Journal
AGGREGATE
Volume 2, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/agt2.17
Keywords
carbon coating; OER; porous electrocatalyst; self-assembly; supraparticle
Funding
- NSFC [22025501, 21872038, 21733003, 51773042]
- MOST [2020YFB1505803, 2017YFA0207303]
Ask authors/readers for more resources
This study successfully designed and prepared hierarchically structured Ni0.4Fe2.6O4 carbon-coated nanoparticle superlattice microspheres using a double emulsion template method, exhibiting higher efficiency in oxygen evolution compared to traditional electrocatalysts. The high-temperature calcination process transformed organic capping ligands into uniform carbon coatings, improving the electrochemical properties. These superstructures showed superior long-term cyclic stability, providing new insights into the design of efficient water splitting catalysts.
Developing active and robust non-noble-metal-based electrocatalysts for the oxygen evolution reaction (OER) is of vital practical significance for accelerating the kinetics of water splitting. Here, a novel double emulsion template method is proposed to design and prepare hierarchically multichambered, carbon-coated Ni0.4Fe2.6O4 nanoparticle superlattice microspheres (M-NFO@C-NSMs) for the highly efficient oxygen evolution. The high-temperature calcination under inert gas enables an improved electrochemical property by rationally transforming the long-chain organic capping ligands into partially graphitized uniform carbon coatings. More importantly, benefiting from the unique hierarchical superstructure with macro-/meso-/microporosities and three-dimensional continuous conductive carbon frameworks, M-NFO@C-NSMs exhibit comprehensively enhanced OER activity in a dilute alkaline electrolyte as compared to their solid counterparts and most spinel-based electrocatalysts reported to date. Notably, the collective property of supraparticles endowed M-NFO@C-NSMs with superior long-term cyclic stability. This work sheds light on the sophisticated design of functionalized supraparticles for efficient water splitting.
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