A Prussian blue route to nitrogen-doped graphene aerogels as efficient electrocatalysts for oxygen reduction with enhanced active site accessibility |
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| Authors: | Yayuan Liu Haotian Wang Dingchang Lin Jie Zhao Chong Liu Jin Xie Yi Cui |
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| Affiliation: | 1. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;2. Department of Applied Physics, Stanford University, Stanford, CA 94305, USA;3. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA |
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| Abstract: | Developing high-performance nonpredous-metal electrocatalysts for the oxygen reduction reaction (ORR) is crudal for a variety of renewable energy conversion and storage systems.Toward that end,rational catalyst design principles that lead to highly active catalytic centers and enhanced active site accessibility are undoubtedly of paramount importance.Here,we used Prussian blue nanoparticles to anchor Fe/Fe3C species to nitrogen-doped reduced graphene oxide aerogels as ORR catalysts.The strong interaction between nanosized Fe3C and the graphitic carbon shell led to synergistic effects in the ORR,and the protection of the carbon shell guaranteed stability of the catalyst.As a result,the aerogel electrocatalyst displayed outstanding activity in the ORR on par with the state-of-the-art Pt/C catalyst at the same mass loading in alkaline media,good performance in acidic media,and excellent stability and crossover tolerance that rivaled that of the best nonprecious-metal ORR electrocatalysts reported to date. |
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| Keywords: | oxygen reduction reaction Prussian blue nanoparticles reduced graphene oxide aerogel nitrogen doping |
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