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In-situ flowing thin-layer spectrum electrochemical reaction tank for sum frequency spectrum

A chemical reaction and reaction cell technology, applied in the direction of material analysis through optical means, scientific instruments, and material analysis through electromagnetic means, can solve the problems of reducing light intensity and the difficulty of detecting electrochemical interfaces with frequency spectrum, and achieves guaranteed The effect of repeatability and stability

Inactive Publication Date: 2012-07-04
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since one of the incident beams of the sum-frequency vibration spectrum is an infrared laser, when it reaches the electrode surface through the electrochemical solution, it is often absorbed by the solution and reduces the light intensity, which brings difficulties to the sum-frequency spectrum to detect the electrochemical interface.
The two beams of incident light in the sum frequency vibration spectrum are incident at an oblique angle. Due to the needs of the experiment, the same device needs to adapt to different laser incident angles. The traditional planar optical window cannot meet this requirement.

Method used

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  • In-situ flowing thin-layer spectrum electrochemical reaction tank for sum frequency spectrum
  • In-situ flowing thin-layer spectrum electrochemical reaction tank for sum frequency spectrum
  • In-situ flowing thin-layer spectrum electrochemical reaction tank for sum frequency spectrum

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Embodiment 1

[0023] Embodiment 1, electrochemical reaction cell

[0024] The structure of the electrochemical reaction cell of the present invention is as Figure 1-Figure 6 As shown in the figure, the marks in the figure are as follows: 1 window fixing frame, 2 calcium fluoride crystal plano-convex lens window, 3 reaction cell body, 4 gold electrode, 5 silver ion electrode, 6 platinum wire electrode, 7 liquid inlet pipe, 8 outlet pipes.

[0025] The electrochemical reaction cell of the present invention comprises reaction cell body 3, and the material of this reaction cell body 3 is polytetrafluoroethylene, and the top of reaction cell body 3 is provided with a window (not shown in the figure), and this window is provided with a Calcium fluoride crystal plano-convex lens window 2 with the convex surface upward, the calcium fluoride crystal plano-convex lens window 2 is tightly connected with the reaction pool body 3 through the window fixing frame 1; the calcium fluoride crystal plano-co...

Embodiment 2

[0027] Embodiment 2, utilize the electrochemical reaction cell of embodiment 1 to detect acetonitrile / gold electrode interface in situ

[0028] The laser used in this example was purchased from EKSPLA Company in Lithuania. The laser repetition frequency is 10Hz, and the picosecond laser system generates 1064nm laser with a pulse width of about 23 picoseconds through passive mode locking, and the energy is about 30mJ / pulse. The 1064nm fundamental frequency light undergoes frequency doubling and sum frequency processes to obtain lasers with frequencies of 532nm and 355nm, of which the 532nm laser is directly used for a beam of visible light in the experiment after polarization control and delay control, while the 355nm laser is passed through based on LBO (LiBO 4 ) crystal OPG (Optical Parameter Generation) / OPA (Optical Parameter Amplification) process and based on AgGaS 2 The crystal DFG (difference frequency) process generates tunable laser from 420nm to 2300nm. This part ...

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Abstract

The invention provides an in-situ flowing thin-layer electrochemical reaction tank for a sum frequency generation vibrational spectroscopy. The electrochemical reaction tank comprises a reaction tank body provided with a working electrode, a reference electrode and a counter electrode; the top of the reaction tank body is provided with a window; and the window is provided with a plano-convex lens with an upward convex side. The electrochemical reaction tank overcomes the problem about light absorption in a process that an electrochemical interface is researched by the sum frequency generation vibrational spectroscopy, and guarantees experimental repeatability and stability. The electrochemical reaction tank is also suitable for detecting other liquid / solid interfaces by optical means.

Description

technical field [0001] The invention relates to a spectroelectrochemical reaction cell, in particular to an in-situ flow thin-layer spectroelectrochemical reaction cell for a sum frequency vibration spectrum detection method. Background technique [0002] Sum-frequency vibration spectroscopy is a nonlinear optical detection method. A beam of wavelength-tunable infrared laser and a beam of fixed-wavelength visible laser are simultaneously incident on the surface of the sample at the same point, and a beam of frequency equal to the two incident laser beams is generated in the reflection direction. The sum-frequency signal light of the sum of frequencies scans the infrared laser. When the infrared laser frequency resonates with the vibration transition of the sample molecular group, the sum-frequency signal light is enhanced to obtain the sum-frequency vibration spectrum. Since the sum-frequency signal is a second-order nonlinear optical response, it can only be generated when ...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/63G01N27/416
Inventor 黄芝赵明唐鑫周恩财王鸿飞郭源
Owner INST OF CHEM CHINESE ACAD OF SCI