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Prolonged hydrogen production by engineered green algae photovoltaic power stations
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Prolonged hydrogen production by engineered green algae photovoltaic power stations
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Journal Article
Prolonged hydrogen production by engineered green algae photovoltaic power stations
2023
Overview
Interest in securing energy production channels from renewable sources is higher than ever due to the daily observation of the impacts of climate change. A key renewable energy harvesting strategy achieving carbon neutral cycles is artificial photosynthesis. Solar-to-fuel routes thus far relied on elaborately crafted semiconductors, undermining the cost-efficiency of the system. Furthermore, fuels produced required separation prior to utilization. As an artificial photosynthesis design, here we demonstrate the conversion of swimming green algae into photovoltaic power stations. The engineered algae exhibit bioelectrogenesis, en route to energy storage in hydrogen. Notably, fuel formation requires no additives or external bias other than CO
2
and sunlight. The cellular power stations autoregulate the oxygen level during artificial photosynthesis, granting immediate utility of the photosynthetic hydrogen without separation. The fuel production scales linearly with the reactor volume, which is a necessary trait for contributing to the large-scale renewable energy portfolio.
Cost, scalability, and durability are critical factors determining the application of artificial photosynthesis systems. Here, the authors address these problems by inserting a carbon nanofiber into the chloroplast of green algae to transfer of electrons for photosynthesis and demonstrate H2 production up to 50 days.
