通过Co(II) 复合体进行质介导的进化,并通过计算研究对该机制进行评估
Manaswini Raj1, Koushik Makhal2, Aman Mishra1
1Artificial Photosynthesis Laboratory, Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India.
两种新的复合物有效地催化了对燃料的质子还原. 替代复合物 (Co-NO) 比替代复合物 (Co-Cl) 具有更高的活性和稳定性,具有有利的反应能量.
科学领域:
- 协调化学 协调化学
- 电触媒溶解是一种电触媒.
- 绿色化学 绿色化学
背景情况:
- 开发高效的电催化剂,以减少质子变成,对于可持续能源技术至关重要.
- 带有氧化还原活性联体的双核复合物为催化应用提供了有前途的平台.
- 西米达衍生联体可以功能化调整金属复合物的电子和硬质性质.
研究的目的:
- 合成和表征两种新的双核复合物,Co-Cl和Co-NO,其中包括来自的配体.
- 为了研究它们的催化活性和稳定性,以电催化减小质子到.
- 阐明机械路径,并比较两个复合体的性能.
主要方法:
- 二核复合物的合成和表征.
- 电化学研究包括在DMF/H2O中使用乙酸作为质子源的循环电压测量和时测量.
- 气相色谱用于法拉第克效率的确定.
- 计算研究 (DFT) 用于确定反应能量和评估催化效率.
主要成果:
- Co-Cl 和 Co-NO 复合体都表现出高的催化活性来减少质子,产生 -1.9 V 的 H2 与 SCE 相比,具有 85-89% 的法拉达效率.
- 与Co-Cl (-85.1 kcal mol-1) 相比,Co-NO复合体表现出优越的催化活性和更有利的反应能量 (-88.9 kcal mol-1).
- 这两种复合物在催化条件下都表现出高稳定性,提出了EECC (电化学-化学-化学-化学-电化学) 机制.
结论:
- 合成的双核复合体是有效的分子电催化剂,用于减少质子.
- 替代的Co-NO复合物比替代的Co-Cl复合物更有效地形成气.
- 这些发现有助于设计用于可持续生产的先进电催化剂.
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