نتایج جستجو برای: heteropoly anions supported heteropoly acids polyoxometals solvent

تعداد نتایج: 529627  

Journal: :Catalysts 2022

This study primarily addresses the development of dynamic, selective and economical metal–acid (bifunctional) catalysts for one-pot menthol production by citral hydrogenation. Specifically, various metals such as Pd, Pt, Ni, Cs Sn were doped over alumina support. Additionally, bifunctional composite also prepared with impregnation heteropoly acids Pd precursors Analytical techniques (e.g., BET,...

Journal: :Bulletin of the Chemical Society of Japan 1965

Journal: :Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 2002
S Klokishner J Melsheimer R Ahmad F C Jentoft G Mestl R Schlögl

UV-Vis-NIR diffuse reflectance spectra of heteropoly acids of the type of H4PVMo11O40.xH2O were recorded with improved spectroscopic equipment for different times on helium stream at room temperature. A broad asymmetric absorption band with a maximum at 740-780 nm in the visible range and a shoulder at 900-1000 nm in the near infrared range is identified. With increasing time on stream the inte...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید