Binary Nitrogen Precursor-Derived Porous Fe-N-S/C Catalyst for Efficient Oxygen Reduction Reaction in a Zn-Air Battery

Catalysts

Xiao Liu¹  Liangliang Zou¹  Hui Yang¹  Qingqing Cheng¹  Zhiqing Zou¹  Chi Chen¹ 

[1] Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;

关键词: non-precious metal catalyst;    oxygen reduction reaction;    binary nitrogen precursors;    g-C3N4;    2,4,6-tri(2-pyridyl)-1,3,5-triazine;   

DOI  :  10.3390/catal8040158

来源: DOAJ

【 摘 要 】

It is still a challenge to synthesize non-precious-metal catalysts with high activity and stability for the oxygen reduction reaction (ORR) to replace the state-of-the art Pt/C catalyst. Herein, a Fe, N, S co-doped porous carbon (Fe-NS/PC) is developed by using g-C3N4 and 2,4,6-tri(2-pyridyl)-1,3,5-triazine (TPTZ) as binary nitrogen precursors. The interaction of binary nitrogen precursors not only leads to the formation of more micropores, but also increases the doping amount of both iron and nitrogen dispersed in the carbon matrix. After a second heat-treatment, the best Fe/NS/C-g-C3N4/TPTZ-1000 catalyst exhibits excellent ORR performance with an onset potential of 1.0 V vs. reversible hydrogen electrode (RHE) and a half-wave potential of 0.868 V (RHE) in alkaline medium. The long-term durability is even superior to the commercial Pt/C catalyst. In the meantime, an assembled Zn-air battery with Fe/NS/C-g-C3N4/TPTZ-1000 as the cathode shows a maximal power density of 225 mW·cm−2 and excellent durability, demonstrating the great potential of practical applications in energy conversion devices.

【 授权许可】

Unknown