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Insights into Nitrogen-doped Carbon for Oxygen Reduction: The Role of Graphitic and Pyridinic Nitrogen Species.
Wang, Dongliang; Hu, Jingping; Wei, Junjie; Liu, Xianli; Hou, Huijie.
Afiliación
  • Wang D; School of Environmental Science and Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control &Remediation, Hubei Polytechnic University, 16 North Guilin Road, Xialu District, Huangshi, Hubei Province, P.R. China.
  • Hu J; School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, Hubei Province, P.R. China.
  • Wei J; School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, Hubei Province, P.R. China.
  • Liu X; School of Environmental Science and Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control &Remediation, Hubei Polytechnic University, 16 North Guilin Road, Xialu District, Huangshi, Hubei Province, P.R. China.
  • Hou H; College of Resource and Environmental Engineering, Wuhan University of Science and Technology, 947 Heping Avenue, Qingshan District, Wuhan, Hubei Province, P.R. China.
Chemphyschem ; 24(10): e202200734, 2023 May 16.
Article en En | MEDLINE | ID: mdl-36759329
Nitrogen-doped carbons (N/Cs) manifest good catalytic performance for oxygen reduction reaction (ORR) for fuel cell systems. However, to date, controversies remain on the role of active sites in N/Cs. In the present study, ORR test was conducted on three N/Cs in O2 -saturated 0.1 M KOH aqueous solution, where apparent linear correlation between graphitic N contents and ORR activity was observed. Theoretical calculations demonstrated that graphitic N doping is energetically more favorable than that of pyridinic N doping for ORR and the pyridinic N leads to more preferential with 2 e- ORR pathway. These results reveal that graphitic N plays a key role in N/Cs mediated ORR activity. This work lays a solid foundation on identifying the active sites in heteroatom-doped carbons and can be exploited for rational design and engineering of effective carbon-based ORR catalysts.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemphyschem Asunto de la revista: BIOFISICA / QUIMICA Año: 2023 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemphyschem Asunto de la revista: BIOFISICA / QUIMICA Año: 2023 Tipo del documento: Article Pais de publicación: Alemania