Electrochemical working electrode engraved with metal nano grating and preparation method of electrochemical working electrode

A technology of metal nanometer and working electrode, which is applied in the field of electrochemistry, can solve the problems of lack of understanding of electrochemical reactions, difficulty in measuring infrared spectra, etc., and achieve the effect of increasing the strength of the field and compensating for strong absorption

Inactive Publication Date: 2018-11-06
FUDAN UNIV
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Problems solved by technology

However, our understanding of electrochemical reactions is mainly based on the traditional volt-ampere characteristic analysis method, but the understanding of electrochemical reactions at the molecular level is still very lacking. Obtaining the intermediate products of the reaction process, the configuration and orient...

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  • Electrochemical working electrode engraved with metal nano grating and preparation method of electrochemical working electrode

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specific Embodiment approach

[0020] In the following, an electrochemical working electrode of a metal nano-grating is prepared by using gold as a raw material and a silicon wafer as a substrate as an example. The specific implementation is as follows:

[0021] (1) Use Comsol software to build a model, given an infrared incident angle of 74 degrees, the model is the air layer, the substrate substrate, the gold film, and water from top to bottom, and the simulation calculation is carried out to obtain the stretching vibration of the specified chemical bond The optimal combination of gold film thickness, slit width, and grating period for near-field enhancement in the infrared band is on the order of hundreds of nanometers and microns, respectively;

[0022] (2) Use acetone, ethanol, and water to ultrasonically clean the substrate in sequence, or soak the substrate in concentrated sulfuric acid for a period of time to clean the substrate silicon wafer;

[0023] (3) Depositing a thin film of gold on the subs...

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Abstract

The invention belongs to the electrochemistry technical field and relates to an electrochemical working electrode engraved with a metal nano grating and a preparation method of the electrochemical working electrode. At present, people's understanding of electrochemical reactions at the molecular level is still very insufficient, they still face a tough challenge in obtaining intermediate products,and the configurations and orientations of chemical bonds in a reaction process. The infrared vibration spectroscopy is the most effective technique to acquire molecular level information in chemicalanalysis, however, infrared light is strongly attenuated in an electrode and an electrolyte, and as a result, it is difficult to measure an infrared spectrum. According to the electrochemical workingelectrode engraved with the metal nano grating provided by the invention, a momentum is compensated by the grating, so that incident infrared light can be coupled into surface plasmons which can be propagated on an interface and have a strong near-field enhancement effect, and therefore, the absorption of the infrared light by the metal electrode and the electrolyte can be offset, field strengthat the electrochemical interface can be enhanced considerably, and thus, the acquisition of a molecular vibrational spectrum in an in-situ and real-time reaction process on the electrochemical interface can be realized.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrochemical working electrode engraved with a metal nano grating and a preparation method thereof. Background technique [0002] Electrochemistry is one of the most important disciplines in modern science and industry, playing a key role in many applications. However, our understanding of electrochemical reactions is mainly based on the traditional volt-ampere characteristic analysis method, but the understanding of electrochemical reactions at the molecular level is still very lacking. Obtaining the intermediate products of the reaction process, the configuration and orientation of chemical bonds is still difficult. is a serious challenge. Infrared vibrational spectroscopy is the most effective technique for obtaining information at the molecular level in chemical analysis, but infrared light is strongly attenuated in electrodes and electrolytes, mak...

Claims

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Application Information

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IPC IPC(8): G02B5/18G02B5/00G01N21/31
CPCG01N21/31G02B5/008G02B5/1857
Inventor 刘韡韬刘志华李莹徐倩
Owner FUDAN UNIV
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