相关实验视频

Updated: Dec 23, 2025

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

在Au的接口上重新探讨原子结构) 电极-硫酸溶液

Yuan Fang¹, Song-Yuan Ding¹, Meng Zhang¹

¹State Key Laboratory of Physical Chemistry of Solid Surfaces (PCOSS), Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

Journal of the American Chemical Society

|April 28, 2020

概括

研究人员使用先进的显微镜和光谱仪确定了经典电极/电解质接口的精确原子结构. 这揭示了硫酸盐离子和两个水分子形成结网络,推进电化学理解.

科学领域:

表面科学
电化学
材料科学

背景情况:

了解固体/液体接口的原子结构对于接口过程至关重要.
硫酸中的Au(111) 电极表现出经典的 (√3 × √7) 结构,但其原子细节仍然未解决.
已经提出了10多种吸附配置,突显了这个问题的复杂性和长期性质.

研究的目的:

为了明确确定硫酸中Au{11}{√3}×√7的原子结构.
阐明水分子和键在界面结构中的作用.
了解静电电位如何影响电极/电解质接口的结构转换.

主要方法:

高分辨率的电化学扫描道显微镜 (EC-STM).
电化学红外和拉曼光谱.
一种新的定量计算方法来模拟电化学光谱.

主要成果:

附加结构被确定为Au(111)(√3 × √7)-(SO4··w2),每单元细胞有一个硫酸盐离子 (SO4*) 和两个结构化水分子 (w2*).
发现了包括硫酸盐和水 ([w··SO4··w]和[w··w]) 在内的对称的交叉结网络.
电静电能被证明可以决定质子的亲和力,驱动着电位调节的结构变化.

结论:

这项研究为关键的电化学接口结构提供了明确的原子洞察力.
这些发现澄清了内赫尔姆霍尔茨平面和结在界面过程中的作用.
这项工作促进了对固体/液体界面的电化学和表面科学的基本理解.

更多相关视频

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

相关概念视频

Sulfur Assimilation

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...