Feasible Tuning of Surface OVs on (001) TiO<sub>2</sub> for Superior Photocatalytic Nitrogen Fixation Activity

Bao, Liang; Bao, Qinyu; Zhang, Huaiwei; Yuan, Yong‐Jun

doi:10.1002/cphc.202100418

Cited by 11 publications

(3 citation statements)

References 41 publications

(41 reference statements)

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“…Under these circumstances, bulk oxygen defects, acting as the center of charge recombination, may begin to accumulate, which may have a negative impact on the photocatalytic activity. 42 The increased oxygen vacancies after the EG treatment were further confirmed from EPR spectroscopy measurements. In contrast to InVO 4 , the EG 10 h-InVO 4 samples exhibit much stronger peak intensity, indicating more abundant oxygen vacancies, which is in accordance with the XPS results.…”

Section: Environmental Science: Nano Papermentioning

confidence: 68%

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Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

Shan

Liu

et al. 2022

Environ. Sci.: Nano

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Section: Environmental Science: Nano Papermentioning

confidence: 68%

“…Under these circumstances, bulk oxygen defects, acting as the center of charge recombination, may begin to accumulate, which may have a negative impact on the photocatalytic activity. 42…”

Section: Resultsmentioning

confidence: 99%

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

Shan

Liu

et al. 2022

Environ. Sci.: Nano

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“…In 1977, Schrauzer and Guth opened a new chapter in photocatalytic nitrogen reduction by utilizing TiO 2 − under UV light because of its low cost and excellent stability, but the low utilization rate of photocarriers limited its application. Since then, researchers have developed a series of photocatalysts with excellent performance such as polymeric carbon nitride (PCN), , BiOX, , metal oxides, and layered double hydroxide , for N 2 fixation.…”

Section: Basic Mechanism Understanding For Nitrogen Reduction To Ammoniamentioning

confidence: 99%

Research Progress and Perspectives on Active Sites of Photo- and Electrocatalytic Nitrogen Reduction

et al. 2022

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Ammonia is closely relevant to human production and life. Although the widely used conventional Haber−Bosch process has a relatively high ammonia yield, it has obvious disadvantages of high energy consumption, serious pollution, and harsh reaction conditions. Compared with the Haber−Bosch process, photo-and electrocatalytic N 2 fixation has been demonstrated to be energy-saving, environmentally friendly, and economical because the ammonia can be generated under mild conditions. During the photo/electrocatalytic ammonia-production processes, sunlight or electricity is used as the renewable energy input, the atmosphere is used as the nitrogen source, and water is used as the proton source. However, the ammonia yields of the photo-and electrocatalytic nitrogen fixation are commonly low, which is mainly resulted by the lack of active sites to adsorb N 2 molecules and active N�N triple bonds. On the basis of the discussion about the importance of active sites for ammonia synthesis by summarizing the reaction mechanism of photo-and electrocatalytic methods, we outline the common methods of producing abundant active sites of N 2 adsorption and activation on the surface of catalysts, including vacancy introduction, heteroatom doping, cocatalyst support, and frustrated Lewis pairs construction. We also summarize the detection methods of ammonia, as well as other problems existing during the photo-and electrocatalytic nitrogen-fixation processes.

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High‐Performance Photocatalytic Reduction of Nitrogen to Ammonia Driven by Oxygen Vacancy and Ferroelectric Polarization Field of SrBi₄Ti₄O₁₅ Nanosheets

Gao

Yang

et al. 2022

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Photo‐responsive semiconductors can facilitate nitrogen activation and ammonia production, but the high recombination rate of photogenerated carriers represents a significant barrier. Ferroelectric photocatalysts show great promise in overcoming this challenge. Herein, by adopting a low‐temperature hydrothermal procedure with varying concentrations of glyoxal as the reducing agent, oxygen vacancies (Vo) are effectively produced on the surface of ferroelectric SrBi4Ti4O15 (SBTO) nanosheets, which leads to a considerable increase in photocatalytic activity toward nitrogen fixation under simulated solar light with an ammonia production rate of 53.41 µmol g−1 h−1, without the need of sacrificial agents or photosensitizers. This is ascribed to oxygen vacancies that markedly enhance the self‐polarization and internal electric field of ferroelectric SBTO, and hence, facilitate the separation of photogenerated charge carriers and light trapping as well as N2 adsorption and activation, as compared to pristine SBTO. Consistent results are obtained in theoretical studies. Results from this study highlight the significance of surface oxygen vacancies in enhancing the performance of photocatalytic nitrogen fixation by ferroelectric catalysts.

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Feasible Tuning of Surface OVs on (001) TiO₂ for Superior Photocatalytic Nitrogen Fixation Activity

Cited by 11 publications

References 41 publications

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

Research Progress and Perspectives on Active Sites of Photo- and Electrocatalytic Nitrogen Reduction

High‐Performance Photocatalytic Reduction of Nitrogen to Ammonia Driven by Oxygen Vacancy and Ferroelectric Polarization Field of SrBi₄Ti₄O₁₅ Nanosheets

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Feasible Tuning of Surface OVs on (001) TiO2 for Superior Photocatalytic Nitrogen Fixation Activity

Cited by 11 publications

References 41 publications

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO4 nanosheets

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO4 nanosheets

Research Progress and Perspectives on Active Sites of Photo- and Electrocatalytic Nitrogen Reduction

High‐Performance Photocatalytic Reduction of Nitrogen to Ammonia Driven by Oxygen Vacancy and Ferroelectric Polarization Field of SrBi4Ti4O15 Nanosheets

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Product

Resources

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Feasible Tuning of Surface OVs on (001) TiO₂ for Superior Photocatalytic Nitrogen Fixation Activity

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

Robust route to photocatalytic nitrogen fixation mediated by capitalizing on defect-tailored InVO₄ nanosheets

High‐Performance Photocatalytic Reduction of Nitrogen to Ammonia Driven by Oxygen Vacancy and Ferroelectric Polarization Field of SrBi₄Ti₄O₁₅ Nanosheets