相关实验视频
Updated: Feb 8, 2026

05:57
Blood Flow Imaging with Ultrafast Doppler
Published on: October 14, 2020
8.5K
协调工程突破了单原子的惰性,使得酸激活超快
Yudan Dong1, Yang Wang2, Zhihui Xie3
1State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Chengdu Academy of Environmental Science, Chengdu 610072, China; Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China.
Science bulletin
|February 6, 2026
概括
这项研究开发了一种氧化的单原子催化剂 (MnN2O),可以有效地激活酸 (PAA) 进行污染物降解. 催化剂显著提高了双A在水处理中的去除率,证明了其实际应用潜力.
科学领域:
- 环境化学环境化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 水中的持久有机污染物 (POP) 需要高效和可持续的先进氧化过程.
- 单原子催化剂提供绿色激活酸 (PAA),但它们的性能受到位惰性的限制.
研究的目的:
- 通过调节它们的电子结构来增强单原子催化剂的PAA激活的催化活性.
- 通过使用O-化单原子催化剂,研究PAA激活和单点氧生成的机制.
主要方法:
- 制造具有O兴奋剂的环保和低毒性单原子催化剂.
- 催化剂电子结构和协调环境 (三协调 MnN2O) 的表征.
- 密度函数理论 (DFT) 计算以阐明催化机制.
主要成果:
- 氧化兴奋剂增强了MnN2O中的电子移位和Mn-O共价性,促进了PAA激活到单点氧 (1O2).
- 在双甲 (BPA) 降解动力学上取得了8.8-9.9倍的改善.
- 在连续流系统中,在120小时内,证明了高的BPA去除率 (97.96%在自来水中,95.46%在废水废水中).
结论:
- 在O-doped MnN2O催化剂有效地克服了传统的单原子催化剂的局限性.
- 该研究提供了一种新的策略,通过优化电子分布和协调环境来设计高效的PAA型芬顿式催化剂.
- 开发的催化剂在水资源整治中的实际应用方面显示出显著的前景.
相关概念视频
Coordination Compounds and Nomenclature
26.8K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
26.8K
Lattice Centering and Coordination Number
11.7K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
11.7K
Coordination Number and Geometry
19.1K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.1K
Fixing Double-strand Breaks
14.8K
The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
14.8K
Atomic Structure
210.3K
Overview
210.3K
Atomic Mass
70.4K
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
70.4K

