A magneto-optical synergistic electrocatalyst evaluation device

Abstract

A magneto-optic cooperative electrocatalyst evaluating device consists of an electrochemical reaction unit, an electrochemical testing unit, a magnetic field generation unit and an illumination control unit. The electrochemical reaction unit comprises an electrolytic tank, a working electrode, a reference electrode and a counter electrode. The working electrode is a rotary disc electrode or a rotary ring disk electrode coated with a to-be-tested catalyst film, and is positioned in a stable and constant magnetic field generated by the magnetic field generation unit. The magnetic field generation unit provides the stable and constant magnetic field for electrocatalytic reaction. The illumination control unit provides illumination for the electrocatalytic reaction, and light illuminates the working electrode of the electrochemical reaction unit.

Description

technical field [0001] The invention relates to an electrocatalyst evaluation device. Background technique [0002] Renewable energy power such as wind power, photovoltaic power generation, and solar thermal power generation has achieved rapid development worldwide, but the lack of capacity to accommodate renewable energy and the threat to grid stability when connected to the grid have become constraints. The main reason for the development of renewable energy power generation industry. The use of renewable energy to split water into hydrogen and convert electrical energy into chemical energy for storage has attracted more and more attention. Hydrogen energy storage has high energy density and no pollution. It is an energy storage technology that can be applied to power supply for very short or long periods of time. It is considered to be a new large-scale energy storage technology with great potential. [0003] The theoretical decomposition voltage of electrolyzed water i...

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Problems solved by technology

[0005] However, the traditional electrochemical system is not suitable for the research on the catalytic reaction process of electrolytic water under the condition of magneto-optical synergy. The main problems are as follows:

[0006] (1) If a magnetic field is directly applied to the traditional electrolytic cell, the magnetic field will affect the mass transfer process on the electrode surface through the Lorentz force, making it difficult to objectively evaluate the electrochemical reaction kinetics of the electrocatalyst under the condition of magneto-optical synergy

[0007] (2) A large number of bubbles will be generated during the water electrolysis process, which will not only hinder the mass transfer process on the electrode surface, but also cover the active sites on the surface of the electrocatalyst, and the adsorption / desorption process of the bubbles on the surface of the electrocatalyst is dynamically changing, which is not conducive to accurate Evaluating the Electrochemical Reaction Kinetics of Electrocatalysts under Magneto-Optic Synergy

[0008] (3) The three electrodes in the traditional three-electrode electrolytic cell are relatively close to each other in space. When a magnetic field and light are applied to the working electrode, it will inevitably affect the reference electrode and the counter electrode, which is not conducive to accurate evaluation of magneto-optic Electrocatalytic reaction process on the working electrode under synergistic conditions

In the past, the experimental devices for studying the reaction of electrolyzed water under a magnetic field applied a magnetic field directly to the traditional three-electrode electrolytic cell (such as the literature Kaya, Mehmet Fatih, et al."Investigation of alkaline water electrolysis performance for different cost effective electrodes under magnetic field."InternationalJournal of Hydrogen Energy(2017),42,17583.Elias,Liju,and A.ChitharanjanHegde."Effect of Magnetic Field on HER of Water Electrolysis on Ni–W Alloy."Electrocatalysis(2017):1.), so that the magnetic field cannot be The change of the mass transfer process caused by the magnetic field can be distinguished from the change of the electron transfer process on the electrode surface caused by the magnetic field; in the past, the experimental devices for studying the electrolysis of water under light were all using ordinary electrodes (such as the literature Liu, Guigao, et al. "Promoting active species generation by plasmon-induced hot-electron excitation for efficient electrocatalytic oxygenation."Journal of the American Chemical Society 138.29(2016):9128.Shi,Yi,et al."Hot electron of Au nanorods activates the electrocatalytic. of the American Chemical Society 137.23(2015):7365.), which cannot eliminate the adverse effects of the bubbles generated by the electrochemical reaction on the light on the surface of the working electrode

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