CN-122016960-A - Flow field control coupling surface enhanced infrared spectrum electrochemical equipment

CN122016960ACN 122016960 ACN122016960 ACN 122016960ACN-122016960-A

Abstract

The application discloses a flow field control coupling surface enhanced infrared spectrum electrochemical device, which comprises a working electrode side end plate, a working electrode, a reference electrode, a first multichannel thin-layer flow channel, an ion exchange membrane, a second multichannel thin-layer flow channel, a counter electrode, a sealing gasket and a counter electrode side end plate which are sequentially arranged, wherein an infrared detection window is arranged on the working electrode end plate, the working electrode is attached to the infrared detection window, a working electrode side fluid inlet is arranged on the working electrode side end plate, the working electrode side fluid inlet is connected with a peristaltic pump, the counter electrode side fluid inlet is arranged on the counter electrode side end plate, and the infrared spectrum detection assembly comprises an incident light path structure and a detection light path structure which respectively make incident light to the infrared detection window and receive infrared detection light. The device provided by the application can simulate various different reaction situations in the real electrochemical cell more abundantly, and provides support for researching factors affecting the reaction of the electrochemical cell more effectively.

Inventors

JIANG XIUE
WANG HONGDA
LIU QIXIN

Assignees

中国科学院长春应用化学研究所

Dates

Publication Date: 20260512
Application Date: 20260226

Claims (10)

1. The surface enhanced infrared spectrum electrochemical device with flow field control coupling is characterized by comprising an electrochemical cell component and an infrared spectrum detection component; the electrochemical cell assembly comprises a working electrode side end plate, a working electrode, a reference electrode, a first multichannel thin-layer flow channel, an ion exchange membrane, a second multichannel thin-layer flow channel, a counter electrode and a counter electrode side end plate which are sequentially arranged, wherein an infrared detection window is formed in the working electrode end plate; The infrared spectrum detection assembly comprises an incident light path structure for transmitting incident first infrared detection light to the infrared detection window and a detection light path structure for detecting second infrared detection light output by the infrared detection window.
2. The flow field control coupled surface enhanced infrared spectroscopy electrochemical device of claim 1, wherein the first multi-channel thin layer flow channel and the second multi-channel thin layer flow channel are polytetrafluoroethylene flow channels; the counter electrode is a platinum sheet electrode, a gold sheet electrode, a nickel sheet electrode or a copper sheet electrode with meshes or cells, the edge of the counter electrode is provided with a sealing gasket, the sealing gasket is a polytetrafluoroethylene sheet or a polysiloxane sheet, and the thickness of the sealing gasket is 0.1mm-1mm.
3. The flow field control coupled surface enhanced infrared spectroscopy electrochemical apparatus of claim 2, wherein said infrared detection window comprises an infrared detection through hole formed in said working electrode side end plate, and an infrared light transmitting crystal embedded in said infrared detection through hole; The working electrode is a gold nano film or a silver nano film plated on the first end face of the infrared light-transmitting crystal, and the thickness of the working electrode is 50nm-200nm.
4. The flow field control coupled surface enhanced infrared spectroscopy electrochemical device of claim 3, wherein the infrared detection via is a circular via, the infrared transparent crystal is a silicon crystal, a zinc selenide crystal, or a germanium crystal; The second end of the infrared light-transmitting crystal comprises a middle end face perpendicular to the central axis of the infrared light-transmitting crystal, and an incident end face and an emergent end face which are symmetrically positioned at two sides of the middle end face and are obliquely arranged relative to the middle end face; Or, the infrared light-transmitting crystal is a hemispherical crystal.
5. The flow field control coupled surface enhanced infrared spectrum electrochemical device of claim 1, wherein the infrared spectrum detection assembly comprises a package housing, a through hole is formed in a side wall of the package housing, and the second end of the infrared light transmitting crystal is embedded in the through hole.
6. A flow field controlled coupled surface enhanced infrared spectroscopy electrochemical apparatus as claimed in any one of claims 1 to 5 wherein the incident light path structure is adjustable in angle of incidence of the first infrared detection light into the infrared detection window.
7. The flow field control coupled surface enhanced infrared spectroscopy electrochemical apparatus of claim 6, wherein said infrared spectroscopy detection assembly comprises a slide rail, said incident light path structure comprises an infrared light source and a first transmission light path structure, said detection light path structure comprises a second transmission light path structure and an infrared spectrometer; The optical elements of the first transmission optical path structure and the second transmission optical path structure are the same and are of opposite optical path structures, and at least part of optical path structures in the first transmission optical path structure and the second transmission optical path structure are arranged on the sliding rail.
8. The flow field controlled coupled surface enhanced infrared spectroscopy electrochemical apparatus of claim 6, wherein the first transmission optical path assembly comprises a first collimating optical element, a first sliding reflective element, and a first concentrating element disposed in sequence along an optical path, and the second transmission optical path assembly comprises a second concentrating element, a second sliding reflective element, and a second collimating optical element disposed in sequence along an optical path; The infrared detection window is positioned on the focuses of the first light focusing element and the second light focusing element; The first sliding reflection element and the second sliding reflection element can synchronously slide along the set direction on the sliding rail; The first infrared detection light output by the infrared light source is modulated into parallel light through the first collimating optical element in sequence, and is incident to the first sliding reflection element along the set direction, reflected by the first sliding reflection element and incident to the first light gathering element, and converged by the first light gathering element and incident to the infrared detection window; the second infrared detection light output by the infrared detection window is modulated into parallel light through the second light converging element and is incident to the second sliding reflecting element, reflected by the second sliding reflecting element and is incident to the second collimating optical element along the set direction, and is modulated into divergent light beams through the second collimating optical element and is incident to the infrared spectrometer.
9. The flow field control coupled surface enhanced infrared spectrum electrochemical device of claim 8, wherein the first sliding reflecting element and the second sliding reflecting element are plane reflecting mirror surfaces formed by two adjacent prism surfaces on the same prism, and the included angles between the two plane reflecting mirror surfaces and the set direction are the same; The sliding rail is provided with an adjusting knob connected with the triangular prism, and the adjusting knob is used for adjusting the position of the triangular prism on the sliding rail.
10. The electrochemical cell reactive infrared detection apparatus of claim 8, wherein the first collimating optical element and the second collimating optical element are concave mirrors formed by two parabolic curved surfaces on the same prism element.

