ZIF-derived Co–N–C ORR catalyst with high performance in proton exchange membrane fuel cells

Progress in Natural Science: Materials International

Yuesheng Wang¹  Zhiyou Zhou²  Karim Zaghib²  Yucheng Wang³  Pengyang Zhang³  Ruixiang Wang³ 

[1] Corresponding author.;Center of Excellence in Transportation Electrificationand Energy Storage Hydro Québec, Québec, J3 × 1S1, Canada;State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China;

关键词: Non-precious metal electrocatalysts;    Fuel cell;    Oxygen reduction;    Co-based catalyst;    ZIF-8;   

DOI  :  

来源: DOAJ

【 摘 要 】

Metal and nitrogen-doped carbon (M-N-C) materials have been considered as the most promising non-precious metal oxygen reduction (ORR) catalysts to replace expensive Pt catalysts. Due to high Fenton catalytic activity of Fe element and the resulting instability, Co-based N–C (Co–N–C) catalysts without Fenton catalytic activity should be a worthier ORR catalyst being explored. Although the high ORR activity of Co–N–C catalyst has been demonstrated in aqueous half-cell tests, their performance under PEMFC working condition is still far away from that of state-of-the-art Fe–N–C catalysts. In this study, a high-performance Co–N–C catalyst was synthesized by one-step pyrolyzing Co-doped ZIF-8 (zeolitic imidazolate framework-8) particles in-situ grown on the high-surface-area KJ600 carbon black with high electronic conductivity. The resulting Co–N–C catalyst exhibited high intrinsic ORR activity, fast mass transfer rate and high electronic conductivity, and thus yielded a remarkable peak power density of 0.92 W cm-2 in H2–O2 PEMFC, which is comparable to state-of-the-art Fe–N–C catalyst. This strategy is helpful to synthesize highly active M-N-C ORR catalysts with improved mass transfer and electric conductivity.

【 授权许可】

Unknown