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,...