A catalytic reaction over a silver catalyst performed in an unregarded temperature region(473—873 K) with a long catalytic lifetime for the production of methyl formate from methanol was provided as a potential preparing route. The optimal yield of methyl formate(ca. 14.8%) with a selectivity >90% was obtained at about 573 K. Because α-oxygen species and bulk oxygen species coexist in the unregarded temperature region, a synergistic process concerning α-oxygen species and bulk oxygen species was proved over O_α -rich and O_γ-rich samples.
A method of direct synthesis of a novel lamellar vanadium phosphate intercalated with cupric acetylacetonate (Cu(acac) 2-LVPO) is reported. The compound was characterized by XRD, IR, EA and TGA techniques.
It was found that at neutral pH the hydroxylation reaction rate of phenol was accelerated with an increase of the amounts of 1,4 quinone (1,4 BQ). This acceleration was ascribed to the formation of semiquinone from 1,4 BQ. The semiquinone and 1,4 BQ were suggested to play a role of actual oxidant (electron transfer) in the catalytic cycle. With further reaction, most 1,4 BQ was converted into 1,4 hydroquinone (HQ) and the corresponding mechanism was proposed.
