Efficient Solar‐Driven Nitrogen Fixation over Carbon–Tungstic‐Acid Hybrids

Chemistry - A European Journal - Tập 22 Số 39 - Trang 13819-13822 - 2016
Xiaoman Li1, Wenzhong Wang1, Dong Jiang1, Songmei Sun1, Ling Zhang1, Xiang Sun1
1Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P.R. China

Tóm tắt

AbstractAmmonia 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 μmol g−1 h−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.

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Chemistry - A European Journal

Tập 22 Số 39

13819-13822

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