Oxidized Surface Layer on Transition Metal Nitrides: Active Catalysts for the Oxygen Reduction Reaction
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsMelissa E. Kreider, Michaela Burke Stevens, Alessandro Gallo, Hadi Abroshan, Seoin Back, Samira Siahrostami, Jens K. Nørskov, Laurie A. King, Thomas Francisco Jaramillo
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Abstract
An electrode catalyst for an Oxygen Reduction Reaction (ORR) is provided that includes a transition metal nitride layer on a substrate, an ORR surface oxide layer deposited on the transition metal nitride layer, where the ORR surface oxide layer includes from sub-monolayer to 20 surface oxide monolayers.
Claims12
1) An electrode catalyst for an Oxygen Reduction Reaction (ORR), comprising:
- a) a transition metal nitride layer on a substrate;
- b) an ORR catalyst surface oxide layer deposited on said transition metal nitride layer, wherein said ORR catalyst surface-oxide-layer comprises from sub-monolayer to 20 surface oxide monolayers.
7) A method of forming an electrode catalyst for an ORR, comprising:
- a) depositing a transition metal nitride layer on a substrate, using reactive sputtering deposition;
- and
- b) forming an oxidized surface layer in-situ on a surface of said transition metal nitride layer using an application of oxidizing electrochemical bias.
Dependencies are inferred from the claim text.