Room temperature stable CO x -free H2 production from methanol with magnesium oxide nanophotocatalysts.
- Additional Document Info
- View All
Methanol, which contains 12.6 weight percent hydrogen, is a good hydrogen storage medium because it is a liquid at room temperature. However, by releasing the hydrogen, undesirable CO and/or CO2 byproducts are formed during catalytic fuel reforming. We show that alkaline earth metal oxides, in our case MgO nanocrystals, exhibit stable photocatalytic activity for CO/CO2-free H2 production from liquid methanol at room temperature. The performance of MgO nanocrystals toward methanol dehydrogenation increases with time and approaches ~320 mol g-1 hour-1 after a 2-day photocatalytic reaction. The CO x -free H2 production is attributed to methanol photodecomposition to formaldehyde, photocatalyzed by surface electronic states of unique monodispersed, porous MgO nanocrystals, which were synthesized with a novel facile colloidal chemical strategy. An oxygen plasma treatment allows for the removal of organic surfactants, producing MgO nanocrystals that are well dispersible in methanol.
author list (cited authors)
Liu, Z., Yin, Z., Cox, C., Bosman, M., Qian, X., Li, N. a., ... Nocera, D. G.
complete list of authors
Liu, Zhengqing||Yin, Zongyou||Cox, Casandra||Bosman, Michel||Qian, Xiaofeng||Li, Na||Zhao, Hongyang||Du, Yaping||Li, Ju||Nocera, Daniel G