Description

Flow field control coupling surface enhanced infrared spectrum electrochemical equipment Technical Field The invention relates to the technical field of electrochemistry, in particular to a flow field control coupling surface enhanced infrared spectrum electrochemistry device. Background Attenuated total reflection-surface enhanced infrared spectroscopy electrochemical technology is a core characterization technology of spectroscopy and electrochemical cross fusion. The technology can capture molecular structure evolution, charge transfer process and reaction intermediate product information of an electrode surface interface in an electrochemical cell in real time, is a key means for revealing an electro-catalytic mechanism and optimizing electrode materials, and is widely applied to the fields of energy storage and conversion, electrochemical synthesis, environmental management and the like. The device for realizing the surface enhanced infrared spectrum electrochemical technology mainly comprises two core modules, namely a reflection light path device and an electrochemical cell, wherein the reflection light path device is used for transmitting infrared light, reflecting and collecting signals, the electrochemical cell is used for providing a stable electrochemical reaction environment and bearing an electrode system, the electrode system is mainly of a three-electrode structure consisting of a counter electrode, a reference electrode, a working electrode and the like, the electrode system is equivalent to the electrochemical cell which forms a simplified version, and although the structural composition of the electrochemical cell module can be reduced to a certain extent, the electrochemical cell can simulate the actual internal reaction condition of the electrochemical cell very limited, the working performance of the device is limited, and the analysis and research on the internal reaction of the electrochemical cell by utilizing the surface enhanced infrared spectrum electrochemical technology are restricted. Disclosure of Invention The invention aims to provide a flow field control coupling surface enhanced infrared spectrum electrochemical device, solves the problem of limited electrochemical reaction analysis and research, and can simulate various different reaction situations in a real electrochemical cell, thereby more effectively researching factors influencing the reaction of the electrochemical cell and providing more reliable data basis for the real regulation and control of the electrochemical cell. In order to solve the technical problems, the invention provides a flow field control coupling surface enhanced infrared spectrum electrochemical device, which comprises an electrochemical cell component and an infrared spectrum detection component; the electrochemical cell assembly comprises a working electrode side end plate, a working electrode, a reference electrode, a first multichannel thin-layer flow channel, an ion exchange membrane, a second multichannel thin-layer flow channel, a counter electrode and a counter electrode side end plate which are sequentially arranged, wherein an infrared detection window is formed in the working electrode end plate; The infrared spectrum detection assembly comprises an incident light path structure for transmitting incident first infrared detection light to the infrared detection window and a detection light path structure for detecting second infrared detection light output by the infrared detection window. In an alternative embodiment of the present application, the first multi-channel thin layer flow channel and the second multi-channel thin layer flow channel are both polytetrafluoroethylene flow channels; The ion exchange membrane is a perfluorinated sulfonic acid type proton exchange membrane; the counter electrode is a platinum sheet electrode, a gold sheet electrode, a nickel sheet electrode or a copper sheet electrode with meshes or cells, the edge of the counter electrode is provided with a sealing gasket, the sealing gasket is a polytetrafluoroethylene sheet or a polysiloxane sheet, and the thickness of the sealing gasket is 0.1mm-1mm. In an alternative embodiment of the present application, the infrared detection window includes an infrared detection through hole formed in the working electrode side end plate, and an infrared light-transmitting crystal embedded in the infrared detection through hole; The working electrode is a gold nano film or a silver nano film plated on the first end face of the infrared light-transmitting crystal, and the thickness of the working electrode is 50nm-200nm. In an alternative embodiment of the application, the infrared detection through hole is a round through hole, and the infrared light transmission crystal is a silicon crystal, a zinc selenide crystal or a germanium crystal; The second end of the infrared light-transmitting crystal comprises a middle end face perpendicular to the central axis of the infra