title: Enhancing Electrocatalytic Performance of Bifunctional Cobalt-Manganese-Oxynitride Nanocatalysts on Graphene.
abstract: We report the synthesis and characterization of graphenesupported cobalt-manganese-oxynitride nanocatalysts (CoMnON/G) as bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). A nitriding treatment of spinel compound CoMnO increased the ORR activity considerably, and the most active material catalyzed the ORR with only a 30 mV half-wave potential difference from the commercial carbon-supported platinum (Pt/C) in alkaline media. In addition to high activity, the catalyst also exhibited an intrinsic stability that outperformed Pt/C. An appropriately designed nitridation thus facilitates new directions for developing active and durable non-precious-metal oxynitride electocatalysts.
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, United States.|Chemistry Department, SUNY Stony Brook, Stony Brook, NY, 11794, United States.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Kurian A
authors.initials: KA
authors.lastname: Kuttiyiel
authors.affiliation: Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Lijun
authors.initials: L
authors.lastname: Wu
authors.affiliation: Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Yimei
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Etsuko
authors.initials: E
authors.lastname: Fujita
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Radoslav R
authors.initials: RR
authors.lastname: Adzic
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, United States.
authors.forename: Kotaro
authors.initials: K
authors.lastname: Sasaki
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry; D006108:Graphite / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*
chemical_list: D003035:Cobalt; D008345:Manganese; D006108:Graphite; D009584:Nitrogen
keywords: nitriding; oxygen evolution; oxygen reduction; oxynitride; spinel