Self-Supporting Oxygen Reduction Electrocatalysts Made from a Nitrogen-Rich Network Polymer Yong Zhao Kazuya Watanabe Kazuhito Hashimoto 10.1021/ja3085934.s001 https://acs.figshare.com/articles/journal_contribution/Self_Supporting_Oxygen_Reduction_Electrocatalysts_Made_from_a_Nitrogen_Rich_Network_Polymer/2463931 We report the design, synthesis, and evaluation of a new type of non-precious-metal catalyst made from network polymers. 2,6-Diaminopyridine was selected as a building-block monomer for the formation of a nitrogen-rich network polymer that forms self-supporting spherical backbone structures and contains a high density of metal-coordination sites. A Co-/Fe-coordinating pyrolyzed polymer exhibited a high specific oxygen reduction activity with onset and half-wave potentials of 0.87 and 0.76 V vs RHE, respectively, in neutral media. There was no crossover effect of organics on its activity. The power output of a microbial fuel cell equipped with this catalyst on its cathode was more than double the output with a commercial 20 wt % Pt/C catalyst. 2012-12-05 00:00:00 crossover effect backbone structures oxygen reduction activity catalyst fuel cell network polymers 0.76 V vs RHE power output