超原子银纳米集群中的一个Ni-结合化物:探测对氧进化反应活性的协同异原子核效应
Yu-Rong Ni1, Tzu-Hao Chiu1, Rugma T P1
1Department of Chemistry, National Dong Hwa University, No. 1, Sec 2, Da Hsueh Rd., Hualien, 97401, Taiwan.
Small (Weinheim an der Bergstrasse, Germany)
|November 11, 2025
概括
这项研究引入了用于增强氧进化反应 (OER) 催化的新-银双金属纳米集群 (Ni-Ag NCs). 这些Ni-AgNCs在性条件下表现出较好的催化活性,与仅含银的对应物相比.
科学领域:
- 无机化学 无机化学
- 纳米材料科学 科学 纳米材料科学
- 催化剂是一种催化剂.
背景情况:
- 硬币纳米集群 (NCs) 的异金属兴奋剂是一种不断增长的研究领域.
- 由于成本效益,第一排过渡金属越来越多地被用于兴奋剂.
- -银 (Ni-Ag) 双金属NC为先进的催化应用提供了潜力.
研究的目的:
- 为了合成和描述新的Ni-Ag双金属纳米集群.
- 研究合成的NCs的结构性质和电子配置.
- 评估Ni-AgNCs在氧化演化反应 (OER) 中的催化性能.
主要方法:
- 合成Ni-Ag双金属NCs的一缩减方法.
- 单晶X射线衍射 (SCXRD) 用于结构确认.
- 密度函数理论 (DFT) 计算用于理论支持.
- 电化学测试以评估OER催化活性.
主要成果:
- 成功合成了Ni-Ag双金属NCs:[NiAg20{S2P(Oirp) 2}12]和[NiHA20{S2P(Oirp) 2}12].
- 发现NiHAg19作为第一个具有封装NiH单元和Ni(0) ─H结合的NC.
- 这两个NC都表现出超原子的8电子计数 (1S21P6配置).
- 与单金属银NC相比,Ni-AgNC显示显著增强的性OER活性.
结论:
- 兴奋剂有效地提高了银纳米集群的OER催化性能.
- 合成的Ni-AgNCs为高效的电催化提供了一个有希望的替代方案.
- NiHAg19中独特的NiH单元为研究NC中的金属化物相互作用开辟了新的途径.
相关概念视频
02:32Bonding in Metals
51.7K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
51.7K
01:08Covalent Bonds
9.8K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
9.8K
01:29Covalent Bonds
158.2K
Overview
158.2K
00:54Radical Formation: Homolysis
4.2K
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
4.2K
02:46Covalent Bonding and Lewis Structures
60.3K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
60.3K
00:26Hydrogen Bonds
129.7K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
129.7K