title: A rational synthesis of hierarchically porous, N-doped carbon from Mg-based MOFs: understanding the link between nitrogen content and oxygen reduction electrocatalysis.
abstract: Controlled mixtures of novel Mg-based metal-organic frameworks (MOFs) were prepared, with H(+) or K(+) as counterions. A linear relation was found between synthesis pH and K/H ratio in the resultant mixture, establishing the tunability of the synthesis. Upon pyrolysis, these precursor mixtures yield nitrogen-doped, hierarchically porous carbons, which have good activity towards the oxygen reduction reaction (ORR) at pH 13. The nitrogen content varies significantly along the homologous carbon series (>400%, 1.3 at% to 5.7 at%), to a much greater extent than microstructural parameters such as surface area and graphitization. This allows us to isolate the positive correlation between nitrogen content and electrocatalytic oxygen reduction ORR activity in this class of metal-free, N-doped, porous carbons.
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: David
authors.initials: D
authors.lastname: Eisenberg
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: Wowa
authors.initials: W
authors.lastname: Stroek
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: Norbert J
authors.initials: NJ
authors.lastname: Geels
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: Stefania
authors.initials: S
authors.lastname: Tanase
authors.affiliation: Faculty of Chemistry, Inorganic Chemistry Department, University of Bucharest, Dumbrava Rosie 23, Bucharest 020462, Romania.
authors.forename: Marilena
authors.initials: M
authors.lastname: Ferbinteanu
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Teat
authors.affiliation: Tribology and Interface Chemistry Group, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland.
authors.forename: Pierre
authors.initials: P
authors.lastname: Mettraux
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: Ning
authors.initials: N
authors.lastname: Yan
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. d.eisenberg@uva.nl n.yan@uva.nl g.rothenberg@uva.nl.
authors.forename: Gadi
authors.initials: G
authors.lastname: Rothenberg