English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

MoO3/Al2O3 systems have been prepared by calcining at 770 K alumina impregnated with ammonium heptamolybdate (aq), or by calcining molybdena/alumina mixtures at 770 K. Surface polymolybdates have been observed by laser Raman spectroscopy in samples prepared by impregnation: for calcined MoO3/Al2O3 mixtures, X-ray diffraction indicates MoO3 readily spreading over the alumina surface in the presence of water vapour, and this being almost complete after calcination for 2 h. © 1992 Chapman & Hall.Financial support from CICYT (project MAT88-556) and Junta de Castilla y León (Consejeria de Cultura y Bienestar Social) is greatly acknowledged.Peer Reviewe

Reactivity of MoO3: effect of molybdenum with Al2O3 precursor and the presence of water vapour on the dispersion of the surface phases