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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
01/12/2022 |
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Data da última atualização: |
01/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, M. A. R. da; SILVA, I. F.; XUE, Q.; LO, B. T. W.; TARAKINA, N. V.; NUNES, B. N.; ADLER, P.; SAHOO, S. K.; BAHNEMANN, D. W.; LÓPEZ-SALAS, N.; SAVATEEV, A.; RIBEIRO, C.; KÜLNE, T. D.; ANTONIETTI, M.; TEIXEIRA, I. F. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Sustainable oxidation catalysis supported by light: Fe-poly (heptazine imide) as a heterogeneous single-atom photocatalyst. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Applied Catalysis B: Environmental, v. 304, a120965, 2022. |
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Páginas: |
1 - 11 |
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ISSN: |
0926-3373 |
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DOI: |
https://doi.org/10.1016/j.apcatb.2021.120965 |
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Idioma: |
Inglês |
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Conteúdo: |
Fe-N-C materials, when prepared as single-atom catalysts (SAC), display excellent activities in oxidation reactions. The systematic investigation of the iron coordination mode revealed that Fe-N4C catalysts are the most active for C-H bond oxidation. However, many of these catalysts are synthesized through pyrolysis, which is characterized by a lack of control and structures with heterogeneous composition, rarely presenting only atomically dispersed Fe− N − C as active sites. Herein, an alternative, reliable and easily reproducible method to obtain highly active Fe SACs (atomically dispersed) with Fe-N4 sites is presented, which is based on ion exchange of sodium from high crystalline sodium poly(heptazine imide) (Na-PHI) by other ions. The obtained catalyst can photocatalytically oxidize C-H bonds selectively toward ketones using only dioxygen. Detailed mechanism investigations indicate that the active species in the C-H bond oxidation are highly valent Fe(IV)/Fe(V)-oxo species, which are further activated by the holes generated at the PHI support under light irradiation. |
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Palavras-Chave: |
Benzene Oxidation; Poly (heptazine imide); Single-atom catalysis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02174naa a2200361 a 4500
001 2149063
005 2022-12-01
008 2022 bl uuuu u00u1 u #d
022 $a0926-3373
024 7 $ahttps://doi.org/10.1016/j.apcatb.2021.120965$2DOI
100 1 $aSILVA, M. A. R. da
245 $aSustainable oxidation catalysis supported by light$bFe-poly (heptazine imide) as a heterogeneous single-atom photocatalyst.$h[electronic resource]
260 $c2022
300 $a1 - 11
520 $aFe-N-C materials, when prepared as single-atom catalysts (SAC), display excellent activities in oxidation reactions. The systematic investigation of the iron coordination mode revealed that Fe-N4C catalysts are the most active for C-H bond oxidation. However, many of these catalysts are synthesized through pyrolysis, which is characterized by a lack of control and structures with heterogeneous composition, rarely presenting only atomically dispersed Fe− N − C as active sites. Herein, an alternative, reliable and easily reproducible method to obtain highly active Fe SACs (atomically dispersed) with Fe-N4 sites is presented, which is based on ion exchange of sodium from high crystalline sodium poly(heptazine imide) (Na-PHI) by other ions. The obtained catalyst can photocatalytically oxidize C-H bonds selectively toward ketones using only dioxygen. Detailed mechanism investigations indicate that the active species in the C-H bond oxidation are highly valent Fe(IV)/Fe(V)-oxo species, which are further activated by the holes generated at the PHI support under light irradiation.
653 $aBenzene Oxidation
653 $aPoly (heptazine imide)
653 $aSingle-atom catalysis
700 1 $aSILVA, I. F.
700 1 $aXUE, Q.
700 1 $aLO, B. T. W.
700 1 $aTARAKINA, N. V.
700 1 $aNUNES, B. N.
700 1 $aADLER, P.
700 1 $aSAHOO, S. K.
700 1 $aBAHNEMANN, D. W.
700 1 $aLÓPEZ-SALAS, N.
700 1 $aSAVATEEV, A.
700 1 $aRIBEIRO, C.
700 1 $aKÜLNE, T. D.
700 1 $aANTONIETTI, M.
700 1 $aTEIXEIRA, I. F.
773 $tApplied Catalysis B: Environmental$gv. 304, a120965, 2022.
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| 1. |  | LEMOS, T. A.; GIACOMIN, L. L.; GUERREIRO, Q. L. de M.; OLIVEIRA JUNIOR, R. C. de. Variação mensal das concentrações de nutrientes da serapilheira em área de floresta na Amazônia Oriental. In: CONGRESSO TÉCNICO CIENTÍFICO DA ENGENHARIA E DA AGRONOMIA; SEMANA OFICIAL DA ENGENHARIA E DA AGRONOMIA, 74., 2017, Belém, PA. A responsabilidade da Engenharia e da Agronomia para o desenvolvimento do País. [Brasília, DF]: Confea, 2017.| Tipo: Artigo em Anais de Congresso |
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