相关实验视频

Updated: May 12, 2025

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method

Published on: May 21, 2018

协同作用的Cu₂O@Ni(OH)₂核心外电催化剂,用于高效的酸盐降解氨

Zunjie Zhang¹, Bingcheng Ge², Mengran Liu²

¹School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.

ACS applied materials & interfaces

|April 23, 2025

概括

这项研究引入了一种新的基于铜的催化剂,Cu2O@Ni(OH) 2,用于高效的电催化酸盐降解为氨. 催化剂通过结合铜来增强氨产量.

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:

将酸盐减少为氨 (NO3RR) 为污染物修复和氨合成提供了一个可持续的途径.
基于铜的催化剂在NO3RR中表现出色,因为它具有强大的酸盐中间结合,但其水分离能力较差.
低效的H•生成限制了酸盐中间体的化,阻碍了整体NO3RR性能.

研究的目的:

设计和合成一个新的外核心纳米立方体电催化剂,Cu2O@Ni(OH) 2,用于增强电催化酸盐的减少.
为了研究铜氧化物和氧化物之间的协同作用,以提高NO3RR性能.
阐明增强水解离和酸盐化的机制.

主要方法:

通过液相减少,蚀刻和沉合成Cu2O@Ni(OH) 2外核心纳米立方体.
电化学表征包括循环电压测量和时测量.
运行拉曼和奥格尔电子光谱,研究NO3RR期间的催化剂转换.
密度函数理论 (DFT) 计算和电子磁共振 (EPR) 分析以了解反应机制.

主要成果:

2O@Ni(OH) 2-3.3%显示出557.9 μmol h−1 cm−2的高氨产率和97.4%的法拉第效率,在 -0.35 V和RHE.
操作式光谱学证实了NO3RR期间Cu2O的降解为Cu.
DFT和EPR的研究表明,Ni(OH) 2有助于H2O解离,降低激活能量屏障并促进H•生成.

结论:

2O和Ni(OH) 2之间的协同效应显著增强了电催化酸盐降解到氨的过程.
开发的Cu2O@Ni(OH) 2催化剂在可持续生产氨方面表现出卓越的性能.
这项工作通过解决水解离的局限性,为NO3RR设计高效的电催化剂提供了洞察力.

关键词:

在H2O分离过程中.激活能量屏障的激活能量屏障电化学还原电化学还原酸盐酸盐的使用方法质子供应提供了质子供应.

更多相关视频

Diagonal Method to Measure Synergy Among Any Number of Drugs

Diagonal Method to Measure Synergy Among Any Number of Drugs

Published on: June 21, 2018

Potentiation of Anticancer Antibody Efficacy by Antineoplastic Drugs: Detection of Antibody-drug Synergism Using the Combination Index Equation

Potentiation of Anticancer Antibody Efficacy by Antineoplastic Drugs: Detection of Antibody-drug Synergism Using the Combination Index Equation

Published on: January 19, 2019

相关概念视频

Combined Effects of Drugs: Synergism

Combined Effects of Drugs: Synergism

Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

Complexation Equilibria: The Chelate Effect

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...

Cofactors and Coenzymes

Cofactors and Coenzymes

Enzymes require additional components for proper function. There are two such classes of molecules: cofactors and coenzymes. Cofactors are metallic ions and coenzymes are non-protein organic molecules. Both of these types of helper molecule can be tightly bound to the enzyme or bound only when the substrate binds.

Formation of Complex Ions

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

Metal-Ligand Bonds

Metal-Ligand Bonds

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...