在纯 Cu 上的电化学 CO2 减少过程中形成 C-C 键100) 不可能在任何潜在情况下涉及吸附的 CO
John Mark P Martirez1, Emily A Carter1,2
1Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, United States.
Journal of the American Chemical Society
|February 12, 2026
概括
铜电极是电催化CO和CO2减少到C2+碳化合物的关键. 先进的模拟表明,在Cu{100}上形成C-C键可能涉及化CO物种,而不是直接的CO合.
科学领域:
- 表面科学是一门学科.
- 电触媒溶解是一种电触媒.
- 计算化学计算化学
背景情况:
- 铜是唯一一种纯金属,可以从CO/CO2电还原中催化C2+碳化合物形成.
- 在Cu表面,特别是Cu100表面的因子依赖活性影响产品的选择性.
- 之前使用相关波函数方法的研究挑战了CO合路径的DFT发现.
研究的目的:
- 调查在Cu上电化学CO和CO2减少过程中形成C-C键的机制.
- 用先进的计算方法评估直接CO合与化中间体的动力可行性.
- 阐明特定吸附物种在C2+碳化合物合成中的作用.
主要方法:
- 利用嵌入式完整的活性空间二阶扰动理论 (ECASPT2) 进行高精度量子力学建模.
- 模拟的电化学合路径涉及吸附的CO (*CO) 和化的CO (*COH) 物种.
- 在相关的电化学潜力下分析了反应动力学和热力学.
主要成果:
- 两个*CO分子的直接电化学合以形成阴离子二聚体被动力抑制.
- *CO二聚物中间体的质子化不能与*CO降解为*COH相竞争.
- 模拟表明*CO不是Cu100上C-C键形成的主要中间体.
结论:
- 电催化合成C2+碳化合物在Cu(100) 上可能通过化CO中间体 (*COH, *CHxOH,或 *CHx) 进行.
- 直接的*CO合路径在热力学上是不利的,并且在动力学上受到阻碍.
- 这项工作完善了对铜表面CO/CO2电还原的机械学理解.
相关概念视频
Peptide Bonds
83.5K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
83.5K
Metal-Ligand Bonds
24.5K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.5K
Bond Energies and Bond Lengths
31.6K
Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.
31.6K
Types of Chemical Bonds
94.6K
Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
94.6K
What is an Electrochemical Gradient?
128.5K
Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient of an ion across the plasma membrane, which is determined by two factors: its chemical and electrical gradients.
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
128.5K
Valence Bond Theory
50.4K
Overview of Valence Bond Theory
50.4K


