在酸工程的性葡萄糖酸中,旋转极化电子转移 (spin-polarized electron transfer) 解锁了尿素电氧化对的NiOOH激活
Ming Chen1, Wen-Da Zhang1, Qingna Gong1
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China. wenda.zhang94@gmail.com.
概括
奇拉酸酸改性氧化物表现出奇拉诱导的旋转选择性效应,增强了尿素氧化过程中的电子转移. 这种修改显示出电化学反应的巨大潜力.
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
- 奇拉性是一种精神性.
背景情况:
- 氧化 (Ni(OH) 2) 是电化学应用中的一个关键材料.
- 奇拉诱导的自旋选择性 (CISS) 效应为控制电子转移提供了新的途径.
- 用奇拉分子修改Ni(OH) 2可能会增强其催化性能.
研究的目的:
- 调查酸 (TA) 修改对Ni (OH) 的影响2.
- 为了探索应用性诱导的自旋选择性 (CISS) 效应在Ni(OH) 2的电化学反应.
- 为了评估D-TA-Ni(OH) 2在尿素氧化中的性能.
主要方法:
- 合成酸 (TA) 修饰的酸2.
- 材料结构和性能的表征.
- 电化学测试,包括循环电压测量和时测量,以评估尿素氧化活性.
主要成果:
- 基拉尔TA的修饰诱导了Ni(OH) 2中的CISS效应,产生了自旋选择性电子转移通道.
- D-TA-Ni(OH) 2催化剂在1.38V时实现了100mA cm-2的高电流密度.
- 催化剂呈现出极好的21.88 mV dec-1的塔菲尔斜率,表明有效的尿素氧化动力学.
结论:
- 的基拉尔修饰2有效地利用CISS效应来增强电子转移.
- D-TA-Ni(OH) 2在尿素氧化反应中表现出卓越的性能.
- 这项研究突出了一个有前途的策略,用于设计使用奇拉诱导旋转选择性的先进电催化剂.
相关概念视频
Chirality at Nitrogen, Phosphorus, and Sulfur
5.6K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.6K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.2K
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...
3.2K
Crystal Field Theory - Tetrahedral and Square Planar Complexes
40.9K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
40.9K
Sharpless Epoxidation
3.7K
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
3.7K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.3K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.3K
Prochirality
3.7K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.7K

![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)
