压力诱导的质子合电子转移步骤的前向转移提高了CO-到酸盐的吞吐量
Jian Jin1, Ruihu Lu2, Jiayang Song1
1School of Environmental Science and Engineering, School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|March 2, 2026
概括
通过压力调制来设计微环境,可以增强CO电减. 升高的CO压力促进了酸盐的产生,而不是的演变,在稳定的铜单原子合金催化剂系统中实现了高选择性和效率.
科学领域:
- 催化科学 催化科学
- 电触媒溶解是一种电触媒.
- 表面化学 表面化学
背景情况:
- 速度决定步骤 (RDS) 对催化效率和选择性至关重要.
- 由于电压不敏感的*CO-*CO二极化,限制了CO/CO2电降解,阻碍了多碳生产.
- 常规催化剂的修改往往会对下游反应产生负面影响.
研究的目的:
- 开发一个物理微环境工程战略,用于CO电减排.
- 通过调节压力来重新配置反应路径.
- 为了克服*CO-*CO二聚化在多碳生产中的局限性.
主要方法:
- 通过压力调制进行物理微环境工程.
- 使用合成铜单原子合金 (Cu-Pd SAA) 催化剂.
- 高压操作拉曼光谱分析反应中间体和通路.
主要成果:
- 升高的CO压力重定向了质子反应路径,有利于*CO化而不是二元化.
- 对酸盐和化中间体观察到较小的塔菲尔斜率.
- 实现了85%的法拉达效率,用于CO转化为乙酸盐,具有33%的能效和700小时的稳定性.
- 在广泛的电流密度范围 (3-1500 mA cm−2) 中保持了>75%的酸盐选择性.
结论:
- 压力调制是设计微环境和控制电催化路径的有效策略.
- 该Cu-Pd SAA催化剂系统显示了高的选择性,效率和稳定性,用于CO转化为乙酸盐.
- 该系统的广泛电流密度兼容性表明了与间歇性可再生能源集成的潜力.
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