Preparation method of zinc-air battery catalyst and application thereof in catalyzing ORR, OER and HER reactions
A zinc-air battery and catalyst technology, which is applied in the field of zinc-air battery catalysts, can solve the problems of high price, difficulty in exerting catalytic activity, and small reserves of precious metals, and achieve the effects of improving catalytic activity, improving electrocatalytic performance, and increasing specific surface area
Inactive Publication Date: 2018-12-18
HENAN NORMAL UNIV
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Problems solved by technology
Common catalysts include noble metal catalysts and non-precious metal catalysts, but precious metals are scarce and expensive; and it is difficult for a single non-noble metal to exert its inherent catalytic activity
Method used
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Embodiment 1
[0026] Step S1: Add 249mg of cobalt nitrate and 328mg of 2-methylimidazole into 50mL of methanol, stir and mix evenly, let stand at room temperature for 24h, wash with ethanol for several times and then vacuum dry to obtain the precursor MOF;
[0027] Step S2: Add 37.5 mg of the precursor MOF obtained in step S1, 25 mg of 2-mercaptobenzothiazole, and 12.5 mg of triphenylphosphine into 40 mL of ethanol and heat it to 90 ° C in a water bath for 7 h, and then centrifuge and wash with ethanol for several times Vacuum drying to obtain a purple sample with wrinkled and fine nano-assembled structures on the surface;
[0028] Step S3: Add 90 mg of the purple sample with wrinkled fine nano-assembled structure on the surface obtained in step S2 and 30 mg of nickel nitrate as a nickel source dopant into 40 mL of ethanol and stir at room temperature for 7 h, centrifuge washing with ethanol for several times and then vacuum dry to obtain A light green sample with a hollow structure;
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Abstract
The invention discloses a preparation method of a zinc-air battery catalyst and application thereof in catalyzing ORR, OER and HER reactions, belonging to the technical field of the zinc-air battery catalysts. The technical scheme of the invention mainly comprises the following steps: a wrinkled fine structure guiding agent is introduced to a precursor MOF, a sulfur element and a phosphorus element are simultaneously introduced while the surface of the precursor MOF is formed into a wrinkled fine nano-assembly structure, a nickel source dopant and a magnesium source dopant are respectively introduced, and a zinc-air battery catalyst is synthesized at normal temperature. The zinc-air battery catalyst prepared by the invention has the characteristics of the surface wrinkled fine assembly structure and hollow structure, the specific surface area is increased, so the contact area between the catalyst and an electrolyte is enlarged, and the electrocatalytic performance is improved. The introduction of the sulfur and phosphorus elements increases the effective catalytic activity center and the delocalization of carbon atom charges, so the catalytic activity of the catalyst is improved.
Description
technical field [0001] The invention belongs to the technical field of zinc-air battery catalysts, and in particular relates to a preparation method of a zinc-air battery catalyst and its application in catalyzing ORR, OER and HER reactions. Background technique [0002] Due to the increasingly serious environmental pollution and energy crisis, the development of new energy is imminent. New energy conversion devices such as zinc-air batteries have the advantages of environmental friendliness and high energy conversion efficiency. They have experimental applications in many fields and have attracted more and more attention. In addition, the zinc-air battery is small in size, large in charge capacity, small in mass, can work normally in a wide temperature range, has no corrosion, and works safely and reliably. Compared with the closed system lithium-ion battery, since the zinc-air battery is a semi-open system, the air in the environment is used to provide oxygen, which reduc...
Claims
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IPC IPC(8): H01M4/90H01M12/08
CPCH01M4/9075H01M12/08Y02E60/10
Inventor 白正宇李珊珊张庆陈忠伟常方方
Owner HENAN NORMAL UNIV