Efficient photocatalytic reduction of dinitrogen to ammonia on bismuth monoxide quantum dots

Songmei Sun, Qi An, Wenzhong Wang, Ling Zhang, Jianjun Liu, William A. Goddard

    研究成果: ジャーナルへの寄稿学術誌査読

    125 被引用数 (Scopus)

    抄録

    N2 reduction to ammonia by solar light represents a green and sustainable ammonia synthesis approach which helps to suppress the global warming and energy crisis. However, conventional semiconductors usually suffer from low activity or poor stability, largely suppressing the application of this technology. Here, we report that bismuth monoxide (BiO) quantum dots with an average size of 2-5 nm exhibited efficient photocatalytic activity for ammonia synthesis under simulated solar light. A highly efficient ammonia synthesis rate of 1226 μmol g−1 h−1 is achieved without the assistance of any sacrificial agent or co-catalyst, which is about 1000 times higher than that using the traditional Fe-TiO2 photocatalyst. Kinetic analysis reveals that the synergy of three low valence surface Bi(ii) species markedly enhances N2 activation by electron donation, which finally resulted in the highly efficient N2 photoreduction performance. This work will shed light on designing efficient and robust N2 reduction photocatalysts.

    本文言語英語
    ページ(範囲)201-209
    ページ数9
    ジャーナルJournal of Materials Chemistry A
    5
    1
    DOI
    出版ステータス出版済み - 2017

    !!!All Science Journal Classification (ASJC) codes

    • 化学 (全般)
    • 再生可能エネルギー、持続可能性、環境
    • 材料科学(全般)

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