单原子催化剂的流体热解合成与可调节的曲和电子结构为2电子氧降低的电子结构
Guanchao He1, Xinyu Bai2, Pu Wang2
1State Key Laboratory of Chemo and Biosensing, and College of Chemistry and Chemical Engineering, Hunan University, Changsha, P. R. China.
Angewandte Chemie (International ed. in English)
|March 7, 2026
概括
一种新的连续流喷雾热解法合成了具有可调节结构的单原子催化剂 (SAC). 这种方法可以精确控制催化剂的特性,以提高像氧降解反应 (ORR) 这样的反应的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 单原子催化剂 (SAC) 提供高金属利用效率,但需要具有可调节结构的易于合成方法.
- 控制SAC的几何和电子特性对于优化其催化活性至关重要.
研究的目的:
- 开发一种通用且简单的连续流喷 pyrolysis 方法来合成 SACs.
- 为了证明对石墨烯基底的纹结构和单原子位的电子结构的控制.
- 为了优化2电子氧降解反应 (ORR) 的SAC.
主要方法:
- 连续流喷雾热解,用于同时形成单原子位和基板形态工程.
- 合成各种SAC,包括Fe,Co,Ni,Cu和Pt.
- 对ORR的催化剂结构-活性关系的表征.
主要成果:
- 在单个步骤中同时形成单原子位点和基板工程.
- 可调节的电子和几何结构的Co SACs依赖于石墨烯基底缩.
- 优化Co SAC实现了高质量活性 (456 ± 4 A g-1) 和H2O2选择性 (97%) 的ORR.
- 流电池电解仪在120小时内证明了持续的H2O2生产率 (23.78mol g-1催化剂h-1).
结论:
- 连续流喷雾热解法为制造可调节的SAC提供了一个多功能平台.
- 优化的Co SAC对2电子ORR表现出色,产生高的H2O2选择性和生产力.
- 这项工作为SAC在电化学过程中的实际应用铺平了道路.
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