Photoassisted catalytic dissociation of water and reduction of nitrogen to ammonia on partially reduced ferric oxide

Khader, Mahmoud M.; Lichtin, Norman N.; Vurens, G.H.; Salmeron, Miguel.; Somorjai, Gábor A.

doi:10.1021/la00074a028

Cited by 78 publications

(38 citation statements)

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“…Schrauzer and Guth and co‐workers first reported that TiO 2 ‐based photocatalysts were capable of driving nitrogen fixation . Subsequently, various semiconductors including Fe 2 O 3 , WO 3 , BiOBr, and others have been investigated in relation to their N 2 fixation performance under visible light . In addition, various biomolecules (such as [Fe–Fe] nitrogenase and CdS:MoFe proteins) have also been explored for N 2 fixation.…”

Section: Methodsmentioning

confidence: 99%

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

et al. 2019

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Dinitrogen reduction to ammonia using transition metal catalysts is central to both the chemical industry and the Earth's nitrogen cycle. In the Haber–Bosch process, a metallic iron catalyst and high temperatures (400 °C) and pressures (200 atm) are necessary to activate and cleave NN bonds, motivating the search for alternative catalysts that can transform N2 to NH3 under far milder reaction conditions. Here, the successful hydrothermal synthesis of ultrathin TiO2 nanosheets with an abundance of oxygen vacancies and intrinsic compressive strain, achieved through a facile copper‐doping strategy, is reported. These defect‐rich ultrathin anatase nanosheets exhibit remarkable and stable performance for photocatalytic reduction of N2 to NH3 in water, exhibiting photoactivity up to 700 nm. The oxygen vacancies and strain effect allow strong chemisorption and activation of molecular N2 and water, resulting in unusually high rates of NH3 evolution under visible‐light irradiation. Therefore, this study offers a promising and sustainable route for the fixation of atmospheric N2 using solar energy.

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Section: Methodsmentioning

confidence: 99%

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

et al. 2019

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“…H 2 evolution was notably inhibited in N 2 atmosphere, whereas iron doping enhanced the photocatalytic reactivity. Since then, titania has been intensively explored as the photocatalyst for N 2 fixation, although other metal oxide semiconductors, such as tungsten oxide [126] and iron oxide [127], were also investigated. Ranjit et al [128] studied photocatalytic reduction of N 2 to NH 3 on noble-metal-loaded TiO 2 .…”

Section: Titania-based Photocatalystsmentioning

confidence: 99%

Alternative Strategies Toward Sustainable Ammonia Synthesis

Wang

Gong

2020

Trans. Tianjin Univ.

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As one of the world's most produced chemicals, ammonia (NH 3 ) is synthesized by Haber-Bosch process. This century-old industry nourishes billions of people and promotes social and economic development. In the meantime, 3%-5% of the world's natural gas and 1%-2% of the world's energy reserves are consumed, releasing millions of tons of carbon dioxide annually to the atmosphere. The urgency of replacing fossil fuels and mitigating climate change motivates us to progress toward more sustainable methods for N 2 reduction reaction based on clean energy. Herein, we overview the emerging advancement for sustainable N 2 fixation under mild conditions, which include electrochemical, photo-, plasma-enabled and homogeneous molecular NH 3 productions. We focus on NH 3 generation by electrocatalysts and photocatalysts. We clarify the features and progress of each kind of NH 3 synthesis process and provide promising strategies to further promote sustainable ammonia production and construct state-of-the-art catalytic systems.

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“…Therefore, NH 3 must be removed immediately from the reaction site to maintain catalytic efficiency. Khader et al successfully prepared a mixture of α-Fe 2 O 3 and Fe 3 O 4 , which was effective in photo-reduction of nitrogen for about 580 h [35]. Interestingly, in the existence of 5 at% iron in the form of Fe 2+ in the partially reduced Fe 2 O 3 , NH 3 was detected in an aqueous slurry of the catalyst under UV illumination.…”

Section: Iron Active Sitesmentioning

confidence: 99%

Insights into the Recent Progress and Advanced Materials for Photocatalytic Nitrogen Fixation for Ammonia (NH3) Production

Sakar

2018

Catalysts

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Ammonia (NH3) is one of the key agricultural fertilizers and to date, industries are using the conventional Haber-Bosh process for the synthesis of NH3 which requires high temperature and energy. To overcome such challenges and to find a sustainable alternative process, researchers are focusing on the photocatalytic nitrogen fixation process. Recently, the effective utilization of sunlight has been proposed via photocatalytic water splitting for producing green energy resource, hydrogen. Inspired by this phenomenon, the production of ammonia via nitrogen, water and sunlight has been attracted many efforts. Photocatalytic N2 fixation presents a green and sustainable ammonia synthesis pathway. Currently, the strategies for development of efficient photocatalyst for nitrogen fixation is primarily concentrated on creating active sites or loading transition metal to facilitate the charge separation and weaken the N–N triple bond. In this investigation, we review the literature knowledge about the photocatalysis phenomena and the most recent developments on the semiconductor nanocomposites for nitrogen fixation, following by a detailed discussion of each type of mechanism.

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Photoassisted catalytic dissociation of water and reduction of nitrogen to ammonia on partially reduced ferric oxide

Cited by 78 publications

References 0 publications

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

Alternative Strategies Toward Sustainable Ammonia Synthesis

Insights into the Recent Progress and Advanced Materials for Photocatalytic Nitrogen Fixation for Ammonia (NH3) Production

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Photoassisted catalytic dissociation of water and reduction of nitrogen to ammonia on partially reduced ferric oxide

Cited by 78 publications

References 0 publications

Tuning Oxygen Vacancies in Ultrathin TiO2 Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

Tuning Oxygen Vacancies in Ultrathin TiO2 Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

Alternative Strategies Toward Sustainable Ammonia Synthesis

Insights into the Recent Progress and Advanced Materials for Photocatalytic Nitrogen Fixation for Ammonia (NH3) Production

Contact Info

Product

Resources

About

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm

Tuning Oxygen Vacancies in Ultrathin TiO₂ Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm