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Preparation method of polyfluorene derivative-supported noble metal catalyst

A technology of noble metal catalysts and derivatives, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc.

Inactive Publication Date: 2017-05-10
张东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report in the literature on its use as a fuel cell catalyst support.

Method used

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Experimental program
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Effect test

Embodiment 1

[0013] (1) Both the synthesis of poly-9-hydroxyfluorene (PHF) and the preparation of the composite catalyst Pt-Pd / PHF were performed by electrochemical methods, the electrochemical workstation used was still CHI 760E, the system was a three-electrode electrolyzer, and the working electrode was glass Carbon electrode (GC) or glassy carbon electrode modified by conductive polymer, counter electrode and reference electrode are platinum wire and saturated calomel electrode (SCE) respectively.

[0014] (2) The glassy carbon electrode was polished to a mirror surface with α-alumina polishing powder, then ultrasonicated with distilled water and ethanol for 5 minutes, rinsed and set aside.

[0015] (3) Before the experiment, continuously blow air into the electrolyte for 10 minutes to remove the oxygen in the solution. The electrochemical synthesis of PHF adopts cyclic voltammetry (CV) method, and the same number of CV circles is scanned in a certain voltage range, and the scanning ra...

Embodiment 2

[0018] (1) Both the synthesis of poly-9-hydroxyfluorene (PHF) and the preparation of the composite catalyst Pt-Pd / PHF were performed by electrochemical methods, the electrochemical workstation used was still CHI 760E, the system was a three-electrode electrolyzer, and the working electrode was glass Carbon electrode (GC) or glassy carbon electrode modified by conductive polymer, counter electrode and reference electrode are platinum wire and saturated calomel electrode (SCE) respectively.

[0019] (2) The glassy carbon electrode was polished to a mirror surface with α-alumina polishing powder, then ultrasonicated with distilled water and ethanol for 10 minutes, rinsed and set aside.

[0020] (3) Before the experiment, continuously blow air into the electrolyte for 10 minutes to remove the oxygen in the solution. The electrochemical synthesis of PHF adopts cyclic voltammetry (CV) method, and the same number of CV circles is scanned in a certain voltage range, and the scanning r...

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Abstract

The invention relates to a preparation method of a polyfluorene derivative-supported noble metal catalyst. The method comprises the following concrete preparation steps that (1) an electrochemical method is used for synthesizing poly 9-hydroxyfluorene (PHF) and preparing a composite catalyst Pt-Pd / PHF; (2) a glass carbon electrode is ground to the mirror surface state by alpha-aluminum oxide polishing powder, and is cleanly flushed for use; (3) a cyclic voltammetry (CV) method is used for PHF electrochemical synthesis, the same CV turn number is scanned in a certain voltage range; the scanning speed is controlled to be 50mVs<-1>; (4) the obtained polymer modified glassy carbon electrode (PHF / GC) is respectively and cleanly flushed by ethyl alcohol and distilled water and is directly used for Pt-Pd catalyst electro-deposition experiments. The Pt-Pd catalyst particles have uniform dispersion and small particle diameters on the surface of the PHF, so that the large electrochemical active area is realized; the PHF loaded Pt-Pd catalyst (Pt-Pd / PHF) has high electro-catalysis activity on the methanoic acid oxidation.

Description

technical field [0001] The invention relates to the field of fuel cell catalyst carrier materials, in particular to a preparation method of polyfluorene derivative-loaded noble metal catalysts. Background technique [0002] Due to their unique physical and chemical properties, conductive polymers have been extensively studied as catalyst supports for low-temperature fuel cells. Compared with traditional carbon material catalyst supports (such as carbon black), conductive polymers have some unique advantages as fuel cell catalyst supports: first, the preparation process of conductive polymers is simple, and the surface morphology is controllable and diverse; second, the conductive polymers have high conductivity. The good redox reversibility and electrochemical stability of the molecule can avoid the oxidation and corrosion problems faced by carbon materials as catalyst supports to a certain extent. The material-supported Pt catalyst has stronger resistance to CO poisoning; ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90B01J31/06
CPCH01M4/88H01M4/8817H01M4/9008H01M4/9075Y02E60/50
Inventor 张东
Owner 张东
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