FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3207926013> ?p ?o ?g. }

• W3207926013 abstract "Metal-free nitrogen-doped carbon is considered as a green functional material, but the structural determination of the atomic positions of nitrogen remains challenging. We recently demonstrated that directly-excited solid state ¹⁵N NMR (ssNMR) spectroscopy is a powerful tool for the determination of such positions in an N-doped carbon at natural ¹⁵N isotope abundance. Here we present a green chemistry approach to the synthesis of N-doped carbon using cellulose as precursor, and a study of the catalytic properties and atomic structures of the related catalyst. The N-doped carbon (NH₃) was obtained by oxidation of cellulose with HNO₃ followed by ammonolysis at 800°C. It had a N content of 6.5 wt.% and a surface area of 557 m²g^–1, and ¹⁵N ssNMR spectroscopy provided evidence for graphitic nitrogen besides of regular pyrrolic and pyridinic nitrogen. This structure determination enabled probing the role of graphitic nitrogen for electrocatalytic reactions, such as the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and nitrite reduction reaction. The N-doped carbon catalyst (NH₃) had higher electrocatalytic activities in OER and HER under alkaline conditions and a higher activity for nitrite reduction, as compared with a catalyst prepared by carbonization of the HNO₃-treated cellulose in N₂. The electrocatalytic selectivity for nitrite reduction of the N-doped carbon catalyst (NH₃) was directly related to the graphitic nitrogen functions. Complementary structural analysis by means of ¹³C and ¹H ssNMR, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and low-temperature N₂adsorption were preformed and provided support to the findings. The results show that directly-excited ¹⁵N ssNMR at natural ¹⁵N abundance is generally capable to provide information on N-doped carbon materials, and it is expected that the approach can be applied to a wide range of solids with an intermediate amount of N atoms." @default.
• W3207926013 created "2021-10-25" @default.
• W3207926013 creator A5004773873 @default.
• W3207926013 creator A5018426300 @default.
• W3207926013 creator A5027955235 @default.
• W3207926013 creator A5030872551 @default.
• W3207926013 creator A5032769690 @default.
• W3207926013 creator A5035162599 @default.
• W3207926013 creator A5036918893 @default.
• W3207926013 creator A5066444330 @default.
• W3207926013 creator A5073710520 @default.
• W3207926013 creator A5078185062 @default.
• W3207926013 date "2020-09-04" @default.
• W3207926013 modified "2023-09-27" @default.
• W3207926013 title "Graphitic Nitrogen in Carbon Catalysts Important for the Reduction of Nitrite Revealed by 15N NMR Spectroscopy at Natural Abundance" @default.
• W3207926013 doi "https://doi.org/10.26434/chemrxiv.12906227.v1" @default.
• W3207926013 hasPublicationYear "2020" @default.
• W3207926013 type Work @default.
• W3207926013 sameAs 3207926013 @default.
• W3207926013 citedByCount "0" @default.
• W3207926013 crossrefType "posted-content" @default.
• W3207926013 hasAuthorship W3207926013A5004773873 @default.
• W3207926013 hasAuthorship W3207926013A5018426300 @default.
• W3207926013 hasAuthorship W3207926013A5027955235 @default.
• W3207926013 hasAuthorship W3207926013A5030872551 @default.
• W3207926013 hasAuthorship W3207926013A5032769690 @default.
• W3207926013 hasAuthorship W3207926013A5035162599 @default.
• W3207926013 hasAuthorship W3207926013A5036918893 @default.
• W3207926013 hasAuthorship W3207926013A5066444330 @default.
• W3207926013 hasAuthorship W3207926013A5073710520 @default.
• W3207926013 hasAuthorship W3207926013A5078185062 @default.
• W3207926013 hasBestOaLocation W32079260131 @default.
• W3207926013 hasConcept C104779481 @default.
• W3207926013 hasConcept C140205800 @default.
• W3207926013 hasConcept C159985019 @default.
• W3207926013 hasConcept C161790260 @default.
• W3207926013 hasConcept C178790620 @default.
• W3207926013 hasConcept C179104552 @default.
• W3207926013 hasConcept C185592680 @default.
• W3207926013 hasConcept C192562407 @default.
• W3207926013 hasConcept C2776179834 @default.
• W3207926013 hasConcept C2776384668 @default.
• W3207926013 hasConcept C2779251873 @default.
• W3207926013 hasConcept C36674120 @default.
• W3207926013 hasConcept C537208039 @default.
• W3207926013 hasConceptScore W3207926013C104779481 @default.
• W3207926013 hasConceptScore W3207926013C140205800 @default.
• W3207926013 hasConceptScore W3207926013C159985019 @default.
• W3207926013 hasConceptScore W3207926013C161790260 @default.
• W3207926013 hasConceptScore W3207926013C178790620 @default.
• W3207926013 hasConceptScore W3207926013C179104552 @default.
• W3207926013 hasConceptScore W3207926013C185592680 @default.
• W3207926013 hasConceptScore W3207926013C192562407 @default.
• W3207926013 hasConceptScore W3207926013C2776179834 @default.
• W3207926013 hasConceptScore W3207926013C2776384668 @default.
• W3207926013 hasConceptScore W3207926013C2779251873 @default.
• W3207926013 hasConceptScore W3207926013C36674120 @default.
• W3207926013 hasConceptScore W3207926013C537208039 @default.
• W3207926013 hasLocation W32079260131 @default.
• W3207926013 hasLocation W32079260132 @default.
• W3207926013 hasOpenAccess W3207926013 @default.
• W3207926013 hasPrimaryLocation W32079260131 @default.
• W3207926013 hasRelatedWork W127801 @default.
• W3207926013 hasRelatedWork W14088378 @default.
• W3207926013 hasRelatedWork W15916315 @default.
• W3207926013 hasRelatedWork W16013205 @default.
• W3207926013 hasRelatedWork W17389971 @default.
• W3207926013 hasRelatedWork W24077030 @default.
• W3207926013 hasRelatedWork W30748235 @default.
• W3207926013 hasRelatedWork W33495739 @default.
• W3207926013 hasRelatedWork W4293575 @default.
• W3207926013 hasRelatedWork W9068379 @default.
• W3207926013 isParatext "false" @default.
• W3207926013 isRetracted "false" @default.
• W3207926013 magId "3207926013" @default.
• W3207926013 workType "article" @default.