Isotopic labeling experiments were performed to better understand the electrochemical reduction of carbon dioxide on nitrogen-doped porous carbon electrodes. By using nonequilibrated solutions of selectively labeled initial carbon sources (i.e., 13CO2 and H13CO3-), bicarbonate anion was identified as the predominant source of the carbon monoxide reduction product.

中文翻译：

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氮掺杂碳上二氧化碳的电化学还原：同位素标记研究的真知灼见。

进行同位素标记实验以更好地了解氮掺杂多孔碳电极上二氧化碳的电化学还原。通过使用选择性标记的初始碳源（即13CO2和H13CO3-）的非平衡溶液，碳酸氢根阴离子被确定为一氧化碳还原产物的主要来源。