Structure-Dependent Dissociation of Water on Cobalt Oxide

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Schwarz M, Faisal F, Mohr S, Hohner C, Werner K, Xu T, Skala T, Tsud N, Prince KC, Matolin V, Lykhach Y, Libuda J
Zeitschrift: Journal of Physical Chemistry Letters
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2018
Band: 9
Heftnummer: 11
Seitenbereich: 2763-2769
ISSN: 1948-7185


Abstract

Understanding the correlation between structure and reactivity of oxide surfaces is vital for the rational design of catalytic materials. In this work, we demonstrate the exceptional degree of structure sensitivity of the water dissociation reaction for one of the most important materials in catalysis and electrocatalysis. We studied H2O on two atomically defined cobalt oxide surfaces, CoO(100) and Co3O4(111). Both surfaces are terminated by O2- and Co2+ in different coordination. By infrared reflection absorption spectroscopy and synchrotron radiation photoelectron spectroscopy we show that H2O adsorbs molecularly on CoO(100), while it dissociates and forms very strongly bound OH and partially dissociated (H2O)(n)(OH)(m) clusters on Co3O4(111). We rationalize this structure dependence by the coordination number of surface Co2+. Our results show that specific well-ordered cobalt oxide surfaces interact very strongly with H2O whereas others do not. We propose that this structure dependence plays a key role in catalysis with cobalt oxide nanomaterials.


FAU-Autoren / FAU-Herausgeber

Faisal, Firas
Lehrstuhl für Physikalische Chemie II
Hohner, Chantal
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Lykhach, Yaroslava
Lehrstuhl für Physikalische Chemie II
Mohr, Susanne
Lehrstuhl für Physikalische Chemie II
Schwarz, Matthias
Lehrstuhl für Physikalische Chemie II
Werner, Kristin
Lehrstuhl für Physikalische Chemie II
Xu, Tao
Lehrstuhl für Physikalische Chemie II


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Autor(en) der externen Einrichtung(en)
Elettra Sincrotrone Trieste S.C.p.A.
Univerzita Karlova v Praze / Charles University in Prague


Zitierweisen

APA:
Schwarz, M., Faisal, F., Mohr, S., Hohner, C., Werner, K., Xu, T.,... Libuda, J. (2018). Structure-Dependent Dissociation of Water on Cobalt Oxide. Journal of Physical Chemistry Letters, 9(11), 2763-2769. https://dx.doi.org/10.1021/acs.jpclett.8b01033

MLA:
Schwarz, Matthias, et al. "Structure-Dependent Dissociation of Water on Cobalt Oxide." Journal of Physical Chemistry Letters 9.11 (2018): 2763-2769.

BibTeX: 

Zuletzt aktualisiert 2019-21-02 um 09:08