A Versatile Iron-Tannin-Framework Ink Coating Strategy to Fabricate Biomass-Derived Iron Carbide/Fe-N-Carbon Catalysts for Efficient Oxygen Reduction

作者：Wei, Jing; Liang, Yan; Hu, Yaoxin; Kong, Biao; Simon, George P.; Zhang, Jin; Jiang, San Ping; Wang, Huanting^*

来源：Angewandte Chemie - International Edition, 2016, 55(4): 1355-1359.

DOI：10.1002/anie.201509024

• biomass
• carbon
• metal-tannin framework
• non-precious metal catalysts
• oxygen reduction reaction

The conversion of biomass into valuable carbon composites as efficient non-precious metal oxygen-reduction electrocatalysts is attractive for the development of commercially viable polymer electrolyte membrane fuel-cell technology. Herein, a versatile iron-tannin-framework ink coating strategy is developed to fabricate cellulose-derived Fe3C/Fe-NC catalysts using commercial filter paper, tissue, or cotton as a carbon source, an iron-tannin framework as an iron source, and dicyandiamide as a nitrogen source. The oxygen reduction performance of the resultant Fe3C/Fe-N-C catalysts shows a high onset potential (i.e. 0.98V vs the reversible hydrogen electrode (RHE)), and large kinetic current density normalized to both geometric electrode area and mass of catalysts (6.4 mAcm(-2) and 32 mAmg(-1) at 0.80 V vs RHE) in alkaline condition. This method can even be used to prepare efficient catalysts using waste carbon sources, such as used polyurethane foam.

• 出版日期2016-1-22