Synthesis of hydrogen peroxide from H2 and O2 in water and ethanol catalyzed by nanoclustered Pd(0) on silica: strong selectivity enhancement exerted by the addition of ionic liquids.
Hydrogen peroxide (H(2)O(2)) synthesis directly from dioxygen and dihydrogen was carried out using a continuous flow reactor with a Pd catalyst. The effects of ionic liquids on the selectivity to H(2)O(2) were studied on a Pd/SiO(2) catalyst. It was found that the ionic liquid [BMIM][BF(4)] in water or ethanol is quite beneficial to the selectivity to H(2)O(2). Ca. 95% selectivity after 1 h in both solvents and a relatively high selectivity i.e. (about 50% in ethanol and 40% in water) after 5 h reaction have been achieved. On the other hand, a plausible mechanism for the effects of ion liquids on this reaction system was suggested on the basis of the preliminary results.
Li
Ping
P
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
He
Chongheng
C
Campestrini
Sandro
S
Corain
Benedetto
B
Yuan
Weikang
W
Han
Yi-Fan
YF