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CeO_x- 综合双位点增强的尿素电合成从酸盐和二氧化碳

Xu Wu¹, Yang Chen², Bing Tang³

¹State Key Laboratory of Green Pesticide, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China.

Nature communications

|October 2, 2025

概括

这项研究引入了一种新的电催化剂 (CuSn/CS-1),用于从酸盐和二氧化碳减排中有效合成尿素. 催化剂实现了高尿素产量和法拉第效率,克服了以前可持续化学生产的局限性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

传统的尿素合成 (Bosch-Meiser) 是能源密集型的.
通过酸盐和二氧化碳的联合减少,电催化尿素合成提供了一个可持续的替代方案.
同时实现高收益率和法拉第效率仍然是一个挑战.

研究的目的:

开发一种用于高效的尿素合成的双功能电催化剂.
为了研究酸盐和二氧化碳共同减少的催化机制.
为了克服尿素产量和法拉第效率之间的权衡.

主要方法:

在CeOx/SiO2复合载体 (CS) 上集成Cu和Sn原子位点.
用于表征的光谱技术 (例如XPS,XAS).
密度函数理论 (DFT) 计算以阐明反应机制.

主要成果:

CuSn/CS-1催化剂表现出独特的电子特性和丰富的氧气空缺.
位方便二氧化碳转化为*CO,而Sn位则稳定从酸盐减少中形成的*NH2.
实现了55.81 mmol g-1 cat. 的尿素产量. h-1 和 79.27% 法拉代效率在 -0.7 V 与 RHE 相比.

结论:

设计的双功能活性位点和氧气空隙提高了电催化性能.
CuSn/CS-1催化剂有效地克服了尿素合成中的产量效率权衡.
提出了电催化尿素生产的可行和可持续的战略.

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