3 years ago

Flexible non-precious metal Fe-N/C catalyst for highly efficient oxygen reduction reaction.

Xinping He, Yang Xia, Chu Liang, Jun Zhang, Hui Huang, Yongping Gan, Chun Zhao, Wenkui Zhang
A novel flexible non-precious-metal oxygen reduction reaction (ORR) catalyst is fabricated by direct pyrolysis of carbon cloth decorated aniline and pyrrole copolymer with iron-coordinated. The resultant Fe-N/C manifests superior activity, long-term stability in alkaline media, and comparable activity in acidic electrolyte. The precursor carbon cloth modified with aniline and pyrrole copolymer provides high densities of carbon, nitrogen and iron doping sites which generates a great many active sites. Compared to the Pt/C catalyst, Fe-N/C pyrolyzed at 850 oC (Fe-N/C-850) shows the excellent activity with onset and half-wave potentials of 17 mV and -174 mV in 0.1 M KOH, which are more activated than iron-free catalyst (-29 mV and -235 mV) and comparable to those of Pt/C (28 mV and -237 mV) with the same loading. The electro catalysis and reaction kinetics results demonstrate that Fe-N/C-850 will be a promising catalyst at low cost for applications in fuel cells.

Publisher URL: http://doi.org/10.1088/1361-6528/aafc7c

DOI: 10.1088/1361-6528/aafc7c

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