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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Effect of the thermal treatment of Fe/N/C catalysts for the oxygen reduction reaction synthesized by pyrolysis of covalent organic frameworks Álvaro García , Tarrick Haynes , Maria Retuerto , Pilar Ferrer , Laura Pascual , Miguel A. Peña , Mohamed Abdel Salam , Mohamed Mokhtar , Diego Gianolio , Sergio Rojas Industrial & Engineering Chemistry Research DOI: 10.1021/acs.iecr.1c02841 Diamond Proposal Number(s): [24881] Open Access Show Abstract ▼ Abstract: A nitrogen-containing covalent organic framework obtained from the polymerization of 1,3-dicyanobenzene has been used as a starting material for the synthesis of Fe/N/C catalysts for the oxygen reduction reaction (ORR). In this work we report the effect of the thermal treatments on the nature and catalytic properties of the catalysts obtained after the thermal treatments. After the first thermal treatment, the catalysts obtained contain metallic iron and iron carbide particles, along with a minority fraction of inorganic FeNx sites. After acid leaching and a second thermal treatment, FeNx sites remain in the catalysts, along with a minor fraction of graphite-wrapped Fe3C particles. Both catalysts display high activity for the ORR, with the catalyst subjected to acid leaching and a second thermal treatment, 2HT-1,3DCB, displaying higher ORR activity and a lower production of H2O2. This observation suggests that iron particles, such as Fe3C, display ORR activity but mainly toward the two-electron pathway. On the contrary, FeNx ensembles promote the ORR via the four-electron pathway, that is, via H2O formation.	Nov 2021

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B18-Core EXAFS

Effect of the thermal treatment of Fe/N/C catalysts for the oxygen reduction reaction synthesized by pyrolysis of covalent organic frameworks

Álvaro García , Tarrick Haynes , Maria Retuerto , Pilar Ferrer , Laura Pascual , Miguel A. Peña , Mohamed Abdel Salam , Mohamed Mokhtar , Diego Gianolio , Sergio Rojas

Industrial & Engineering Chemistry Research

DOI: 10.1021/acs.iecr.1c02841

Diamond Proposal Number(s): [24881]