Synthesis of 1,6-hexanediol from HMF over double-layered catalysts of Pd/SiO 2 + Ir–ReO x /SiO 2 in a fixed-bed reactor

1,6-Hexanediol (1,6-HDO) was effectively prepared from 5-hydroxymethylfurfural (HMF) over double-layered catalysts of Pd/SiO 2 + Ir–ReO x /SiO 2 in a fixed-bed reactor.