Photo-oxidation of nitrogen to nitrite using a composite ZnOFe2O3 catalyst

Tennakone, K.; Ileperuma, O.A.; Thaminimulla, C.T.K.; Bandara, Jayasundera

doi:10.1016/1010-6030(92)80010-s

Cited by 14 publications

(8 citation statements)

References 7 publications

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“…Moreover, it occurs at room temperature . In this regard, several semiconductor photocatalysts have been used for conversion of dinitrogen (N 2 ) to NH 3 . − In this semiconductor photocatalytic process, active metal sites were used to capture molecular N 2 and weaken the NN triple bond. Subsequently, the reduction of weakened NN takes place by photo-excited electrons.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Thangudu

Lee

et al. 2021

ACS Sustainable Chem. Eng.

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The conversion of dinitrogen to ammonia is a great challenge today in diverse applications related to the fields of energy, environment, and hydrogen storage. Till date, industrial production of ammonia remains relying on the energy-and capital-intensive Haber−Bosch process. Owing to the large NN triple bond energy (226 kcal/mol), N 2 activation remains as an intriguing and challenging task since years. A biomimetic photochemical approach is believed to be a promising alternative to replace the high-energy-consuming Haber−Bosch process due to its close resemblance to natural nitrogen fixation processes. Herein, we investigate a photo activation and cleavage of dinitrogen on an as-synthesized biomimetic metal (Fe,Mo)-doped mesoporous MCM-41 zeolite catalyst (FM-MCM 41), which offers a good ammonia formation yield, 644.87 μmol h −1 g −1 , with a high external quantum efficiency (QE) of 0.92%@532 nm at room temperature. Remarkably, the resulting QE value of 0.92%@532 nm is the highest efficiency ever reported in the literature on biomimetic catalysts. Moreover, we also proved that our zeolite catalyst shows truly an enzyme-like behavior, as evidenced by the observation of Michaelis− Menten kinetics. This inexpensive, green, and sustainable biomimetic photocatalytic approach is a potential method to drive the difficult catalytic transformation of dinitrogen to ammonia.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Thangudu

Lee

et al. 2021

ACS Sustainable Chem. Eng.

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“…Miyama et al [42] suggested that NH 3 yield of CdS/Pt binary photocatalysts was drastically higher than that of pristine CdS under UV irradiation. CdS/Pt/RuO 2 [33] and Pt/CdS-Ag 2 S/RuO 2 [31] photocatalysts were successively applied to reduce N 2 to NH 3 under visible light. e holes in the valence band trapped the electrons that released from RuO 2 .…”

Section: Metal Sulfide-based Materialsmentioning

confidence: 99%

“…Banergee et al [39] demonstrated that synthetic FeMoS inorganic clusters could reduce N 2 to NH 3 in aqueous media under light, which showed that structural analogues of nitrogenase can be functional to photocatalytic N 2 fixation. Katherine et al [31] reported that cadmium sulfide (CdS) nanocrystals can be used to drive the enzymatic reduction of N 2 to NH 3 by photosensitizing the MoFeprotein of nitrogenase not ATP hydrolysis. Under optimal conditions, the turnover rate was 75 per minute, 63% of the ATP-coupled reaction rate for the nitrogenase complex.…”

Section: Metal Sulfide-based Materialsmentioning

confidence: 99%

Progress of Metal Oxide (Sulfide)-Based Photocatalytic Materials for Reducing Nitrogen to Ammonia

Yang

2018

Journal of Chemistry

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The Haber–Bosch process has been an important approach to produce ammonia for meeting the food need of increasing population and the worldwide need of nitrogenous fertilizers since 1913. However, the traditional ammonia production process is a high energy-consumption process, which usually produces 1 metric ton ammonia with releasing around 1.9 metric tons CO2. Photocatalytic ammonia synthesis under solar light as energy source, an attractive and promising alternative approach, is a very challenging target of reducing fossil energy consumption and environmental pollution. Therefore, photocatalytic ammonia production process would emerge huge opportunities by directly providing nitrogenous fertilizers in a distributed manner as needed in the agricultural fields. In this article, different metal oxide (sulfide)-based photocatalytic materials for reducing nitrogen to ammonia under ambient conditions are reviewed. This review provides insights into the most recent advancements in understanding the photocatalyst materials which are of fundamental significance to photocatalytic nitrogen reduction, including the state-of-the-art, challenges, and prospects in this research field.

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“…[9][10][11][12][13][14][15][16] The theoretical potential for N 2 direct photooxidation into NO is calculated to be 1.26 V vs. normal hydrogen electrode (NHE). 7 The photo-generated holes in many photocatalysts, such as TiO 2, 17, 18 WO 3, 19 and ZnO 20 , meet this requirement. Moreover, the temperature rise would improve the equilibrium concentration of NO owing to the positive standard enthalpy (90.3 kJ mol -1 ) and entropy (12.4 J K -1 mol -1 NO ) of the reaction (N 2(g) + O 2(g) ⇌2NO (g) ).…”

Section: Introductionmentioning

confidence: 99%

Atomically Dispersed Ru-Decorated TiO ₂ Nanosheets for Thermally Assisted Solar-Driven Nitrogen Oxidation into Nitric Oxide

Huang

Wang

et al. 2022

CCS Chem

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Thermal-assisted photo-driven nitrogen oxidation to nitric oxide (NO) by using air as reactants is a promising way to supersede the traditional NO synthesis industry accompanied by huge energy expenditure and greenhouse gas emission. Meanwhile, breaking the N ≡ N triple bond (941 kJ•mol -1 ) in nitrogen is still challenging, and the development of efficient catalysts is highly required. Herein, Ru single atoms decorated TiO 2 nanosheets (Ru SAs/TiO 2 ) were constructed and achieved superior performance for NO photosynthesis with a product rate of 192 μmol g -1 h -1 and a quantum efficiency of 0.77 % at 365 nm. Both 15 N isotope labelling experiments and in situ near ambient pressure X-ray photoelectron spectroscopy (in situ NAP-XPS) proved the origin of NO from N 2 photooxidation. A series of in situ characterizations and theoretical calculations unveiled the reaction pathway of nitrogen photooxidation. Breaking O-O bond to form (N-O) 2 -Ru intermediates was demonstrated as the rate-determining step. Importantly, the single atomic structure was proved to inhibit the aggregation and inactivation of Ru, leading to outstanding durability.

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Photo-oxidation of nitrogen to nitrite using a composite ZnOFe2O3 catalyst

Cited by 14 publications

References 7 publications

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Progress of Metal Oxide (Sulfide)-Based Photocatalytic Materials for Reducing Nitrogen to Ammonia

Atomically Dispersed Ru-Decorated TiO ₂ Nanosheets for Thermally Assisted Solar-Driven Nitrogen Oxidation into Nitric Oxide

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Photo-oxidation of nitrogen to nitrite using a composite ZnOFe2O3 catalyst

Cited by 14 publications

References 7 publications

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Enhanced Photofixation of Dinitrogen to Ammonia over a Biomimetic Metal (Fe,Mo)-Doped Mesoporous MCM-41 Zeolite Catalyst under Ambient Conditions

Progress of Metal Oxide (Sulfide)-Based Photocatalytic Materials for Reducing Nitrogen to Ammonia

Atomically Dispersed Ru-Decorated TiO 2 Nanosheets for Thermally Assisted Solar-Driven Nitrogen Oxidation into Nitric Oxide

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Atomically Dispersed Ru-Decorated TiO ₂ Nanosheets for Thermally Assisted Solar-Driven Nitrogen Oxidation into Nitric Oxide