RT Journal Article
T1 Robust Amide‐Linked Fluorinated Covalent Organic Framework for Long‐Term Oxygen Reduction Reaction Electrocatalysis
A1 Jiménez‐Duro, Miguel
A1 Martínez‐Periñán, Emiliano
A1 Martínez‐Fernández, Marcos
A1 Martínez, José I.
A1 Lorenzo, Encarnación
A1 Segura Castedo, José Luis
AB <jats:title>Abstract</jats:title><jats:p>The high energy demand of the evolving world opens the door to develop more sustainable and environmentally friendly energy sources. Oxygen reduction reaction (ORR) is a promising candidate, being the 2e<jats:sup>−</jats:sup> pathway of great interest for the green production of hydrogen peroxide. Metal‐free covalent organic frameworks (COFs) electrocatalysts present a suitable alternative to substitute the noble‐metals more commonly employed in this application. However, the lability of the linkages building up the framework raises an issue for their long‐term use and application in aggressive media. Herein, a stable amide‐linked COF is reported through post‐synthetic modification of a previously reported imine‐linked COF proven to be effective as an electrocatalyst, enhancing its chemical stability and electrochemical response. It is found that after the linkage transformation, the new electrocatalyst displays a higher selectivity toward the H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> production (98.5%) and an enhanced turnover frequency of 0.155 s<jats:sup>−1</jats:sup>, which is among the bests reported to date for metal‐free and COF based electrocatalysts. The results represent a promising step forward for metal‐free non pyrolyzed electrocatalysts, improving their properties through post‐synthetic linkage modification for long‐term operation.</jats:p>
PB Wiley
SN 1613-6810
SN 1613-6829
YR 2024
FD 2024-05-21
LK https://hdl.handle.net/20.500.14352/104897
UL https://hdl.handle.net/20.500.14352/104897
LA eng
NO M. Jiménez-Duro, E. Martínez-Periñán, M. Martínez-Fernández, J. I. Martínez, E. Lorenzo, J. L. Segura, Robust Amide-Linked Fluorinated Covalent Organic Framework for Long-Term Oxygen Reduction Reaction Electrocatalysis. Small 2024, 2402082. https://doi.org/10.1002/smll.202402082
NO PLEC2021-007906
NO TED2021- 129416A-I00
NO REACT-UE NANOCOV-CM, TRANSNANOAVANSENS
NO S2018/NMT-434
NO 2021–5A/BIO-2094
NO SI3/PJI/2021-00341
NO S2018/NMT-4367
NO Y2020/NMT-6469
DS Docta Complutense
RD 7 abr 2025