Illustrating new understanding of adsorbed water on silica for inducing tetrahedral cobalt(II) for propane dehydrogenation.

ABSTRACT: Highly dispersed metal sites on the surface of silica, achieved from immobilization of metal precursor within hydroxyl groups, has gained increasing attention in the field of heterogeneous catalyst. However, the special role of adsorbed water derived by hydroxyl groups on the silica is generally ignored. Herein, a new understanding of adsorbed water on the formation of highly dispersed tetrahedral Co(II) (T_d-cobalt(II)) sites is illustrated. It is indicated that sufficient adsorbed water induces the transformation of precursor of Co(NO₃)₂ into intermediate of [Co(H₂O)₆]²⁺. Subsequently, [Co(H₂O)₆]²⁺ makes the highly dispersed T_d-cobalt(II) sites to be available during direct H

SUBMITTER: Huang Z 

PROVIDER: S-EPMC9823098 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature