Journal
JOURNAL OF POWER SOURCES
Volume 521, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.230925
Keywords
Cellulose nanofibers; Fe embedded bimetal-ZIFs; Trifunctional electrocatalyst; Zn-air battery; Overall water-splitting
Funding
- National Natural Science Foundation of China [21771192]
- Taishan Scholar Program of Shandong Province [ts201712019]
- Qingdao Applied Basic Research Project [19-6-2-20-cg]
- Yankuang Group 2019 Science and Technology Program [YKKJ2019AJ11JG-R66]
Ask authors/readers for more resources
A novel strategy for constructing high-efficient electrocatalyst is reported, which involves pyrolysis of cellulose nanofibers (CNFs) coated with bimetal-zeolitic imidazolate frameworks (ZIFs) of ZIF-67/ZIF-8. The resulting FeZn4Co@CNFs catalyst exhibits excellent catalytic activity and cycling stability, and outperforms Pt/C and RuO2 catalysts.
A novel Nucleation growth & Spatial isolation strategy is reported to construct the high-efficient multifunctional electrocatalyst via pyrolysis of the cellulose nanofibers (CNFs) coating with Fe embedded bimetal-zeolitic imidazolate frameworks (ZIFs) of ZIF-67/ZIF-8. Taking advantages of strategically structural design effectively inhibits Fe/Co metal species migration and agglomeration during the pyrolysis process, deriving the nanoscale-dispersed CoFe2O4/CoFe active sites and abundant mesoporous structure which ensures more effective exposure in the optimized FeZn4Co@CNFs sample. With a half-wave potential E-1/2 of 0.84 V for oxygen reduction reaction (ORR), small overpotential 0.36 V and 0.20 V for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively, FeZn4Co@CNFs presents the one of most Fe/Co-based trifunctional electrocatalysts reported to date, also is comparable to the benchmark Pt/C and RuO2 catalysts. Furthermore, a rechargeable FeZn4Co@CNFs-based Zn-air battery endows a high power density of 107.6 mW cm(2) and an outstanding cycling stability. Remarkably, the overall water-splitting is successfully driven by FeZn4Co@CNFs-based Zn-air batteries for generating H-2 and O-2 bubbles. Our finding provides a new guidance to strategic design and develop nanoscale-dispersed active sites in non-noble metal trifunctional electrocatalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available