Fe/N/C Electrocatalysts for Oxygen Reduction Reaction in PEM Fuel Cells Using Nitrogen-Rich Ligand as Precursor

Autor:	Yumiao Su, Wenmu Li, Lingling Yang, Xianwen Kan
Rok vydání:	2015
Předmět:	Ligand Inorganic chemistry Nanoparticle Proton exchange membrane fuel cell Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ferrous Catalysis chemistry.chemical_compound General Energy Monomer chemistry Physical and Theoretical Chemistry Pyrolysis
Zdroj:	The Journal of Physical Chemistry C. 119:11311-11319
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp511576q
Popis:	High temperature pyrolysis can significantly improve the activity and stability of Fe-based catalysts. However, unwanted iron nanoparticles, which are proven inactive to oxygen reduction reaction (ORR), will form under this procedure. Herein, a nitrogen-rich and hindrance multifunctional 6,7-di(pyridin-2-yl)pteridine-2,4-diamine (DPPD) monomer was deliberately designed and synthesized. High content of thermally stable nitrogen in DPPD can increase the degree of coordination with iron and provide a high content of active nitrogen after pyrolysis. Distorted nitrogen-rich ferrous complex polymers were successfully prepared to keep iron ions well separated and prevent them from aggregating during the heat treatment. Carbon-supported Fe-based catalysts with different initial iron loadings from 0.2 to 4.0 wt % were obtained. Transmission electron microscopy (TEM) revealed that there were no obvious nanocrystals observed, even the initial iron loading was up to 2.0 wt %. The electrochemical performance of the Fe...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a133cb0d6f3424d7dab473936f04299e https://doi.org/10.1021/jp511576q Zobrazit plný text záznamu