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An electrochemical method for catalytic oxidation of methanol using ptcofe nanocatalysts with polygonal morphology

A nano-catalyst and catalytic oxidation technology, which is applied in electrochemical generators, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of low catalytic activity, high price, and short life of catalysts, and achieve wide application Prospect, effect of high active site density and excellent electrocatalytic activity

Inactive Publication Date: 2019-06-21
UNIV OF JINAN
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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention solves the technical problems that current Pt nanostructure catalysts are prone to poisoning, short life, high price, and low catalytic activity of catalysts in the prior art, and prepares a PtCoFe alloy with a polygonal morphology with high-density active sites Nanocatalysts to enhance the methanol electrooxidation performance of Pt nanostructured catalysts

Method used

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  • An electrochemical method for catalytic oxidation of methanol using ptcofe nanocatalysts with polygonal morphology
  • An electrochemical method for catalytic oxidation of methanol using ptcofe nanocatalysts with polygonal morphology
  • An electrochemical method for catalytic oxidation of methanol using ptcofe nanocatalysts with polygonal morphology

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Embodiment 1

[0022] Measure 1.0mL chloroplatinic acid (19.3mmol / L), 4.0mL concentration is the cobalt chloride of 1.66mmol / L and 3.0mL concentration is the iron trichloride aqueous solution of 1.66mmol / L in the 30ml reactor, then add poly Vinylpyrrolidone K30, hexadecyltrimethylammonium bromide CTAB and NaBr are stirred and dissolved with a magnetic stirrer, and then the air in the reactor is exhausted with hydrogen, and 0.8MPa hydrogen is introduced into the reactor, and then heated at 200°C The reaction is carried out under heating, and after the reaction is completed, through ethanol centrifugal washing, freeze-drying and other processing steps, the polygonal PtCoFe alloy nanoparticles (such as figure 2 Shown), wherein, the consumption range of polyvinylpyrrolidone K30 is 210mg, the consumption range of cetyltrimethylammonium bromide is 60mg, and the consumption of NaBr is identical with the consumption of cetyltrimethylammonium bromide.

[0023] Methanol fuel cell electro-oxidation te...

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Abstract

The invention relates to a PtCoFe nano-catalyst with a polygonal shape and research on the electrocatalytic performance of methanol. The prepared PtCoFe with polygonal morphology was used as catalyst. The catalyst was prepared with chloroplatinic acid, cobalt chloride and ferric chloride as raw materials, PVP as reducing agent and protective agent, adding CTAB and NaBr with specific content, and in hydrogen reducing atmosphere. The PtCoFe nanocatalyst with high selectivity was prepared under the following conditions, and the preparation method was green and clean. The obtained PtCoFe alloy catalyst particles with polygonal morphology have many step atoms and high active site density. The methanol electrooxidation test was carried out in 0.5M H2SO4+2M CH3OH electrolyte by cyclic voltammetry. Catalytic activity and broad application prospects.

Description

technical field [0001] The present invention relates to the field of electrochemical catalysts. Specifically, the present invention uses the prepared PtCoFe nano-catalyst with polygonal shape to catalyze the electrochemical oxidation of methanol. Background technique [0002] Due to its excellent catalytic performance and thermal stability, noble metal Pt nanostructure catalysts are widely used in industrial catalysis, biomimetic, electrocatalysis and other fields. However, due to some restrictive factors in practical applications, such as easy poisoning, short life and high price, this excellent nano-catalyst cannot be further promoted and applied. In order to solve these problems, researchers often use low-cost 3d transition metal elements to partially replace Pt to form Pt-based binary / multi-element alloy catalysts, and explore its morphology, composition and catalytic performance stability through condition control. relation. [0003] Among many transition metal eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92H01M8/1011B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/921H01M4/928H01M8/1011Y02E60/50
Inventor 高道伟吕一品李书娜陈国柱
Owner UNIV OF JINAN
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