表面增强拉曼光谱在燃料电池与锂电池机理研究中的应用

Surface-Enhanced Raman Spectroscopy Study in the Reaction Process of Fuel Cells and Lithium Battery

电化学能源技术可以在几乎不产生污染物的情况下将化学能高效转化为电能,是人们当今重点发展的能源技术。这项技术的发展非常依赖合适催化剂的开发。然而对电化学中固液界面反应机理的研究却因为反应复杂,中间产物种类多、含量少、寿命短等而困难重重,限制了能源反应催化剂的进一步开发。表面增强拉曼光谱作为一种指纹识别光谱,能够提供具有极高表面检测灵敏度的拉曼散射信号,从而较好地提供电极表界面分子的结构信息。本文主要介绍表面增强拉曼光谱在燃料电池与锂电池反应机理研究上的应用。首先,本文将会介绍表面增强拉曼光谱通过测定燃料电池半反应氧还原、氢氧化反应的中间物种对反应机理进行研究,其次将会介绍表面增强拉曼光谱通过类似的策略研究锂电池电极反应机理及固液界面动态过程,最后将会总结表面增强拉曼光谱目前在电催化反应应用中的不足之处并对未来作出展望。

The need for pollution control and the depletion of non-renewable energy sources have made the development of clean energy an urgent need for society.Electrochemical energy technology can efficiently convert chemical energy into electric energy without producing pollutants,which arouses researchers’interest in recent days.The development of this technology relies heavily on the development of suitable catalysts.However,the study of the reaction mechanism at the solid-liquid interface is difficult due to the complexity of the reactions,the variety of intermediates,their low content and the short duration of their existence,which further limits the development of catalysts.Surface-enhanced Raman spectroscopy,as a molecular fingerprint spectrum,is able to obtain strong and sensitive Raman scattering signals and thus provide good structural information on molecules at the electrode surface interface.This paper focuses on the application of surface-enhanced Raman spectroscopy to the study of the reaction mechanism of fuel cells and lithium batteries.Firstly,this article will introduce the research on the mechanism of enhancing the reaction of intermediate species in fuel cell energy reactions ORR and HOR by surface-enhanced Raman spectroscopy.Secondly,it will introduce the mechanism of electrode reactions and dynamic processes at the solid-liquid interface of lithium batteries through similar strategies using surface-enhanced Raman spectroscopy.Finally,it will summarize the shortcomings of surface-enhanced Raman spectroscopy in the application of electrocatalytic reactions and make future prospects.