Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9569604 | Applied Surface Science | 2019 | 7 Pages |
Abstract
Rational design of oxygen reduction reaction (ORR) electrocatalysts based on earth-abundant elements is critical important towards sustainable energy applications. Among various reported ORR electrocatalysts, transition metal-nitrogen doped carbon (TM-N/C) materials such as Fe-Nx/C and Co-Nx/C exhibit excellent catalytic activity. Nevertheless, comprehensive understanding of these TM-N/C electrocatalytic systems is still lacking, which demands extension of investigation to other TM-N/C systems (Cu, and Mn, etc.). Herein, we developed a Cu promoted nitrogen-doped carbon (Cu-N/C) via high temperature pyrolysis of Cu-adsorbed zeolite imidazole frameworks (Cu@ZIF-8). The Cu-N/C electrocatalyst exhibited satisfactory ORR activity with half-wave potential of 0.813â¯V in 0.1â¯M KOH electrolyte. Moreover, it also showed excellent methanol tolerance and long-term stability. The enhanced ORR electrocatalytic performance is attributed to the strong synergetic effect between Cu(II)-N ligands and Cu0 NPs, sufficient active sites, and fast mass transfer.
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Authors
Yunchao Xie, Chi Zhang, Xiaoqing He, Jheng-Wun Su, Thomas Parker, Tommi White, Mark Griep, Jian Lin,