Wang Hongfei, Zhang Fusen, Li Yang, Pang Yingping, Zhao Xiqiang, Song Zhanlong, Wang Wenlong, Sun Jing, Mao Yanpeng
National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China.
National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt C):506-514. doi: 10.1016/j.jcis.2024.09.117. Epub 2024 Sep 15.
Electrocatalytic CO reduction reaction (CORR) is a process in which CO is reduced to high-value-added C and C energy sources, particularly ethylene (CH), thereby supporting carbon-neutral recycling with minimal consumption. This makes it a promising technology with significant potential. Nevertheless, the low selectivity for CH remains a significant challenge in practical applications. In this paper, a strategy based on Cu-Sn bimetallic catalysts is proposed to improve the selectivity of electrocatalytic conversion of CO to CH over Cu-based catalysts. The experimental results show that the Faradaic efficiency (FE) of CH can reach up to 48.74 %, and the FE of C product reaches 60 %, at which time the local current density is 11.99 mA/cm. Compared with pure Cu catalyst, the FE and local current density of CH increased by 55.27 % and 35.33 %, respectively. Moreover, the FE of CH remained above 40 % after 8 h over Cu-Sn catalyst. The addition of Sn facilitates the transfer of local electrons from Cu to Sn, stabilizes the *CO intermediate, promotes CC coupling, significantly lowers the reaction energy barrier, and enables highly efficient CORR catalysis for CH production.
电催化CO还原反应（CORR）是一个将CO还原为高附加值C和C能源（特别是乙烯（CH））的过程，从而以最小的消耗支持碳中性循环利用。这使其成为一项具有巨大潜力的有前景的技术。然而，在实际应用中，对CH的低选择性仍然是一个重大挑战。本文提出了一种基于Cu-Sn双金属催化剂的策略，以提高在Cu基催化剂上CO电催化转化为CH的选择性。实验结果表明，CH的法拉第效率（FE）可达48.74%，C产物的FE达到60%，此时局部电流密度为11.99 mA/cm²。与纯Cu催化剂相比，CH的FE和局部电流密度分别提高了55.27%和35.33%。此外，在Cu-Sn催化剂上反应8小时后，CH的FE仍保持在40%以上。Sn的加入促进了局部电子从Cu向Sn的转移，稳定了*CO中间体，促进了C-C偶联，显著降低了反应能垒，并实现了用于CH生成的高效CORR催化。
