高负荷单原子催化剂的室温激光植入,以实现高效电催化演变
Bing Wang1, Xi Zhu2, Xudong Pei3
1National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory for Nano Technology, Eco-materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing 210093, P.R. China.
Journal of the American Chemical Society
|June 9, 2023
概括
一种新的激光种植方法在各种基板上实现了创纪录的单原子负荷. 这种技术为能量转换应用创造了具有增强催化活性的高单个原子.
科学领域:
- 材料科学
- 催化剂
- 纳米技术
背景情况:
- 单原子催化 (SAC) 提供了高效率,但在基板上较低的单原子 (SA) 负荷方面存在困难.
- 在催化研究中,开发高密度SA定方法仍然是一个重大挑战.
研究的目的:
- 引入一步激光植入策略,在多种基板上制造高负载单个原子 (SAs).
- 研究高单原子 (HESA) 的合成及其催化性能.
- 建立高级SA催化剂的一般和环境条件路径.
主要方法:
- 在大气条件下使用一步激光种植技术.
- 使用激光脉冲同时创建缺陷和前体分解以定SA.
- 合成高单个原子 (HESA) 与共存的多种金属SA.
- 进行综合实验和理论研究,以将HESA成分与催化性能相关联.
主要成果:
- 由于激光种植造成的高缺陷密度,实现了创纪录的41.8%的SA负载.
- 在各种基板 (碳,金属,氧化物) 上成功合成了HESA与多种金属SA.
- 与商业Pt/C相比,在HESA中表现出11倍高的贵金属质量活性.
- 通过与火山图表性能分布的相关性确定了最佳的HESA组成.
结论:
- 激光植入策略提供了一个强大的,简单的和一般的方法来生产高密度的SA和HESA.
- 这种方法可以在环境条件下在各种基板上制造低成本的SA催化剂.
- 这些发现为能源转换应用中先进的电催化剂铺平了道路.
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