二氧化碳电化学还原的研究进展
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白晓芳,陈为,王白银,冯光辉,魏伟,焦正,孙予罕
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Recent Progress on Electrochemical Reduction of Carbon Dioxide
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Xiao-Fang BAI,Wei CHEN,Bai-Yin WANG,Guang-Hui FENG,Wei WEI,Zheng JIAO,Yu-Han SUN
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| 表1 CO2电化学还原的半反应及对应的电极电位7 |
| Table 1 Half reactions and potentials of CO2 electrochemical reduction reactions7. |
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| Electrochemical thermodynamic half-reactions | Electrode potential/V (vs RHE) | | CO2 + H2O + 2e- → CO + 2OH- | -0.10 | | CO2 + 2H2O + 2e- → HCOOH + 2OH- | -0.20 (pH < 4); -0.20 + 0.059 (pH > 4) | | CO2 + 3H2O + 4e- → HCHO + 4OH- | -0.07 | | CO2 + 5H2O + 6e- → CH3OH + 6OH- | 0.02 | | CO2+6H2O+8e- → CH4 + 8OH- | 0.17 | | 2CO2 + 8H2O + 12e- → C2H4 + 12OH- | 0.08 | | 2CO2 + 9H2O + 12e- → CH3CH2OH + 12OH- | 0.09 |
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