Coated electrode for catalytic hydrogen evolution, and preparation method thereof

Abstract

A coated electrode for catalytic hydrogen evolution comprises a Ti substrate and a (W,Fe) C-P coating arranged on the surface of the Ti substrate. The (W,Fe)C-P coating with catalytic activity is directly prepared on the Ti substrate electrode. Compared with a traditional coated electrode prepared by adopting an adhesive, the coated electrode of the invention is better in binding force and betterin stability, and has prolonged service life; and low-price (W,Fe)C alloy has high hydrogen evolution catalytic activity, and introduction of the P element into (W,Fe) C further improves the catalyticactivity of catalytic hydrogen evolution, increases the working efficiency of catalytic hydrogen evolution and reduce the cost for preparing the coating electrode for catalytic hydrogen evolution.

Description

technical field [0001] The invention relates to a coated electrode for catalyzing hydrogen evolution and a preparation method thereof. Background technique [0002] Energy is an important basis for human survival and a driving force for national economic and social development. With the continuous increase of people's demand for energy and the seriousness of environmental pollution, seeking clean and sustainable energy has become an urgent problem for human beings. Hydrogen (H 2 ) as a clean energy will play an important role in the future energy landscape, however, hydrogen does not exist naturally and needs to be prepared through certain methods. Hydrogen production by electrolysis of water has the advantages of low cost, high efficiency, environmental friendliness, and good safety. It is an ideal way to convert electrical energy into chemical energy and is favored by people. At present, the most active solid-state catalyst for electrocatalytic hydrogen evolution reacti...

AI Technical Summary

Problems solved by technology

At present, the most active solid-state catalyst for electrocatalytic hydrogen evolution reaction is noble metal platinum (Pt), but the high cost and low reserves severely limit the industrial application of noble metal materials.

In addition, most of the electrodes used to catalyze the hydrogen evolution reaction use binders to coat powdered catalytic materials on the base electrodes. Due to the poor adhesion of the binder itself, it is easy to fall off during the electrolysis process, thereby reducing the electrode’s durability. job stability

At the same time, the binder will increase the electrode resistance, reduce the active sites exposed to the solution, and reduce the diffusion rate of reactive ions, thereby greatly reducing the hydrogen evolution efficiency of the electrode.

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