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- Title
Efficient Solar-Driven Nitrogen Fixation over Carbon-Tungstic-Acid Hybrids.
- Authors
Li, Xiaoman; Wang, Wenzhong; Jiang, Dong; Sun, Songmei; Zhang, Ling; Sun, Xiang
- Abstract
Ammonia synthesis under mild conditions is of supreme interest. Photocatalytic nitrogen fixation with water at room temperature and atmospheric pressure is an intriguing strategy. However, the efficiency of this method has been far from satisfied for industrialization, mainly due to the sluggish cleavage of the N≡N bond. Herein, we report a carbon-tungstic-acid (WO3⋅H2O) hybrid for the co-optimization of N2 activation as well as subsequent photoinduced protonation. Efficient ammonia evolution reached 205 µmolg-1h-1 over this hybrid under simulated sunlight. Nitrogen temperature-programmed desorption revealed the decisive role of carbon in N2 adsorption. Photoactive WO3⋅H2O guaranteed the supply of electrons and protons for subsequent protonation. The universality of carbon modification for enhancing the N2 reduction was further verified over various photocatalysts, shedding light on future materials design for ideal solar energy utilization.
- Subjects
NITROGEN fixation; CARBON compounds; TUNGSTIC acid; AMMONIA synthesis; SOLAR energy; PROTON transfer reactions; PHOTOACTIVATION
- Publication
Chemistry - A European Journal, 2016, Vol 22, Issue 39, p13819
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201603277