调整 C1 /C2 选择性 CO2 电化学 减少 在现场演化 CuO/SnO2 异构结构
Min Wang1, Huimin Chen1, Min Wang2
1Nanomaterials and Electrocatalysis Laboratory, College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, 266042, P. R. China.
Angewandte Chemie (International ed. in English)
|July 24, 2023
概括
异构氧化物在二氧化碳电化学还原 (CO2 ER) 过程中发生变化. 这项研究揭示了在潜在条件下CuO/SnO2重建如何产生不同的产品,指导CO2转换的催化剂设计.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 异构氧化物是二氧化碳电化学减排 (CO2 ER) 的有效催化剂.
- 这些催化剂可以在工作条件下进行结构重建,使机制研究和催化剂设计复杂化.
- 了解现场结构演变对于优化CO2 ER至关重要.
研究的目的:
- 在电化学潜力下阐明CuO/SnO2催化剂的结构重建.
- 揭示现场进化异构结构与CO2 ER产品选择性之间的关系.
- 为选择性减少二氧化碳的合理催化剂设计提供见解.
主要方法:
- 电化学表征的电化学表征
- 在现场拉曼光谱学.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 在 -0.85 VRHE 时,CuO/SnO2 重建为Cu2O/SnO2,产生高 HCOOH 选择性 (54.81% FE).
- 在1.05 VRHE下进一步重建Cu/SnO2-x显著提高了乙醇选择性 (39.8% FE).
- DFT计算证实了Cu/SnO2-x接口的协同中间吸收有利于乙醇生产的C-C合.
结论:
- 电化学潜力驱动CuO/SnO2催化剂中的特定结构重建.
- 进化的异构结构与CO2 ER产品选择性直接相关.
- 这项工作为设计用于有针对性的二氧化碳转换的先进催化剂提供了一条途径.
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