Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Water (Non-)Interaction with MoO3


Bluhm,  Hendrik
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley;
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available

Head, A. R., Gattinoni, C., Trotochaud, L., Yu, Y., Karslıoǧlu, O., Pletincx, S., et al. (2019). Water (Non-)Interaction with MoO3. The Journal of Physical Chemistry C, 123(27), 16836-16842. doi:10.1021/acs.jpcc.9b03822.

Cite as: https://hdl.handle.net/21.11116/0000-0003-DF7B-9
Molybdenum (VI) oxide (MoO3) is used in a number of technical processes, among them gas filtration and heterogeneous catalysis. In these applications, the adsorption and dissociation of water on the surface can influence the chemistry of MoO3 and thus the course of heterogeneous reactions. We use ambient pressure X-ray photoelectron spectroscopy to study the interaction of water with a stoichiometric MoO3 surface and a MoO3 surface that features oxygen defects and hydroxyl groups. The experimental results are supported by density functional theory calculations. We show that on a stoichiometric MoO3(010) surface, where Mo sites are unavailable, water adsorption is strongly disfavored. However, the introduction of surface species which can interact with the lone pairs on the water O atom, e.g. Mo5+ atoms or surface OH groups, promote water adsorption. Dissociation of water is favored at unsaturated Mo sites, i.e. at oxygen vacancies, while water adsorbs molecularly at hydroxyl sites.