A thin-layer spectroelectrochemical detection device with a sandwich structure

A spectroelectrochemical and detection device technology, which is applied in the field of in-situ electrochemistry and spectral analysis, can solve the problems of limiting the rapid reuse of detection devices, the limitation of spectroelectrochemical universality, and the inapplicability of samples with high viscosity. Good thin-layer voltammetric electrochemical characteristics, easy calibration of optical path, and elimination of the effect of solution diffusion

Active Publication Date: 2019-11-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under complex electrochemical reaction conditions, reaction products or intermediate products will be adsorbed on the surface of the working electrode, causing contamination of the electrode, and in some existing spectroelectrochemical detection device designs (see the thin-layer spectroelectrochemical spectroelectrochemical product produced by the British Specac company) detection device), the electrodes, especially the working electrodes, are fixed and cannot be replaced, so the electrodes cannot be cleaned and reused, resulting in huge waste
[0005] (2) Sample injection problem
In some existing designs, the sample needs to be injected into the liquid storage pool or the electrode pool first, and then enter the detection device from the liquid storage pool or the electrode pool. This sampling method requires a large amount of sample and is not applicable. For samples with high viscosity (eg: ionic liquid)
[0006] (3) Air tightness problem
[0007] (4) Structural problems
The spectroelectrochemical detection device must be cleaned after each measurement. Due to the complex structure of some detection devices, the disassembly and assembly process is cumbersome, especially the electrode position must be corrected during the assembly process, which limits the rapid repetition of the detection device. use
[0008] (5) Universal issues
The special design of the detection device will limit its matching with ordinary commercial spectroscopic instruments, and it needs to rely on a special sample holder for optical path calibration, which limits the universality of spectroelectrochemistry

Method used

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  • A thin-layer spectroelectrochemical detection device with a sandwich structure
  • A thin-layer spectroelectrochemical detection device with a sandwich structure
  • A thin-layer spectroelectrochemical detection device with a sandwich structure

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Embodiment 1

[0059] The working electrode 13, the reference electrode 15, and the auxiliary electrode 16 of this embodiment respectively adopt a platinum mesh working electrode, a platinum mesh auxiliary electrode, and a platinum wire reference electrode, and the rest are the same as Figure 1-4 . When in use, prepare 0.1mol / L lithium perchlorate acetonitrile solution as electrolyte, add 0.9mg ferrocene (about 1mmol / L) to 5mL electrolyte, take 0.2mL solution with a syringe, and adopt the method of pressure sampling Inject the thin layer 14 from the injection hole, cover the inlet and outlet sample hole 7 tightly, take three wires and connect the thin-layer spectroelectrochemical detection device with a sandwich structure and the electrochemical workstation (the model is CHI660E, and the electrochemical workstation can provide molecules on the electrode interface. The electron transfer information of the electro-redox and the solution diffusion migration information) are connected, and the ...

Embodiment 2

[0061] The working electrode 13, the reference electrode 15, and the auxiliary electrode 16 of this embodiment respectively adopt a platinum mesh working electrode, a platinum mesh auxiliary electrode, and a platinum wire reference electrode, and the rest are the same as Figure 1-4 . To use, use a syringe to take 0.2 mL of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([bmim]CF 3 SO 3 ) ionic liquid, inject the thin layer from the injection hole by pressure sampling, cover the inlet and outlet sample hole 7 tightly, insert the thin layer spectroelectrochemical detection device with a sandwich structure into the Fourier transform infrared spectrometer to scan the infrared spectrum background channel , click the sample channel to scan after the background scan, that is, get Figure 6 The curve a in [bmim]CF 3 SO 3 As the infrared spectrum of the background, the spectrum is relatively stable, indicating that the detection device has the characteristics of low noise i...

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Abstract

The invention discloses a thin-layer spectrum electrochemical detection device with a sandwich structure. According to the detection device, a rubber isolation pad, an upper-layer perspective window, a polymer gasket and a lower-layer perspective window are arranged between an upper-layer metal panel and a lower-layer metal panel in sequence; the polymer gasket is arranged between the upper-layer perspective window and the lower-layer perspective window to form a multilayered structure similar with a sandwich; a thin layer is internally provided with a working electrode, a reference electrode and an auxiliary electrode to form an electrochemical reaction tank of the three electrodes; a protective sleeve is arranged at the periphery of the lower-layer perspective window; a through hole is formed in the middle of the protective sleeve; the through holes can be used for just storing the lower-layer perspective window and the polymer gasket; electrode connecting inserting holes are formed in the outer side of the protective sleeve. The thin-layer spectrum electrochemical detection device with the sandwich structure has good air tightness; the thickness of the thin layer can be adjusted according to the polymer gasket so that excellent thin-layer electrochemical reaction characteristics are provided; the aim of in-situ spectrum detection of an electrochemical reaction product and an intermediate product can be realized.

Description

technical field [0001] The invention relates to the fields of in-situ electrochemical and spectral analysis, in particular to a thin-layer spectroelectrochemical detection device with a sandwich structure for in-situ analysis. Background technique [0002] Spectroelectrochemistry combines electrochemical and spectroscopic techniques, providing a new method for studying and accurately determining electrochemical reaction products and intermediate products. Through voltage control, the electrochemical reaction can be carried out smoothly in the spectroelectrochemical detection device, and the spectral information of these substances can be obtained at the same time, and then the kinetics and thermodynamic parameters of the electrochemical reaction can be obtained. important means of the mechanism. The key to spectroelectrochemical research lies in the spectroelectrochemical detection device. [0003] At present, the reported spectroelectrochemical detection devices are all b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N21/33G01N21/3577G01N21/3581G01N21/359G01N21/75G01N21/03
CPCG01N21/03G01N21/25G01N21/3577G01N21/75G01N2021/0328
Inventor 李雪辉杨寒玲曾强龙金星江莉龙
Owner SOUTH CHINA UNIV OF TECH
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