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Perovskite oxide LaMO3-δ (M = Fe, Co, Ni and Cu) cathode for efficient electroreduction of nitrate.

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Title: Perovskite oxide LaMO3-δ (M = Fe, Co, Ni and Cu) cathode for efficient electroreduction of nitrate.
Authors: Yang, Wen-Jian1 (AUTHOR), Yang, Li-Hui1 (AUTHOR), Peng, Han-Jun1 (AUTHOR), Lv, Si-Hao1 (AUTHOR), Muhammad Adeel Sharif, Hafiz2 (AUTHOR), Sun, Wei1 (AUTHOR), Li, Wei1 (AUTHOR), Yang, Cao1 (AUTHOR), Lin, Hui1 (AUTHOR) linhui@dgut.edu.cn
Source: Separation & Purification Technology. Aug2022, Vol. 295, pN.PAG-N.PAG. 1p.
Subjects: Electrolytic reduction, Cathodes, Oxidation-reduction reaction, Electron sources, Oxides, Catalytic activity, Perovskite
Abstract: [Display omitted] • Perovskite oxide LaMO 3-δ cathodes were applied for NO 3 –-N electroreduction. • La 2 CuO 4 exhibited best catalytic performance as its super electrochemical property. • The selectivity of NH 4 +-N and N 2 were 82.4 ± 2.2% and 9.4 ± 2.4%, respectively. • Both electron- and H*-mediated pathway occurred for NO 3 –-N electroreduction. • Oxygen vacancies and redox cycle of Cu(I)-Cu(II)-Cu(I) worked for NO 3 –-N reduction. Electroreduction removal of nitrate (NO 3 –-N) is considered as a promising approach to solve its adverse effects on environment and human health, where efficient and cheap catalysts are required. Perovskite-based catalysts showed a versatile catalytic ability for wide range of redox reactions, but seldom applied for NO 3 –-N reduction. Herein, four perovskite oxide cathodes, LaMO 3-δ (M = Fe, Co, Ni and Cu) were prepared and used for the reduction of NO 3 –-N. The Ruddlesden-Popper (RP) type La 2 CuO 4 exhibited the best NO 3 –-N catalytic activity among the four perovskite oxide cathodes, with a removal rate of 11.7 × 10-3 min−1. The high selectivity of NH 4 +-N (82.4 ± 2.2%) indicated that NH 4 +-N was the main final product for NO 3 –-N electroreduction at La 2 CuO 4 cathode, but 100% of N 2 selectivity could be obtained with addition of 1000 and 1500 mg/L Cl- as the electro-assisted chlorination process. The mechanism of NO 3 –-N electroreduction occurred by both electron- and H*-mediated pathway, and the oxygen vacancies and redox cycle of Cu(I)-Cu(II)-Cu(I) were proposed as the accommodation sties and direct electron sources for NO 3 –-N reduction. Generally, this study opens a novel avenue for the development of earth-abundant, cost-effective catalyst with effective NO 3 –-N electroreduction. [ABSTRACT FROM AUTHOR]
Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Perovskite oxide LaMO3-δ (M = Fe, Co, Ni and Cu) cathode for efficient electroreduction of nitrate.
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  Data: <searchLink fieldCode="AR" term="%22Yang%2C+Wen-Jian%22">Yang, Wen-Jian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Li-Hui%22">Yang, Li-Hui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peng%2C+Han-Jun%22">Peng, Han-Jun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lv%2C+Si-Hao%22">Lv, Si-Hao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Muhammad+Adeel+Sharif%2C+Hafiz%22">Muhammad Adeel Sharif, Hafiz</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Wei%22">Sun, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Wei%22">Li, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Cao%22">Yang, Cao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Hui%22">Lin, Hui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> linhui@dgut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Separation+%26+Purification+Technology%22">Separation & Purification Technology</searchLink>. Aug2022, Vol. 295, pN.PAG-N.PAG. 1p.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [Display omitted] • Perovskite oxide LaMO 3-δ cathodes were applied for NO 3 –-N electroreduction. • La 2 CuO 4 exhibited best catalytic performance as its super electrochemical property. • The selectivity of NH 4 +-N and N 2 were 82.4 ± 2.2% and 9.4 ± 2.4%, respectively. • Both electron- and H*-mediated pathway occurred for NO 3 –-N electroreduction. • Oxygen vacancies and redox cycle of Cu(I)-Cu(II)-Cu(I) worked for NO 3 –-N reduction. Electroreduction removal of nitrate (NO 3 –-N) is considered as a promising approach to solve its adverse effects on environment and human health, where efficient and cheap catalysts are required. Perovskite-based catalysts showed a versatile catalytic ability for wide range of redox reactions, but seldom applied for NO 3 –-N reduction. Herein, four perovskite oxide cathodes, LaMO 3-δ (M = Fe, Co, Ni and Cu) were prepared and used for the reduction of NO 3 –-N. The Ruddlesden-Popper (RP) type La 2 CuO 4 exhibited the best NO 3 –-N catalytic activity among the four perovskite oxide cathodes, with a removal rate of 11.7 × 10-3 min−1. The high selectivity of NH 4 +-N (82.4 ± 2.2%) indicated that NH 4 +-N was the main final product for NO 3 –-N electroreduction at La 2 CuO 4 cathode, but 100% of N 2 selectivity could be obtained with addition of 1000 and 1500 mg/L Cl- as the electro-assisted chlorination process. The mechanism of NO 3 –-N electroreduction occurred by both electron- and H*-mediated pathway, and the oxygen vacancies and redox cycle of Cu(I)-Cu(II)-Cu(I) were proposed as the accommodation sties and direct electron sources for NO 3 –-N reduction. Generally, this study opens a novel avenue for the development of earth-abundant, cost-effective catalyst with effective NO 3 –-N electroreduction. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.seppur.2022.121278
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Electrolytic reduction
        Type: general
      – SubjectFull: Cathodes
        Type: general
      – SubjectFull: Oxidation-reduction reaction
        Type: general
      – SubjectFull: Electron sources
        Type: general
      – SubjectFull: Oxides
        Type: general
      – SubjectFull: Catalytic activity
        Type: general
      – SubjectFull: Perovskite
        Type: general
    Titles:
      – TitleFull: Perovskite oxide LaMO3-δ (M = Fe, Co, Ni and Cu) cathode for efficient electroreduction of nitrate.
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            NameFull: Yang, Wen-Jian
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            NameFull: Yang, Li-Hui
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            NameFull: Lv, Si-Hao
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              Text: Aug2022
              Type: published
              Y: 2022
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              Value: 295
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