在温和条件下通过离合机制使固定在纯水中的表面等离子体
Canyu Hu1, Xing Chen2, Jianbo Jin1
1Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory , University of Science and Technology of China , Hefei , Anhui 230026 , People's Republic of China.
Journal of the American Chemical Society
|May 1, 2019
概括
在温和条件下,表面等离子能通过离合途径激活气 (NN). 这一突破使得使用新型AuRu纳米结构而无牺牲剂的氨能有效生产.
科学领域:
- 材料科学
- 催化剂
- 表面化学
背景情况:
- 在环境条件下固对于可持续的转化至关重要.
- 三键裂变所需的高能量通常需要恶劣的反应条件.
- 现有的降解途径通常涉及关联机制,在温和条件下限制效率.
研究的目的:
- 研究表面等离子体共振在温和条件下激活 (N2) 的潜力.
- 探索由等离子效应促进的激活的解离机制.
- 使用现有资源开发有效的氨合成催化系统.
主要方法:
- 使用基于同步射线的现场红外光谱和环境压力X射线光电子光谱来研究激活.
- 采用理论模拟来理解等离子体增强电场,热电子和界面杂交的作用.
- 合成并测试了用于生产氨的AuRu核心天线纳米结构.
主要成果:
- 证明表面等离子能在光下通过水中的解离机制驱动激活.
- 理论计算揭示了等离子增强场,热电子和界面杂交的关键贡献.
- 使用室温和2 atm的AuRu纳米结构,没有牺牲剂,达到101.4μmolg-1h-1的高氨产量.
结论:
- 表面等离子体在温和条件下对等惰性分子具有重要作用.
- 开发的AuRu核心天线纳米结构为高效,可持续的氨合成提供了一个有前途的平台.
- 这项工作为设计各种化学转换的等离子驱动催化系统开辟了新的途径.
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