阶段的结构进化控制电化学CO2 减少对双金属Cu-doped金纳米集群的减少
Enric Ibáñez-Alé1,2, Jiajun Hu3, Josep Albero3
1Institute of Chemical Research of Catalonia, (ICIQ-CERCA), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, Tarragona, 43007, Spain.
Small (Weinheim an der Bergstrasse, Germany)
|December 3, 2024
概括
铜合金纳米集群显示了增强的电化学二氧化碳减排. Cu-doped Au144 集群表现出优越的 CO 选择性,突出显示了双金属纳米集群催化剂设计中连接体稳定的作用.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 合物保护的金纳米集群为电化学二氧化碳减排 (eCO2R) 提供可调节的特性.
- 与纳米集群相比,多晶催化剂往往缺乏选择性控制.
研究的目的:
- 研究剂类型 (Ag,Cu) 和集群大小 (Au25,Au144) 对eCO2R性能的影响.
- 阐明联体动力学,集群曲率和主干结构在催化活性中的作用.
主要方法:
- 用Ag或Cu合的Au25(SR) 18和Au144(SR) 60纳米集群的合成和表征.
- 对二氧化碳减排的催化性能进行电化学评估.
- 密度函数理论 (DFT) 模拟来分析反应机制和中间稳定.
主要成果:
- Cu-doped Au144 (((SR) 60 在 -0.8 VRHE 时显示出产生 CO 的最高活性.
- 确定了连接体去除动态和集群曲作为影响性能的关键因素.
- 用剂合的Au25(SR) 18显示出酸盐的产生,但碳排放选择性较低.
结论:
- 连接物稳定性对于优化eCO2R的双金属金纳米催化剂至关重要.
- Cu-doped Au144纳米集群代表了选择性CO生产的有前途的催化剂系统.
- 了解动态连接体效应是设计下一代eCO2R催化剂的关键.
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