Cobalt-based multifunctional catalyst simulating branch and leaf structure of pinus thunbergii and preparation method of cobalt-based multifunctional catalyst

Abstract

The invention discloses a cobalt-based multifunctional catalyst imitating a pinus thunbergii branch and leaf structure and a preparation method thereof, and belongs to the technical field of catalyst preparation, the cobalt-based multifunctional catalyst takes carbon paper as a substrate, a Co-MOF sheet grows on the surface of the substrate, a carbon nanotube grows on the surface of the Co-MOF sheet, cobalt cluster particles are distributed on the tube wall of the carbon nanotube, and the cobalt cluster particles are uniformly distributed on the surface of the Co-MOF sheet. The catalyst has a spatial structure on the microscopic scale, is large in specific surface area and high in porosity, catalytic active sites are not stacked, and the catalyst has excellent three catalytic performances of oxygen evolution, hydrogen evolution and oxygen reduction. The catalyst prepared by the method disclosed by the invention has a self-supporting 3D structure, and compared with a traditional powdery catalyst, the catalyst avoids reduction of catalytic activity caused by use of a binder, and is more firmly combined with a substrate, so that the catalyst has better conductivity, higher catalytic activity and better stability; the used raw materials are non-noble metals, the cost is low, the preparation process is simple, and the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and particularly relates to a cobalt-based multifunctional catalyst imitating black pine branch and leaf structure and a preparation method thereof. Background technique [0002] With the development of science and technology, the development of clean energy that can replace fossil energy has become an urgent problem and hot spot. Proton exchange membrane fuel cells have become the focus of solving energy and environmental problems due to their advantages of energy saving, high conversion efficiency and near-zero pollution emissions, and have excellent application potential in the field of new energy. However, the catalysts used in fuel cells have problems such as insufficient catalytic activity, poor stability and short service life, which greatly limit the application of fuel cells. [0003] At present, precious metals such as platinum and palladium are widely used as catalysts in...

AI Technical Summary

Problems solved by technology

However, the usually prepared carbon material catalyst will inevitably be mixed with the binder during use, resulting in a decrease in its activity, and because it does not have a microscopic three-dimensional structure, the active sites are stacked and covered with each other, which will also reduce its catalytic activity and catalytic efficiency.

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