在分子催化剂中通过协调环境监管调节的电子结构,以实现高效的异质缩
Libo Sun1,2, Chencheng Dai2,3, Tianjiao Wang2
1Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong SAR, P. R. China.
Angewandte Chemie (International ed. in English)
|February 6, 2024
概括
新的宏环分子催化剂通过电催化酸盐还原反应 (eNO3RR) 有效地产生氨 (NH3). 一个特定的N2 (pyrrole) -N2 (pyridine) 配置实现了超过90%的NH3法拉代克效率,提供了可持续的能源解决方案.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 氨 (NH3) 对工业和潜在的无碳能源载体至关重要.
- 电催化降解反应 (eNO3RR) 为NH3合成和酸盐去除提供了一条途径.
- 需要高效的电催化剂来推进eNO3RR技术.
研究的目的:
- 合成和评估异质eNO3RR的宏环分子催化剂.
- 研究不同协调环境如何影响催化剂活动和电子结构.
- 为eNO3RR催化剂建立结构-活性关系.
主要方法:
- 一系列具有多种协调环境的宏环分子催化剂的合成.
- 通过eNO3RR对NH3生产的催化剂进行电催化试验.
- 分析催化剂性能,包括法拉第克效率,生产率和周转频率.
- 对磁性质的研究和理论计算 (d波段中心变化).
主要成果:
- 具有N2 (pyrrole) -N2 (pyridine) 金属中心配置的催化剂显示出优异的eNO3RR活性.
- 达到了超过90%的NH3法拉代克效率,最高约为94%.
- 证明了高的生产率 (11.28 mg cat-1 h-1) 和周转频率 (3.28 s-1).
- 多种协调环境与不同的磁矩和电子结构相关.
结论:
- 具有可调节协调环境的宏循环分子催化剂对eNO3RR有效.
- 这种N2 (pyrrole) -N2 (pyridine) 配置是高性能NH3生产的最佳选择.
- 电子结构,特别是d频段中心,影响催化活动,并与计算参数相关.
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