电极的液下超疏气性质及其对电化学反应动力学影响机制研究

气体析出反应是一类重要的电极反应，是通过电解反应制取氢气、氧气、氯气等资源性气体的基础。采用液下超疏气电极可大大提升气体析出反应的效率。但目前对液下超疏气现象及其影响电极过程的机制缺乏根本认识。为此，本项目拟开展如下研究：制备组成、微观结构不同的系列纳米阵列电极，揭示电极材料组成和微观结构等因素对电极气体润湿性质（接触角、接触角滞后及粘附力）的影响规律，探明其影响机制。将液下超疏气电极用于电化学气体析出反应，通过分析电化学噪声谱数据和高速摄像视频提取析出气泡的尺寸特征和空间分布特征，探明电极润湿性质对气泡脱离过程的影响，揭示气泡脱离步骤对气体析出反应动力学的影响机制，推导液下超疏气电极的气体析出反应的电化学极化方程。以上述结果为指导，构建高效气体析出电极。. 本项目的开展，可深化对电极超疏气性质的认识，还可指导高效气体析出电极的设计、制备。

Gas evolution reactions (GERs), such as generating hydrogen via water splitting and etc, are important electrode processes for electrochemical theoretical investigation and industrial application. The efficiency of GERs can be greatly improved by using under-liquid superaerophobic (ULSOB) electrodes. However, at present it is lack of fundamental insights into the nature of ULSOB phenomena and its mechanism affecting the electrode processes. So this project is proposed as follows: Preparing a series of nanoarrays electrodes with different compositions and microstructures, and investigating the influence mechanism of material composition, microstructure on gas wetting properties (contact angle, contact angle hysteresis, and adhesion force). Analyzing the electrochemical noise spectra and high-speed videos of different ULSOB electrodes for GERs to further extract the characteristics of bubble sizes and spatial distributions. Then the effects of bubble detachment on the wettability as well as on the GER kinetics will be illuminated and the electrochemical polarization equations for the ULSOB electrodes will be deduced. Based on the above results, the efficient gas evolution electrodes will be constructed..This project will provide new and fundamental insights into the nature of the superaerophobicity phenomena, which will also guide the design and preparation of the efficient gas evolution electrodes.