电压依赖的电化学二氧化碳减排机制由动力蒙特卡洛模拟揭示
Shuaichong Wei1, Yuhong Luo1, Huijie Zhang1
1Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
The journal of physical chemistry letters
|March 11, 2025
概括
一个新的动力蒙特卡洛模型阐明了铜催化剂上的电催化二氧化碳还原反应 (CO2RR). 它揭示了在Cu (111) 和Cu (100) 表面上的C1和C2产品的电压依赖产品分布和速率决定步骤.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 计算化学计算化学
背景情况:
- 在铜催化剂上的电催化二氧化碳减排 (CO2RR) 的电压依赖的动态仍然不太清楚.
- 了解这些动态对于开发高效的二氧化碳转化技术至关重要.
研究的目的:
- 开发一种动力蒙特卡罗 (KMC) 模型,用于模拟Cu (111) 和Cu (100) 表面上的CO2RR.
- 阐明反应途径和产品选择性的电压依赖演变.
- 为了确定不同产品的速率决定步骤 (RDS).
主要方法:
- 开发一种KMC模型,结合密度函数理论 (DFT) 来计算178个基本反应的能量.
- 模拟CO2RR线性扫描电压测量和潜在依赖产品分布.
- 应用速率控制程度分析的应用.
主要成果:
- KMC模型准确地预测了Cu催化剂上CO2RR的实验观测.
- 在Cu (111),甲 (CH4) 是主要的C1产物,随着潜在的增加,RDS从CO化转向COH*形成.
- (100) 支持乙烯 (C2H4) 和乙醇 (CH3CH2OH) 等C2产品,而CO*合则是RDS.
结论:
- 开发的KMC模型为铜表面的CO2RR复杂动态提供了重要的见解.
- 这项研究突出了Cu (111) 和Cu (100) 表面的独特催化行为.
- 这项工作有助于合理设计用于选择性二氧化碳转换的基于铜的电催化剂.
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