碳上的二氧化原子和用于高性能乙醇和甲醇电氧化
Zhiqi Zhang1,2, Jiapeng Liu3,2, Shangqian Zhu4,5
1Key Laboratory of Energy Thermal Conversion and Control (Ministry of Education), School of Energy and Environment, Southeast University, Nanjing, P.R. China.
Angewandte Chemie (International ed. in English)
|July 22, 2025
概括
在添加碳纳米上配有双和原子的二进制原子位点催化剂 (DASC) 显示出对酒精氧化增强的电催化活性. 这一突破为开发用于酒精电氧化反应的高效催化剂提供了新的途径.
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:
- 双胞胎原子位点催化剂 (DASC) 具有多个分散的催化中心,但在酒精电氧化中表现出有限的电催化性能.
- 开发高效的催化剂对于推进酒精电氧化过程至关重要.
研究的目的:
- 为了合成和表征含有原子分散和在胺合碳纳米 (Pt1Pd1/NCNC) 的二位离子原子位点催化剂.
- 评估Pt1Pd1/NCNC的电催化活性和稳定性,用于乙醇和甲醇氧化.
主要方法:
- 浸吸附方法用于合成Pt1Pd1/NCNC.
- 电化学测试以评估乙醇和甲醇氧化的质量活性和产品选择性.
- 开始模拟以调查反应机制和能量障碍.
主要成果:
- 与商业Pt/C和Pd/C催化剂相比,Pt1Pd1/NCNC对乙醇和甲醇氧化的质量活性显著更高.
- 化碳纳米中的单原子Pt或Pd催化剂的活性可以忽略不计.
- 对乙醇和甲醇分别观察到完全的电氧化到乙酸离子和CO2,由于没有CO中间体,长期稳定性很好.
- 最初的模拟证实Pt1Pd1/NCNC优化了乙醇氧化路径,具有较低的能量障碍和开始潜力.
结论:
- 在添加的碳纳米上,原子分散的Pt-Pd对代表了用于高效的酒精电氧化二聚焦原子位点催化剂的有希望的类别.
- Pt和Pd原子之间的协同效应是增强催化性能的关键.
- 这项研究为设计用于各种电催化应用的先进DASC铺平了道路.
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