The surface intermediate (C_2H_5^+ and CH_3C_6H_5^+) and the reactive pathway of nuclear alkylation of toluene with ethylene to para—ethyl toluene over Mg salt and phosphorus acid modified ZSM—5 zeolites have been s...The surface intermediate (C_2H_5^+ and CH_3C_6H_5^+) and the reactive pathway of nuclear alkylation of toluene with ethylene to para—ethyl toluene over Mg salt and phosphorus acid modified ZSM—5 zeolites have been studied by 1R and EPR methods.展开更多
A vacuum heating operation at 623 K on the surfaces of SiO_2-supported promoted ca- talysts makes it possible to reveal the electron transfer from Co and Fe additives to Rh atoms: a Rh catalyst containing 1 % Eh under...A vacuum heating operation at 623 K on the surfaces of SiO_2-supported promoted ca- talysts makes it possible to reveal the electron transfer from Co and Fe additives to Rh atoms: a Rh catalyst containing 1 % Eh under CO exhibits geminal CO IR bands only, while the presence of Co and Fe in promoted Rh catalysts results in linear and bridged CO chemisorp- tions on Rh in connection with their promotion in the selective hydroformylation of propy- lene.展开更多
Over Rh_4(CO)_(?z)-derived Rh/SiO_2 catalyst,atmospheric hydroformylation and hydro- genation of ethylene are suggested to be structure sensitive and structure insensitive,res- pectively.
文摘The surface intermediate (C_2H_5^+ and CH_3C_6H_5^+) and the reactive pathway of nuclear alkylation of toluene with ethylene to para—ethyl toluene over Mg salt and phosphorus acid modified ZSM—5 zeolites have been studied by 1R and EPR methods.
文摘A vacuum heating operation at 623 K on the surfaces of SiO_2-supported promoted ca- talysts makes it possible to reveal the electron transfer from Co and Fe additives to Rh atoms: a Rh catalyst containing 1 % Eh under CO exhibits geminal CO IR bands only, while the presence of Co and Fe in promoted Rh catalysts results in linear and bridged CO chemisorp- tions on Rh in connection with their promotion in the selective hydroformylation of propy- lene.
文摘Over Rh_4(CO)_(?z)-derived Rh/SiO_2 catalyst,atmospheric hydroformylation and hydro- genation of ethylene are suggested to be structure sensitive and structure insensitive,res- pectively.
