Change search
ReferencesLink to record
Permanent link

Direct link
In Situ Imaging of Cu2O under Reducing Conditions: Formation of Metallic Fronts by Mass Transfer
Show others and affiliations
2013 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 135, no 45, 16781-16784 p.Article in journal (Refereed) Published
Abstract [en]

Active catalytic sites have traditionally been analyzed based on static representations of surface structures and characterization of materials before or after reactions. We show here by a combination of in situ microscopy and spectroscopy techniques that, in the presence of reactants, an oxide catalyst's chemical state and morphology are dynamically modified. The reduction of Cu2O films is studied under ambient pressures (AP) of CO. The use of complementary techniques allows us to identify intermediate surface oxide phases and determine how reaction fronts propagate across the surface by massive mass transfer of Cu atoms released during the reduction of the oxide phase in the presence of CO. High resolution in situ imaging by AP scanning tunneling microscopy (AP-STM) shows that the reduction of the oxide films is initiated at defects both on step edges and the center of oxide terraces.

Place, publisher, year, edition, pages
2013. Vol. 135, no 45, 16781-16784 p.
Keyword [en]
Ambient pressures, Catalytic sites, Complementary techniques, High resolution, In-situ microscopies, Oxide catalysts, Reducing conditions, Static representation
National Category
Physical Chemistry
URN: urn:nbn:se:kth:diva-136420DOI: 10.1021/ja408506yISI: 000327103600010PubMedID: 24168720ScopusID: 2-s2.0-84887641653OAI: diva2:676210
Swedish Research Council, 62360

QC 20131217

Available from: 2013-12-05 Created: 2013-12-05 Last updated: 2016-08-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Soldemo, MarkusWeissenrieder, Jonas
By organisation
Material Physics, MF
In the same journal
Journal of the American Chemical Society
Physical Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 66 hits
ReferencesLink to record
Permanent link

Direct link