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Preparation method of Cu2O-PtCu catalyst and application of Cu2O-PtCu catalyst in sodium borohydride electrooxidation

A catalyst, h2ptcl6 technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of poor stability of Pt-based catalysts, achieve good catalytic activity and stability, good development prospects, and improved stability

Inactive Publication Date: 2020-10-30
NANCHANG NORMAL UNIV
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Problems solved by technology

[0004] The present invention aims to provide a kind of Cu 2 The preparation method of O@PtCu catalyst and its application in the electro-oxidation of sodium borohydride have solved the technical problem of poor stability of Pt-based catalysts in the prior art

Method used

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  • Preparation method of Cu2O-PtCu catalyst and application of Cu2O-PtCu catalyst in sodium borohydride electrooxidation
  • Preparation method of Cu2O-PtCu catalyst and application of Cu2O-PtCu catalyst in sodium borohydride electrooxidation
  • Preparation method of Cu2O-PtCu catalyst and application of Cu2O-PtCu catalyst in sodium borohydride electrooxidation

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preparation example Construction

[0027] A Cu core-shell structure for sodium borohydride electrooxidation 2 The preparation method of O@PtCu catalyst, the method is prepared by the method of electro-displacement reaction, and the specific steps are as follows:

[0028] 1) Weigh 40 mg of pre-synthesized Cu 2 O octahedral powder was dissolved in 40 mL of water, 270 mg of polyvinylpyrrolidone (PVP) was added, the resulting mixture was ultrasonically treated for 10 min, and stirred for 5 min to disperse the solution evenly;

[0029] 2) Add different volumes of H under stirring condition 2 PtCl 6 (20mM) aqueous solution, reacted for 30min, then added 60μL of 36% acetic acid, continued to react for 60min under stirring conditions, centrifuged the resulting solution, washed with distilled water and absolute ethanol for 3 times, and finally dried at 40°C under vacuum for 12h, namely The target product was obtained.

[0030] The different volumes of H 2 PtCl 6 The aqueous solutions were 13.88, 4.63, 2.78, 1.98 a...

Embodiment 1

[0032] 1) Weigh 40 mg of pre-synthesized Cu 2 O octahedral powder was dissolved in 40 mL of water, 270 mg of polyvinylpyrrolidone (PVP) was added, the resulting mixture was ultrasonically treated for 10 min, and stirred for 5 min to disperse the solution evenly;

[0033] 2) Add 13.88mL of H to the mixture obtained in 1) with stirring 2 PtCl 6 (20mM) aqueous solution, reacted for 30min, then added 60μL of 36% acetic acid, continued to react for 60min under stirring conditions, centrifuged the obtained solution, washed with distilled water and ethanol for 3 times, and then dried at 40°C for 12h under vacuum condition to prepare The target product was obtained, and the obtained catalyst was denoted as Cu 2 O@PtCu-1.

[0034] The prepared catalyst is prepared as an electrode, placed in 10mmol / L NaBH 4 Electrochemical performance test in +0.1mol / LNaOH solution to study the reaction of catalyst to NaBH 4 Catalytic performance in electrooxidation.

Embodiment 2

[0036] With the step 2 in embodiment 1) in H 2 PtCl 6 The add-on of aqueous solution is changed into 4.63mL, and other steps are with embodiment 1, and the catalyst obtained is recorded as Cu2 O@PtCu-2. The catalytic performance research of the electrocatalytic sodium borohydride oxidation is the same as that in Example 1.

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Abstract

The invention provides a preparation method of a Cu2O-PtCu catalyst and application of the Cu2O-PtCu catalyst in sodium borohydride electrooxidation. The method comprises the following steps of dissolving Cu2O octahedral powder in water, adding polyvinylpyrrolidone, carrying out ultrasonic treatment, and stirring to uniformly disperse the mixture; adding a specific amount of H2PtCl6 aqueous solution for reaction under a stirring condition, adding acetic acid for continuous reaction, and sequentially performing solid-liquid separation, cleaning and drying after the reaction is finished to obtain a finished product. According to the preparation method, Cu2O and H2PtCl6 with octahedral structures are used as precursors; the Cu2O-PtCu catalyst with a core-shell structure is prepared at room temperature by utilizing an electric replacement reaction method, the prepared catalyst has good catalytic activity and stability on electrocatalytic oxidation of sodium borohydride, the performance ofthe catalyst is 1.5 times that of commercial Pt / C, and stability is improved by 50%. The method is simple and convenient to operate and has a good development prospect.

Description

technical field [0001] The invention relates to the technical field of fuel cell anode catalysts, in particular to a Cu 2 Preparation method of O@PtCu catalyst and its application for electrooxidation of sodium borohydride. Background technique [0002] Fuel cells have become a new energy technology actively researched and developed by humans because of their advantages such as high power density, high conversion efficiency, and low pollution. Direct borohydride fuel cell (DBFC) is a green new energy technology that combines hydrogen energy and fuel cells. It can store chemical energy (hydrogen energy, such as NaBH 4 Hydrogen content is 10.6%) into electricity. Compared with general fuel cells, DBFC has the advantages of higher theoretical output voltage and power density, excellent performance, convenient transportation and storage, no pollution, and can operate at room temperature, so it has attracted much attention. However, the performance of DBFC is controlled by its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCH01M4/921H01M4/925Y02E60/50
Inventor 罗明洪夏克坚葛文包雨澜
Owner NANCHANG NORMAL UNIV
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