Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (7): 1761-1773.DOI: 10.1016/S1872-2067(21)64001-9

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Photoelectrochemical nitrogen reduction: A step toward achieving sustainable ammonia synthesis

Liqun Wanga,, Xiao Yanb,, Wenping Sic,, Daolan Liud, Xinggang Houa, Dejun Lia,#(), Feng Houc,$(), Shi Xue Doud, Ji Liangc,*()   

  1. aCollege of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China
    bInstitute of Information Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, China
    cKey Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
    dInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW 2522, Australia
  • Received:2021-10-18 Accepted:2021-12-06 Online:2022-07-18 Published:2022-05-20
  • Contact: Dejun Li, Feng Hou, Ji Liang
  • About author:First author contact:

    Contributed equally to this work.

  • Supported by:
    Natural Science Foundation of China(22179093);Natural Science Foundation of China(21905202);Natural Science Foundation of China(22002107);Program for Innovative Research in the University of Tianjin(TD13-5077);Developed and Applied Funding of Tianjin Normal University(135202XK1702);Key Laboratory of Third Generation Semiconductor Materials and Devices, Longgang District(PT2020D003);Guangdong Third Generation Semiconductor Engineering Technology Development Center(2020GCZX007);Shenzhen Institute of Information Technology Grant(SZIIT2021KJ020);Shenzhen Institute of Information Technology Grant(SZIIT2020KJ006);Australian Research Council under the Discovery Project(DP200100365);Australian Research Council under the Discovery Project(DP210102215)

Abstract:

Industrial NH3 production mainly employs the well-known Haber-Bosch (H-B) process, which is associated with significant energy consumption and carbon emissions. Photoelectrochemical nitrogen reduction reaction (PEC-NRR) under ambient conditions is considered a promising alternative to the H-B process and has been attracting increasing attention owing to its associated energy efficiency and environmentally friendly characteristics. The performance of a PEC-NRR system, such as the NH3 yield, selectivity, and stability, is essentially determined by its key component, the photocathode. In this review, the latest progress in the development of photocathode materials employed in PEC-NRR is evaluated. The fundamental mechanisms and essential features required for the PEC-NRR are introduced, followed by a discussion of various types of photocathode materials, such as oxides, sulfides, selenides, black silicon, and black phosphorus. In particular, the PEC-NRR reaction mechanisms associated with these photocathode materials are reviewed in detail. Finally, the present challenges and future opportunities related to the further development of PEC-NRR are also discussed. This review aims to improve the understanding of PEC-NRR photocathode materials while also shedding light on the new concepts and significant innovations in this field.

Key words: Nitrogen reduction, Photoelectrochemistry, Photocathode, Sustainability, Carbon neutrality