基于的二原子催化剂用于电化学降低CO2到乙烯:一项第一原则研究
Ning Wang1,2,3, Jialu Li1, Siyu Gan1
1School of Science, Key Laboratory of High Performance Scientific Computation, Xihua University, Chengdu 610039, China.
Langmuir : the ACS journal of surfaces and colloids
|July 22, 2025
概括
像Sn/Cu-NG和Pd/Cu-NG这样的二原子催化剂有效地将二氧化碳电降解为多碳产品. 通过*HCCO路径,Pd/Cu-NG显示出更高的选择性和更低的能量障碍,用于通过*HCCO路径生产乙烯.
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:
- 有效的二氧化碳 (CO2RR) 到多碳 (C2+) 产品的电降解需要最佳的CO吸附和C-C合.
- 二原子催化剂在双活性位点提供了对中间吸附的精确控制,降低了C-C合的过度潜力.
研究的目的:
- 研究二氧化碳在M/Cu-nanographene (M = Zn, Pd, Sn, Ag, Au) 催化剂上的电降解的机制和活性.
- 确定对C2+产品具有高选择性的催化剂,并分析它们的反应途径.
主要方法:
- 使用第一原则计算,研究各种M/Cu-NG催化剂的CO2RR.
- 分析包括形成能量,动态,溶解潜力,选择性 (HER与CO2RR),吸附,电荷转移和能量障碍.
主要成果:
- Sn/Cu-NG和Pd/Cu-NG证明了CO2RR选择性,通过*COOH中间体进行.
- Sn/Cu-NG 支持*CO 和 *CHO 之间的 C-C 合,其 PDS ΔG 为 0.96 eV,屏障为 1.23 eV.
- Pd/Cu-NG通过*HCCO路线有利于乙烯生产,其较小的PDS ΔG为0.71 eV,屏障为0.61 eV.
结论:
- 由于更有利的C-C合路径和更低的能量障碍,Pd/Cu-NG在乙烯生产中表现出优越的性能.
- 这项研究突出了二氧化碳催化剂在高效的二氧化碳电降解中对有价值的多碳产品的潜力.
更多相关视频
相关概念视频
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K
01:27Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview
1.8K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.8K
02:23Alcohols from Carbonyl Compounds: Reduction
10.8K
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
10.8K
02:50Catalysis
27.6K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.6K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.6K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.6K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.2K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.2K