobilize dispersed unsupported high area Pt particles (ca. 30 m2 g-1) on the surface of a glassy carbon (GC) disk of a rotating Pt(ring)/GC(disk) electrode (RRDE) assembly, without the use of Nafion® or other additives, allowing electrochemical measurements to be performed under forced convection with only minimal losses of Pt from the surface. Diffusion limiting currents, Ilim, and half-wave potentials for O2 reduction recorded with dispersed Pt/GC electrodes at the highest attainable loadings (ca. 8.3 equivalent Pt monolayers and rotation rates 400≤ ω ≤2500 rpm, were found to be differ only slightly from those observed with a bulk Pt RDE of the same cross sectional area, e.g. Ilim(Pt) ca. 1.06Ilim(Pt/GC), under otherwise identical conditions. In addition, this novel strategy enables in situ surface modification of dispersed Pt particles on the GC disk of the RRDE by ad-atoms and subsequent voltammetric and electrocatalytic characterization for a wide spectrum of redox reactions.
| Original language | English |
|---|---|
| Pages (from-to) | 35-38 |
| Number of pages | 4 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 538-539 |
| DOIs | |
| Publication status | Published - 2002 Dec 13 |
| Externally published | Yes |
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Keywords
- Electrocatalysis
- Oxygen reduction
- Platinum
- Rotating disk electrode
- Selenium
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
- Electrochemistry
Cite this
Electrochemical characterization of unsupported high area platinum dispersed on the surface of a glassy carbon rotating disk electrode in the absence of Nafion® or other additives. / Mo, Yibo; Sarangapani, S.; Le, Anh; Scherson, Daniel Alberto.
In: Journal of Electroanalytical Chemistry, Vol. 538-539, 13.12.2002, p. 35-38.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical characterization of unsupported high area platinum dispersed on the surface of a glassy carbon rotating disk electrode in the absence of Nafion® or other additives
AU - Mo, Yibo
AU - Sarangapani, S.
AU - Le, Anh
AU - Scherson, Daniel Alberto
PY - 2002/12/13
Y1 - 2002/12/13
N2 - A method is described herein to immobilize dispersed unsupported high area Pt particles (ca. 30 m2 g-1) on the surface of a glassy carbon (GC) disk of a rotating Pt(ring)/GC(disk) electrode (RRDE) assembly, without the use of Nafion® or other additives, allowing electrochemical measurements to be performed under forced convection with only minimal losses of Pt from the surface. Diffusion limiting currents, Ilim, and half-wave potentials for O2 reduction recorded with dispersed Pt/GC electrodes at the highest attainable loadings (ca. 8.3 equivalent Pt monolayers and rotation rates 400≤ ω ≤2500 rpm, were found to be differ only slightly from those observed with a bulk Pt RDE of the same cross sectional area, e.g. Ilim(Pt) ca. 1.06Ilim(Pt/GC), under otherwise identical conditions. In addition, this novel strategy enables in situ surface modification of dispersed Pt particles on the GC disk of the RRDE by ad-atoms and subsequent voltammetric and electrocatalytic characterization for a wide spectrum of redox reactions.
AB - A method is described herein to immobilize dispersed unsupported high area Pt particles (ca. 30 m2 g-1) on the surface of a glassy carbon (GC) disk of a rotating Pt(ring)/GC(disk) electrode (RRDE) assembly, without the use of Nafion® or other additives, allowing electrochemical measurements to be performed under forced convection with only minimal losses of Pt from the surface. Diffusion limiting currents, Ilim, and half-wave potentials for O2 reduction recorded with dispersed Pt/GC electrodes at the highest attainable loadings (ca. 8.3 equivalent Pt monolayers and rotation rates 400≤ ω ≤2500 rpm, were found to be differ only slightly from those observed with a bulk Pt RDE of the same cross sectional area, e.g. Ilim(Pt) ca. 1.06Ilim(Pt/GC), under otherwise identical conditions. In addition, this novel strategy enables in situ surface modification of dispersed Pt particles on the GC disk of the RRDE by ad-atoms and subsequent voltammetric and electrocatalytic characterization for a wide spectrum of redox reactions.
KW - Electrocatalysis
KW - Oxygen reduction
KW - Platinum
KW - Rotating disk electrode
KW - Selenium
UR - http://www.scopus.com/inward/record.url?scp=0037073447&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037073447&partnerID=8YFLogxK
U2 - 10.1016/S0022-0728(02)00969-5
DO - 10.1016/S0022-0728(02)00969-5
M3 - Article
AN - SCOPUS:0037073447
VL - 538-539
SP - 35
EP - 38
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
ER -