通过轨道工程调整单原子催化剂的产品选择性,以减少CO2超出CO的形成
Vasanthapandiyan Mari1, Naiwrit Karmodak1
1Department of Chemistry, Shiv Nadar Institution of Eminence, Greater Noida, 201314, India. naiwrit.karmodak@snu.edu.in.
Nanoscale
|August 27, 2024
概括
带有轴联体的轨道工程增强了用于电化学二氧化碳减排的单原子催化剂. 这一战略提高了甲醇生产的选择性,为可持续能源提供了一个有前途的途径.
科学领域:
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 电化学二氧化碳减排 (CO2R) 对于可持续能源至关重要.
- 单原子催化剂 (SAC) 对CO2R有希望,但由于CO中介结合较弱,在CO形成之外的选择性方面存在困难.
- 轨道工程提供了一种调整催化剂性能的策略.
研究的目的:
- 通过轨道工程来提高CO2R产品的选择性.
- 为了研究轴联体对CO中间体结合和催化剂稳定性的影响.
- 评估甲醇生产的催化活性和选择性.
主要方法:
- 密度函数理论 (DFT) 计算和碎片分子轨道 (FMO) 方法.
- 分析基于宏循环的分子催化剂 (氨酸,氨酸) 和扩展的SAC (石墨烯,COF) 用Fe,Co,Ni补充剂.
- 初始分子动力学 (AIMD) 模拟和大规范潜能方法用于稳定性和反应自由能量计算.
主要成果:
- 中性轴联体 (imidazole,pyridine) 增强了CO中间体的结合亲和力.
- 含有伊米达和皮里丁连接体的添加的SAC显示出对甲醇形成的选择性得到改善.
- 催化活性与轴联体的sigma捐赠能力相关,其性能与Cu相当 (211).
结论:
- 通过轴联体引入的轨道工程是调整CO2R选择性的有效策略.
- 含有特定连接体的添加SAC显示了高效甲醇生产的潜力.
- 这些发现为设计可持续能源应用的先进催化剂提供了洞察力.
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