Jump to main content
Jump to site search

Volume 210, 2018
Previous Article Next Article

Hydrogen adsorption on nano-structured platinum electrodes

Author affiliations

Abstract

The “hydrogen region” of platinum is a powerful tool to structurally characterize nanostructured platinum electrodes. In recent years, the understanding of this hydrogen region has improved considerably: on Pt(111) sites, there is indeed only hydrogen adsorption, while on step sites, the hydrogen region involves the replacement of adsorbed hydrogen by adsorbed hydroxyl which interacts with co-adsorbed cations. However, the hydrogen region features an enigmatic and less well-understood “third hydrogen peak”, which develops on oxidatively roughened platinum electrodes as well as on platinum electrodes with a high (110) step density that have been subjected to a high concentration of hydrogen. In this paper, we present evidence that the peak involves surface-adsorbed hydrogen (instead of subsurface hydrogen) on a locally “reconstructed” (110)-type surface site. This site is unstable when the hydrogen is oxidatively removed. The cation sensitivity of the third hydrogen peak appears different from other step-related peaks, suggesting that the chemistry involved may still be subtly different from the other features in the hydrogen region.

Graphical abstract: Hydrogen adsorption on nano-structured platinum electrodes

Back to tab navigation

Publication details

The article was received on 08 Mar 2018, accepted on 27 Mar 2018 and first published on 27 Mar 2018


Article type: Paper
DOI: 10.1039/C8FD00062J
Citation: Faraday Discuss., 2018,210, 301-315
  •   Request permissions

    Hydrogen adsorption on nano-structured platinum electrodes

    O. Diaz-Morales, T. J. P. Hersbach, C. Badan, A. C. Garcia and M. T. M. Koper, Faraday Discuss., 2018, 210, 301
    DOI: 10.1039/C8FD00062J

Search articles by author

Spotlight

Advertisements