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/

Global: Zendy Plus annual

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

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The Cu-ZnO catalysts with variable Cu/Zn ratio, between Zn-rich and Cu-rich compositions have been investigated by a combination of electronic and vibrational spectra.  Synthesized catalysts exhibit two d-d transition bands of Cu2+ ions in a distorted octahedral symmetry, at  7600 and 12900 cm-1 (1315 and 775 nm). The effect of structural cations substitution (Zn2+ and Cu2+) on band shifts observed in spectra of the synthetic samples. The observation of two broad features at ~7600 and 12900 cm-1 (1315 and 775 nm) is a strong indication for Zn2+ substitution by Cu2+ ions. The result of multiple bands in the symmetric stretching and bending regions confirms the reduction of symmetry from D3h to C2v/Cs for (CO3)2- ion in aurichalcite. The synthetic aurichalcite may be used as a standard for identification of spectral properties of naturally occurring anhydrous carbonate minerals

Synthesis and spectroscopic characterisation of aurichalcite (Zn,Cu2+)5(CO3)2(OH)6; implications for Cu–ZnO catalyst precursors