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热力学混合导向的-锡Janus催化剂用于持久的电催化CO2降低

Miao Wang¹, Shuai Liu², Yiran Liu³

¹Department of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China.

Angewandte Chemie (International ed. in English)

|August 25, 2025

概括

研究人员开发了一种新的Janus Bi-Sn催化剂,用于有效的电化学二氧化碳 (CO2) 减少. 这种富含接口的催化剂表现出高性能和稳定性,为二氧化碳转化提供了有前途的策略.

科学领域:

不同质的催化
电化学
材料科学

背景情况:

双金属催化剂的接口对于活性点和电荷转移至关重要.
设计具有暴露活性位点的丰富接口的催化剂,以减少二氧化碳是具有挑战性的.
具有双功能表面的Janus催化剂可以通过优化电子结构和通路来提高二氧化碳的减少.

研究的目的:

使用现场电还原方法构建纳米尺寸的Janus Bi-Sn催化剂.
研究界面在催化剂性能和稳定性的作用.
探索用于制造Janus催化剂的现场电还原策略的普遍性.

主要方法:

在现场电还原合成纳米尺寸的Janus Bi-Sn催化剂.
在H型电池中进行电化学测试,以评估二氧化碳减排性能.
开始分子动力学 (AIMD) 模拟以研究热力学混合性和接口形成.
制造Janus Cu-Sn和Cu-Co催化剂以验证该方法的通用性.

主要成果:

在Janus Bi-Sn催化剂中,高法拉达效率 (FE) 的酸盐 (HCOO-) 在-0.9V时达到95.5%.
催化剂表现出了显著的结构稳定性,在H型细胞中持续了310小时.
AIMD模拟证实了Bi和Sn之间的良好热力学混合性,减少了原子分离.
Bi-Sn接口优化了Sn的p-轨道能量水平,减少了HCOO*吸附的自由能量.
在现场电还原策略被成功应用到创建Janus Cu-Sn和Cu-Co催化剂.

结论:

开发的纳米尺寸的Janus Bi-Sn催化剂有效地提高了电化学二氧化碳的减少.
现场电还原方法是设计非珍贵的Janus催化剂的通用策略.
在Janus催化剂中的接口工程为高效的二氧化碳转化提供了一个有前途的途径.

关键词:

二氧化碳的电减格式化接口雅努斯结构热力学混合性

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