Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

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

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]