期刊
CHEMELECTROCHEM
卷 9, 期 10, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202200045
关键词
hydrazine oxidation; electrocatalysis; corroles; carbon; hierarchical porosity
资金
- Israel Science Foundation [2430/19]
- Grand Technion Energy Program
- Israel National Research Center for Electrochemical Propulsion
- Pazy Foundation (ZG)
We have designed efficient electrocatalysts for alkaline hydrazine oxidation reaction (HzOR) by controlling the active site and supporting scaffold. These catalysts exhibit excellent activity and hierarchical porous structure, showcasing the importance of metallocorroles in the nitrogen cycle.
Hydrazine is a promising energy-dense fuel for alkaline fuel cells. To design efficient and affordable electrocatalysts for the hydrazine oxidation reaction (HzOR), one needs to control both the active site and the supporting scaffold. We now report a family of electrocatalysts for alkaline HzOR, consisting of atomically dispersed Fe-N-4 sites (as iron corroles of varying sizes) on hierarchically porous, electronically conductive carbon scaffolds that were prepared by self-templating from a novel barium-based precursor. The orthogonal design of active sites and flow-enhancing scaffolds allowed the rational optimization of their combination, to achieve excellent HzOR activity. These catalysts demonstrate the utility and versatility of metallocorroles for electrocatalysis in the nitrogen cycle, as well as the importance of pore tuning for optimization of the current density.
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