The role of oxygen and hydroxyl support species on the mechanism of H_2 production in the steam reforming of phenol over metal oxide-supported-Rh and-Fe catalysts

摘要

The aim of this work was to probe/or the first time the back-spillover of labile O and OH species during steam reforming of phenol towards H_2 production over Rh and Fe supported on MgO,Mg-Ce-O and Mg-Ce-Zr-O metal oxides.This was made possible through SSITKA and other transient isotopic experiments(use of D_2O and ~(18)O_2).The size of the active pool of H-containing species(H and/or OH)present under reaction conditions as a function of reaction T and catalyst composition,and deuterium kinetic isotope effects were measured.