Room Temperature Water Splitting at the Surface of Magnetite

  • Parkinson G
  • Novotný Z
  • Jacobson P
 et al. 
  • 9

    Readers

    Mendeley users who have this article in their library.
  • N/A

    Citations

    Citations of this article.

Abstract

An array of surface science measurements has revealed novel water adsorption behavior at the Fe3O4(001) surface. Following room temperature exposure to water, a low coverage of hydrogen atoms is observed, with no associated water hydroxyl group. Mild annealing of the hydrogenated surface leads to desorption of water via abstraction of surface oxygen atoms, leading to a reduction of the surface. These results point to an irreversible splitting of the water molecule. The observed phenomena are discussed in the context of recent DFT calculations ( Mulakaluri, N. ; Pentcheva, R. ; Scheffler, M. J. Phys. Chem. C 2010, 114, 11148 ), which show that the Jahn?Teller distorted surface isolates adsorbed H in a geometry that could kinetically hinder recombinative desorption. In contrast, the adsorption geometry facilitates interaction between water hydroxyl species, which are concluded to leave the surface following a reactive desorption process, possibly via the creation of O2.

Author-supplied keywords

  • fe3o4
  • h2o
  • magnetite
  • splitting
  • water

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Gareth Parkinson

  • Zbyněk Novotný

  • Peter Jacobson

  • Michael Schmid

  • Ulrike Diebold

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free