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二氧化碳電化學還原反應

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二氧化碳電化學還原反應是使用電化學手段二氧化碳(CO2)還原的反應,它是碳捕獲與利用英語Carbon capture and utilization的最有前途手段之一。[1]

二氧化碳電化學還原可以得到特定的有機物或燃料,如甲酸[2]一氧化碳甲烷乙烯乙醇等。[3][4][5]金屬催化劑中,可以選擇性催化生成甲酸可以產生一氧化碳,產生甲烷乙烯乙醇。儘管甲醇、丙醇丁醇也可能在二氧化碳電化學還原中產生,但產量較少。[6]

電催化

一些產物的還原電位見下表:

反應 還原電位[7]

Eo (V)

CO2 + 2 H+ + 2 e → HCOOH −0.61
CO2 + 2 H+ + 2 e → CO + H2O −0.53
CO2 + 8 H+ + 8 e → CH4 + 2 H2O −0.24
2 CO2 + 12 H+ + 12 e → C2H4 + 4 H2O −0.349
2 CO2 + 12 H+ + 12 e → C2H5OH + 3 H2O −0.329

參考文獻

  1. ^ Dream or Reality? Electrification of the Chemical Process Industries. www.aiche-cep.com. [2021-08-22]. (原始內容存檔於2021-07-17) (英語). 
  2. ^ Valenti G, Melchionna M, Montini T, Boni A, Nasi L, Fonda E, et al. Water-Mediated ElectroHydrogenation of CO2 at Near-Equilibrium Potential by Carbon Nanotubes/Cerium Dioxide Nanohybrids. ACS Appl. Energy Mater. 2020, 3 (9): 8509–8518. doi:10.1021/acsaem.0c01145可免費查閱. 
  3. ^ Centi G, Perathoner S. Opportunities and prospects in the chemical recycling of carbon dioxide to fuels. Catalysis Today. 2009, 148 (3–4): 191–205. doi:10.1016/j.cattod.2009.07.075. 
  4. ^ Qiao J, Liu Y, Hong F, Zhang J. A review of catalysts for the electroreduction of carbon dioxide to produce low-carbon fuels. Chemical Society Reviews. January 2014, 43 (2): 631–75. PMID 24186433. doi:10.1039/c3cs60323g. 
  5. ^ Appel AM, Bercaw JE, Bocarsly AB, Dobbek H, DuBois DL, Dupuis M, et al. Frontiers, opportunities, and challenges in biochemical and chemical catalysis of CO2 fixation. Chemical Reviews. August 2013, 113 (8): 6621–58. PMC 3895110可免費查閱. PMID 23767781. doi:10.1021/cr300463y. 
  6. ^ Ting LR, García-Muelas R, Martín AJ, Veenstra FL, Chen ST, Peng Y, et al. Electrochemical Reduction of Carbon Dioxide to 1-Butanol on Oxide-Derived Copper. Angewandte Chemie. November 2020, 59 (47): 21072–21079. PMC 7693243可免費查閱. PMID 32706141. doi:10.1002/anie.202008289. 
  7. ^ Sun Z, Ma T, Tao H, Fan Q, Han B. Fundamentals and Challenges of Electrochemical CO2 Reduction Using Two-Dimensional Materials. Chem. 2017, 3 (4): 560–587. doi:10.1016/j.chempr.2017.09.009可免費查閱. 

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