Variation of the surface stress-charge coefficient of platinum with electrolyte concentration

R N Viswanath; D Kramer; J Weissmüller

doi:10.1021/la0473759

Variation of the surface stress-charge coefficient of platinum with electrolyte concentration

Langmuir. 2005 May 10;21(10):4604-9. doi: 10.1021/la0473759.

Authors

R N Viswanath¹, D Kramer, J Weissmüller

Affiliation

¹ Forschungszentrum Karlsruhe, Institut für Nanotechnologie, Karlsruhe, Germany.

PMID: 16032878
DOI: 10.1021/la0473759

Abstract

We report an experimental study of the variation of surface stress with surface charge density for nanoporous Pt immersed in aqueous solutions of NaF of various concentration. As the concentration is reduced, we find initially an increase in the magnitude of the surface stress-charge coefficient, followed by saturation at a value of -1.9 V. Since specific adsorption is expected to be reduced as the solution becomes more dilute, the results support the notion that changes in the bonding at the metal surface play a decisive role in determining the change in the surface stress during double-layer charging.