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arXiv 2203.05486physics.chem-phcond-mat.mtrl-sci
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金属氧化物/电解质界面处的双电层

Electric Double Layer at the Metal-Oxide/Electrolyte Interface

Lisanne Knijff, Mei Jia, Chao Zhang

AI总结:

本章综述金属氧化物/电解质界面质子双电层的物理化学,总结实验表征与基于密度泛函理论的原子模拟方法,并展望未来研究。

摘要:

金属氧化物表面同时充当 Brønsted 酸和 Brønsted 碱,这使其能够与电解质溶液交换质子,并根据环境 pH 产生正或负的质子电荷。这些界面质子电荷随后由电解质溶液中的反离子补偿,从而导致双电层(EDL)的形成。由于 EDL 在电化学、地球化学和胶体科学中发挥着关键作用,因此有必要从实验和理论两种途径理解金属氧化物体系中 EDL 的结构-性质关系。本章聚焦金属氧化物/电解质界面处质子双电层的物理化学。具体而言,总结了如何通过电位滴定实验、电化学方法、表面敏感振动光谱以及 X 射线光电子能谱来测定 EDL 电容和双电层电势。随后讨论了 EDL 的原子尺度建模,重点是基于密度泛函理论的分子动力学模拟。文中还给出了该主题未来工作的结论与展望。

英文摘要:

Metal-oxide surfaces act as both Brønsted acids and bases, which allows the exchange of protons with the electrolyte solution and generates either positive or negative proton charges depending on the environmental pH. These interfacial proton charges are then compensated by counter-ions from the electrolyte solution, which leads to the formation of the electric double layer (EDL). Because the EDL plays a crucial role in electrochemistry, geochemistry and colloid science, understanding the structure-property relationship of the EDL in metal-oxide systems from both experimental and theoretical approaches is necessary. This chapter focuses on the physical chemistry of the protonic double layer at the metal-oxide/electrolyte interface. In particular, determinations of the EDL capacitance and the double-layer potential from potentiometric titration experiments, electrochemical methods, surface-sensitive vibrational spectroscopy and X-ray photoelectron spectroscopy are summarized. This is followed by discussions from the atomistic modelling aspect of the EDL, with an emphasis on the density-functional theory-based molecular dynamics simulations. A conclusion and outlook for future works on this topic are also given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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