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- W2014027104 abstract "Abstract This study aims to enhance the direct carbon fuel cell (DCFC) efficiency by bubbling Ar gas in a carbon/carbonate slurry. The current discharge curve and CO and CO 2 production rates were measured during discharge at 20 mA cm −2 . When carbon content in carbonates ( W C/carbonate ) was 1.0 wt%, Ar bubbling decreased the CO/CO 2 production ratio from 0.16 to 0.051, and increased the CO 2 production rate, which approached the theoretical value for complete electrochemical oxidation of carbon. Moreover, bubbling increased the cell voltage by about 0.1 V at steady state. At W C/carbonate = 3.0 wt%, the CO/CO 2 production ratio without bubbling increased significantly to 8.5, indicating that partial electrochemical oxidation became dominant. The C/O 2− ratio is key for explaining the electrochemical oxidation of the carbon. When the C/O 2− ratio was low, such as at W C/carbonate = 1.0 wt%, complete electrochemical oxidation became dominant, and bubbling enhanced the complete electrochemical oxidation. When the C/O 2− ratio was high, such as at W C/carbonate = 3.0 wt%, partial electrochemical oxidation became dominant, and bubbling did not inhibit it. For W C/carbonate = 1.0 wt%, bubbling increased both coulombic and voltage efficiencies, resulting in an increase in total efficiency from 52% to 64%." @default.
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- W2014027104 date "2015-01-01" @default.
- W2014027104 modified "2023-09-24" @default.
- W2014027104 title "Enhancing the efficiency of direct carbon fuel cells by bubbling Ar gas in carbon/carbonate slurry" @default.
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- W2014027104 doi "https://doi.org/10.1016/j.jpowsour.2014.09.079" @default.
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