Scanning electrochemical microscope experimental device for tests in various environments

Abstract

The invention provides an SECM (scanning electrochemical microscope) experimental device for tests in various environments. The SECM experimental device comprises a square glass shield, a gas inlet tube, an exhaust tube, a carrying plate with an electrolytic tank, a glass shield cover plate, a probe, a reference electrode, a counter electrode, a plastic cone, a probe support and rubber sealing rings. The integral square glass shield is formed by means of pouring and comprises a front side plate, a rear side plate, a left side plate and a right side plate which are identical, the carrying plate with the electrolytic tank is mounted at the bottom of the square glass shield, and the glass shield cover plate is placed on the upper portion of the glass shield. The plastic cone with the probe support is fixed into a circular hole of the rear side plate of the square glass shield, the top of the plastic cone can move in front-rear, left-right and up-down directions, and the probe support on the plastic cone can drive the probe to perform scanning and testing in different regions of a working electrode; gas can be injected onto the device via the gas inlet tube, and scanning electrochemical tests can be performed in environments with gas, mixed gas, gas and liquid interfaces and the like. The SECM experimental device is suitable for scanning electrochemical test research on metal materials in the various environments.

Description

Technical field: [0001] The invention relates to a scanning electrochemical microscope experimental device used for testing in various environments (such as liquid environment, gas-liquid coexistence environment, etc.). Background technique [0002] Scanning Electrochemical Microscopy (SECM) was developed in the late 1980s by A. J. A scanning probe microscopy technique proposed and developed by Bard's group. It works on the basis of electrochemical principles, and can measure the electrochemical current given by the oxidation or reduction of substances in the micro-area. It can not only give the topography of the sample surface, but also provide rich chemical information. [0003] Currently, scanning electrochemical microscopy (SECM) is used to study the distribution of chemical or biological activity on the sample surface, the homogeneity of submonolayer adsorption, measure the speed of fast heterogeneous charge transfer, the speed of primary or secondary subsequent react...

AI Technical Summary

Problems solved by technology

However, with the continuous deepening and refinement of the research, during the experiment, using the set of experimental equipment that comes with the scanning electrochemical microscope has the following disadvantages: (1) Scanning electrochemical testing cannot be performed in a gas or mixed gas environment Experiments, especially the experimental research on the electrochemical reaction process of certain substances on metal materials when simulating metal materials in the formation environment or specific use environment, when there are multiple mixed gases; (2) Scanning under the gas / liquid interface is not possible Electrochemical test research, kinetic research, etc.

At present, although the SECM experimental device improved in response to the above problems can realize electrochemical test research in a gas environment, the probe of the experimental device cannot move back and forth, left and right, and up and down, so it cannot test the electrochemical properties of different regions of the working electrode. characteristics, and cannot reflect the real morphology of each region of the working electrode during the electrochemical reaction process, thus limiting the main functions of the SECM experimental device before improvement

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