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Electrostatic promotion of the catalyst activity for ammonia photosynthesis upon a robust affordable nanostructured uni-electrodic photodevice/reactor

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Abstract

Nitrogen photo-fixation, under ambient conditions using low-price, earth-abundant, and eco-friendly nanostructured solar-energy materials and water feedstock, is a sustainable strategy to produce ammonia—a modern, safe, green, and H-based fuel as well as principal nitrogen supply for living organisms. To this end, herein, the authors fabricated a robust, stand-alone FeS2/Cu monolithic photoelectrochemical device, which is able to continually photosynthesize ammonia while N2 molecules reaching the photodevice surface. Furthermore, it is reported for the first time that without consuming electricity [electron flow; faradaic process], just by applying a non-faradic/electrostatic potential bias to the device or adding a promoter species into the reaction medium, the activity of the photodevice to synthesize ammonia can be substantially enhanced [promotion: up to ∼131%]. Finally, through a photoelectrochemical approach and providing extra supporting evidence, the phenomenon is interpreted in detail from basic viewpoints.

Graphical abstract: Electrostatic promotion of the catalyst activity for ammonia photosynthesis upon a robust affordable nanostructured uni-electrodic photodevice/reactor

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Article information


Submitted
28 Jun 2020
Accepted
17 Sep 2020
First published
14 Oct 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Electrostatic promotion of the catalyst activity for ammonia photosynthesis upon a robust affordable nanostructured uni-electrodic photodevice/reactor

M. Lashgari and P. Zeinalkhani, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY01291B

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