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| Home > Publications database > CO2 electroreduction to syngas with tunable composition in an artificial leaf |
| Journal Article | FZJ-2023-05055 |
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2024
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/cssc.202301398 doi:10.34734/FZJ-2023-05055
Abstract: Artificial leaves (a-leaves) can reduce carbon dioxide into syngas using solar power and could be combined with thermo- and biocatalytic technologies to decentralize the production of valuable products. By providing variable CO:H2 ratios on demand, a-leaves could facilitate optimal combinations and control the distribution of products in most of these hybrid systems. However, the current design procedures of a-leaves concentrate on achieving high performance for a predetermined syngas composition. This study demonstrates that incorporating the electrolyte flow as a design variable enables flexible production without compromising performance. The concept was tested on an a-leaf using a commercial cell, a Cu2O:Inx cathodic catalyst, and an inexpensive amorphous silicon thin-film photovoltaic module. Syngas with CO:H2ratio in the range of 1.8-2.3 could be attained with only 2% deviation from the optimal cell voltage and controllable solely by catholyte flow. These features could be beneficial for downstream technologies such as Fischer Tropsch synthesis and anaerobic fermentation.
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