Photobiocatalytic conversion of solar energy to NH3 from N2 and H2O under ambient condition

Nuttavut Kosem; Xiao feng Shen; Yutaka Ohsaki; Motonori Watanabe; Jun Tae Song; Tatsumi Ishihara

doi:10.1016/j.apcatb.2023.123431

Photobiocatalytic conversion of solar energy to NH₃ from N₂ and H₂O under ambient condition

Nuttavut Kosem, Xiao feng Shen, Yutaka Ohsaki, Motonori Watanabe, Jun Tae Song, Tatsumi Ishihara

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

NH₃ is an important chemical fertilizer and expecting as H₂ carrier. Several methods have been investigated for eco-friendly NH₃ production under mild conditions instead of Haber-Bosch process using 400 °C, 20 MPa. Here, cyanobacterial Anabaena variabilis was utilized as a nitrogenase-producing biocatalyst that converts N₂/H₂O to NH₃ under ambient conditions. Biocatalytic reactions revealed that MV^•+ can penetrate cell membrane and transfer electrons generated in inorganic photocatalyst. We first reported photobiocatalytic NH₃ production of cyanobacteria and TiO₂. Comparing with natural system, NH₃ formation rate of the hybrid system increased 81.3 times with an initial rate of 2031.7 nmol·h⁻¹ and turnover number of 216.8.

Original language	English
Article number	123431
Journal	Applied Catalysis B: Environmental
Volume	342
DOIs	https://doi.org/10.1016/j.apcatb.2023.123431
Publication status	Published - Mar 2024

All Science Journal Classification (ASJC) codes

Catalysis
General Environmental Science
Process Chemistry and Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apcatb.2023.123431

Cite this

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title = "Photobiocatalytic conversion of solar energy to NH3 from N2 and H2O under ambient condition",

abstract = "NH3 is an important chemical fertilizer and expecting as H2 carrier. Several methods have been investigated for eco-friendly NH3 production under mild conditions instead of Haber-Bosch process using 400 °C, 20 MPa. Here, cyanobacterial Anabaena variabilis was utilized as a nitrogenase-producing biocatalyst that converts N2/H2O to NH3 under ambient conditions. Biocatalytic reactions revealed that MV•+ can penetrate cell membrane and transfer electrons generated in inorganic photocatalyst. We first reported photobiocatalytic NH3 production of cyanobacteria and TiO2. Comparing with natural system, NH3 formation rate of the hybrid system increased 81.3 times with an initial rate of 2031.7 nmol·h−1 and turnover number of 216.8.",

author = "Nuttavut Kosem and Shen, {Xiao feng} and Yutaka Ohsaki and Motonori Watanabe and Song, {Jun Tae} and Tatsumi Ishihara",

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T1 - Photobiocatalytic conversion of solar energy to NH3 from N2 and H2O under ambient condition

AU - Kosem, Nuttavut

AU - Shen, Xiao feng

AU - Ohsaki, Yutaka

AU - Watanabe, Motonori

AU - Song, Jun Tae

AU - Ishihara, Tatsumi

PY - 2024/3

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AB - NH3 is an important chemical fertilizer and expecting as H2 carrier. Several methods have been investigated for eco-friendly NH3 production under mild conditions instead of Haber-Bosch process using 400 °C, 20 MPa. Here, cyanobacterial Anabaena variabilis was utilized as a nitrogenase-producing biocatalyst that converts N2/H2O to NH3 under ambient conditions. Biocatalytic reactions revealed that MV•+ can penetrate cell membrane and transfer electrons generated in inorganic photocatalyst. We first reported photobiocatalytic NH3 production of cyanobacteria and TiO2. Comparing with natural system, NH3 formation rate of the hybrid system increased 81.3 times with an initial rate of 2031.7 nmol·h−1 and turnover number of 216.8.

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