Abstract
Carbon is an important energy carrier. It is abundant in the world, existing richly in coal and biomass. Its energy is released mainly through oxidation. A heat energy of ∼393 kJ may be obtained from the complete oxidation of 1 mol of carbon. The most conventional method of carbon oxidation is combustion, which has the problems of pollutant emission and low efficiency. However, through electrochemical oxidation, the chemical energy of carbon can be converted into electricity with high efficiency and low pollution. Herein, we give a brief review of our work on a novel technology of generating electricity and carbon monoxide from electrochemical oxidation of carbon through a solid oxide fuel cell (SOFC) at high temperature. This so-called direct carbon SOFC (DC-SOFC) has an all-solid-state configuration without any purging gas or liquid medium. Electricity is generated by coupling of the electrochemical oxidation of CO at the anode and the reverse Boudouard reaction at the carbon fuel. Meanwhile, gaseous CO...
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