415809 Nitrogen-Doped Hierarchical Carbon for High-Performance Oxygen Reduction and Evolution Catalysis

Wednesday, November 11, 2015: 3:15 PM
355C (Salt Palace Convention Center)
John To1, Desmond Ng2, Samira Siahrostami3, Jiajun He4, Jennifer Wilcox4, Felix Studt5, Jens K. Norskov6, Thomas F. Jaramillo6 and Zhenan Bao1, (1)Chemical Engineering, Stanford University, Stanford, CA, (2)Department of Chemical & Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, (3)SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA, (4)Energy Resources Engineering, Stanford University, Stanford, CA, (5)SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, (6)Department of Chemical Engineering, Stanford University, Stanford, CA

The development of high-performance and low-cost bifunctional oxygen catalysts that can be easily integrated into fuel cell devices is important to energy storage systems that utilize O2-H2O chemistries such as regenerative fuel cells and metal-air batteries. Here, we report a low cost nitrogen-doped hierarchical carbon (NHC) synthesized using a soft template approach for facile device integration. The NHC catalyst exhibits excellent performance for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) as demonstrated by electrochemical studies. The activities observed for both the ORR and the OER are comparable to that achieved by state-of-the-art Pt and Ir in an alkaline environment, but at much lower costs. This work demonstrates the potential of NHC to replace commercial precious metals in regenerative fuel cells and possibly metal-air batteries for cost-effective storage of intermittent renewable energy.

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See more of this Session: Novel Nanostructured Catalytic Materials I
See more of this Group/Topical: Catalysis and Reaction Engineering Division