Effect of pyrolysis pressure on activity of Fe–N–C catalysts for oxygen reduction

Autor:	Yuanchao Liu, Nathaniel Leonard, Barr Halevi, Cenk Gumeci, Samuel McKinney, Scott Calabrese Barton
Rok vydání:	2015
Předmět:	biology Renewable Energy Sustainability and the Environment Inorganic chemistry chemistry.chemical_element Active site General Chemistry Nitrogen Oxygen reduction Catalysis chemistry.chemical_compound Adsorption chemistry biology.protein General Materials Science Melamine Carbon Pyrolysis
Zdroj:	Journal of Materials Chemistry A. 3:21494-21500
ISSN:	2050-7496 2050-7488
Popis:	Iron and nitrogen doped carbon, Fe–N–C, catalysts are synthesized by high pressure pyrolysis of Ketjenblack carbon, melamine and iron acetate precursor mixture in a closed, reusable scale-up stainless steel reactor. The effects of precursor loading with constant precursor ratios on obtained pressure, nitrogen retention and oxygen reduction reaction (ORR) activities are studied. The results indicate that higher precursor loading increases the gas phase pressure and improves nitrogen retention and ORR activity. Furthermore, a relationship is found between active site density, nitrogen retention and pressure that suggests that the limiting reaction may be an adsorption process driven via high pressure of volatile intermediates from the melamine.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::996882ee2f3b0ae1abfb3fbb6860b711 https://doi.org/10.1039/c5ta05995j Zobrazit plný text záznamu