本发明公开了一种利用直流电源电泳沉积合成维生素B12/碳纳米管复合材料的方法及其电催化还原二氧化碳性能研究。本发明利用碳纳米管和维生素B12，在室温下即可制备维生素B12/碳纳米管复合材料，其制备方法简单，反应温和，耗能小，合成步骤少，操作简单。经过测试电催化还原二氧化碳性能发现，本发明方法制备的维生素B12/碳纳米管复合材料具有较好的二氧化碳还原性能，其在最佳还原电位‑0.85 V/标准氢电极下，产物一氧化碳的法拉第效率最高达96.82%，一氧化碳的分电流密度达到41.21 mA cm‑2，且其稳定性良好。
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