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Electrochemical reduction of CO2 and CO using interface-engineered Au/Ti electrodes for long-chain hydrocarbon production
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2023-06-17 , DOI: 10.1016/j.apcatb.2023.123017
Young Jun Kim , Ju Young Maeng , Seon Young Hwang , Choong Kyun Rhee , Youngku Sohn

This study demonstrates the electrochemical reduction of CO2 and CO using interface-engineered Au/Ti electrodes. Direct adsorption of CO and indirect processes in CO2 conditions were proposed to form surface CO. Surface H was formed from H+/H2O. Mimicking Fischer–Tropsch synthesis between surface CO and H resulted in the production of CH4 and hydrocarbons (CnH2n and CnH2n+2, n = 2–7). Faradaic efficiency of CO increased with increasing Au coverage and reached 38%. In CO2-saturated KHCO3, long-chain hydrocarbon production was observed on Au/Ti electrodes with low Au coverage. In CO2 and CO-saturated phosphate electrolytes, higher Au coverage resulted in higher production of long-chain hydrocarbons. The ratio of alkanes to alkenes increased with increasing Au coverage but decreased with applied potential. The study provides insights into interface engineering, electrochemical long-chain hydrocarbon production, and C−C coupling mechanisms.



中文翻译:

使用界面设计的 Au/Ti 电极电化学还原 CO2 和 CO,用于长链碳氢化合物生产

本研究展示了使用界面设计的 Au/Ti 电极对 CO 2和 CO进行电化学还原。提出了CO的直接吸附和CO 2条件下的间接过程以形成表面CO。表面H由H + /H 2 O形成。表面CO和H之间模拟费托合成导致产生CH 4和碳氢化合物( C n H 2n和 C n H 2n+2,n = 2–7)。CO 的法拉第效率随着 Au 覆盖率的增加而增加,达到 38%。在CO 2饱和的KHCO 3中,在具有低 Au 覆盖率的 Au/Ti 电极上观察到长链碳氢化合物的产生。在CO 2和CO饱和磷酸盐电解液中,较高的Au覆盖率导致长链烃的产量较高。烷烃与烯烃的比率随着金覆盖率的增加而增加,但随着施加电势的增加而减少。该研究提供了对界面工程、电化学长链碳氢化合物生产和 C−C 耦合机制的见解。

更新日期:2023-06-17
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