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Metal-Free Single Atom Catalyst for N 2 Fixation Driven by Visible Light

Ling, Chongyi ; Niu, Xianghong ; Li, Qiang ; Du, Aijun ; Wang, Jinlan

Journal of the American Chemical Society, 2018-10, Vol.140 (43), p.14161-14168 [Periódico revisado por pares]

United States

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  • Título:
    Metal-Free Single Atom Catalyst for N 2 Fixation Driven by Visible Light
  • Autor: Ling, Chongyi ; Niu, Xianghong ; Li, Qiang ; Du, Aijun ; Wang, Jinlan
  • É parte de: Journal of the American Chemical Society, 2018-10, Vol.140 (43), p.14161-14168
  • Descrição: Solar nitrogen (N ) fixation is the most attractive way for the sustainable production of ammonia (NH ), but the development of a highly active, long-term stable and low-cost catalyst remains a great challenge. Current research efforts for N reduction mainly focus on the metal-based catalysts using the electrochemical approach, while metal-free or solar-driven catalysts have been rarely explored. Herein, on the basis of a concept of electron "acceptance-donation", a metal-free photocatalyst, namely, boron (B) atom, decorated on the optically active graphitic-carbon nitride (B/g-C N ), for the reduction of N is proposed by using extensive first-principles calculations. Our results reveal that gas phase N can be efficiently reduced into NH on B/g-C N through the enzymatic mechanism with a record low onset potential (0.20 V). Moreover, the B-decorated g-C N can significantly enhance the visible light absorption, rendering them ideal for solar-driven reduction of N . Importantly, the as-designed catalyst is further demonstrated to hold great promise for synthesis due to its extremely high stability. Our work is the first report of metal-free single atom photocatalyst for N reduction, offering cost-effective opportunities for advancing sustainable NH production.
  • Editor: United States
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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