Ultrasonic synthesis method and application of spiral ferronickel supramolecular network framework nano composite material

Abstract

The invention belongs to the field of oxygen reduction electro-catalysis, and particularly relates to an ultrasonic synthesis method and an application of a spiral ferronickel supramolecular network framework nano composite material. An active substance of the nano material is C@ NiFe2O4 and presents a spiral-like shape, and the ultrasonic synthesis method is simple, low in cost, and short in reaction time. And the synthesized composite material is high in yield, uniform in morphology, large in specific surface area and easy to realize industrial production. The method is used for overcoming the defects that an existing fuel cell catalyst is low in cathode oxygen reduction reaction reversibility and small in exchange current density, and a Pt-based catalytic material is high in cost, has toxicity and the like, and the obtained oxygen reduction catalyst has the advantages of high potential, excellent limiting current, high stability, methanol tolerance and the like so that as the high-efficiency electrocatalyst, the C@ NiFe2O4 has a great potential application value.

Description

technical field [0001] The invention belongs to the field of oxygen reduction electrocatalysis, and in particular relates to an ultrasonic synthesis method and application of a helical nickel-iron supramolecular network frame nanocomposite material. Background technique [0002] The current research on oxygen reduction electrocatalysts mostly focuses on compounds based on transition metal (Fe, Co, Ni, Mn) elements, mainly including oxides and their composite materials. Transition metals are often used to prepare electrocatalysts because of the diversity of adsorption sites and empty d-electron orbitals that can form chemisorption bonds due to unfilled orbitals and unpaired electrons. Compared with single metal oxides, bimetallic oxides may have higher catalytic activity, and even exhibit excellent catalytic activity in oxygen evolution and oxygen evolution reactions, and have attracted more and more attention from researchers. Among the supported transition metals, Co has h...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the existing fuel cell catalysts. At present, fuel cell catalysts generally face the low reversibility of cathode oxygen reduction reaction, low exchange current density, often accompanied by high overpotential, and Pt-based catalytic materials. Defects such as high cost and toxicity; based on the unique structure of cellulose, a helical nickel-iron supramolecular network framework nanocomposite has been developed, which has high onset potential, half-slope potential, excellent limiting current and excellent stability and methanol tolerance

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