کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6472022 | 1424126 | 2017 | 10 صفحه PDF | دانلود رایگان |
- Co2P@CoNPGcompositewassynthesizedbysupramoleculargel-assistedstrategy.
- Multielement doped graphene was used as support to improve the conductivity of Co2P.
- Co2P@CoNPG exhibited superior bifunctional activities toward both ORR and OER.
- Co2P@CoNPG is a promising bifunctional catalyst for renewable energy systems.
Developing highly cost-effective bifunctional oxygen electrode catalysts for renewable energy technologies (e.g. metal-air batteries and fuel cells) is highly desirable but remains challenging. In this work, we demonstrate a novel composite of Co2P particles anchored in cobalt, nitrogen and phosphorus co-doped graphene nanosheets (Co2P@CoNPG) prepared via supramolecular gel-assisted strategy. In virtue of the positive synergistic effect originating from the Co2P, Co-Nx active sites and N/P co-functionalized graphene in the composite, the optimized Co2P@CoNPG-900 exhibits superior bifunctional activities and strong durability for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) in alkaline solution. The value of ÎE (bifunctional performance parameter) for Co2P@CoNPG-900 is only 0.92Â V. Compared to the noble metal-based catalysts, Co2P@CoNPG-900 has the obvious advantages in durability and bifunctional activities. The integration of Co2P and multielement co-doped graphene into a hybrid material is a new and promising strategy to design bifunctional oxygen electrode catalysts for renewable energy technologies.
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Journal: Electrochimica Acta - Volume 231, 20 March 2017, Pages 344-353