对CO2的时间分辨率产品观测使用同步电化学-质谱与软电离 (sEC-MS-SI) 的电还原
Guohui Zhang1,2, Anthony Kucernak1
1Department of Chemistry, Imperial College London, White City Campus, London, W12 0BZ, United Kingdom.
Angewandte Chemie (International ed. in English)
|October 6, 2023
概括
了解电化学二氧化碳减排 (CO2 RR) 需要快速的产品分析. 带有软电离 (SI) 的同步电化学质谱 (sEC-MS) 允许实时CO2 RR产品识别和动力分析.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 分析化学 分析化学
背景情况:
- 对电化学二氧化碳减排 (CO2 RR) 的机械理解对于开发高效的催化剂至关重要.
- 目前的表征方法缺乏实时产品分析所需的速度和相关能力.
- 准确的产品分布数据对于揭示CO2 RR活动和选择性至关重要.
研究的目的:
- 开发一种时间解决方法来识别二氧化碳RR产品.
- 为了能够直接观察二氧化碳,免受二氧化碳碎片干扰.
- 为了揭示动态信息并了解CO2 RR的动态.
主要方法:
- 同步电化学质谱法 (sEC-MS) 用于时间解析的产品识别.
- 为质谱学 (MS) 开发了一种软电离 (SI) 策略,专门检测二氧化碳.
- 在不同的电化学条件下对产品形成中的短暂物质的分析.
主要成果:
- sEC-MS成功地捕获了二氧化碳RR产品形成中的实时瞬态.
- 该SI策略允许对CO进行直接和无干扰的观察.
- 确定了多种产品的动力参数 (Tafel斜率,开始潜力).
- 表面覆盖面的潜在驱动变化被确定为产品进化中的歇斯底里源.
结论:
- sEC-MS-SI为 CO2 RR 的实时表征提供了一个强大的工具.
- 该方法提供了关于二氧化碳RR产品的动态形成路径和动力学的见解.
- 这种方法有助于更深入地理解减少二氧化碳的机制.
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