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CuCo2S4 hollow nanoneedle arrays supported on Ni foam as efficient trifunctional electrocatalysts for overall water splitting and Al–Air batteries.
- Source :
-
Journal of Alloys & Compounds . Dec2020, Vol. 845, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Design and synthesis of multi-functional electrocatalysts with high efficiency and low cost to replace noble metals are significantly important to realize new energy technologies. Herein, we report CuCo 2 S 4 hollow nanoneedle arrays as efficient trifunctional electrocatalysts for overall water splitting and aluminium-air batteries. CuCo 2 S 4 hollow nanoneedle arrays are grown on Ni foam (NF) via a facile hydrothermal method. Benefiting from the porous and hollow structure to expose more active sites, the CuCo 2 S 4 /NF hollow nanoneedle arrays exhibit superior electrocatalytic performance for hydrogen evolution (HER), oxygen evolution (OER), oxygen reduction reactions (ORR) in alkaline electrolytes. The corresponding experimental HER and OER overpotentials of CuCo 2 S 4 /NF catalyst are 61 mV and 189 mV at 10 mA cm−2 in 1.0 M KOH. In an assembled primary Al-air battery, the CuCo 2 S 4 /NF catalysts demonstrate an outstanding peak power density of 160 mW cm−2. This work provides a new strategy for developing non-noble metal multiple-functional catalysts for energy conversion and energy storage devices. Image 1 • Hollow nanoarrays copper-cobalt intermetallic sulfide on Ni foam are synthesized. • CuCo 2 S 4 exhibit synergistic electrocatalytic activity for HER, OER and ORR. • Al-air batteries self power the two-electrode configuration during water splitting. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 845
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 145437907
- Full Text :
- https://doi.org/10.1016/j.jallcom.2020.155392