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Preparation method of platinum nanowire particle catalyst

A technology of platinum nanowires and particles, which is applied in the field of platinum nanowire particle catalysts, can solve problems affecting the application of technology, achieve precise reaction process, improve the effect of wide scale range, and reduce platinum loading

Active Publication Date: 2020-11-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous Chinese invention patent CN103280583B, in order to obtain one-dimensional platinum nanowires (Pt-NWs), it takes a long time (48-72h) to grow Pt in situ, which affects the technical application

Method used

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  • Preparation method of platinum nanowire particle catalyst
  • Preparation method of platinum nanowire particle catalyst
  • Preparation method of platinum nanowire particle catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 10mg conductive carbon black (specific surface area 1400m 2 / g), 1mL H 2 PtCl 6 Solution (concentration: 50mmol / L), 0.4mL formic acid solution (concentration: 1.4mol / L), 0.5mL PVP (concentration: 10mg / mL) and 12mL deionized water are configured as a reaction slurry, and the slurry is mixed evenly by ultrasonic treatment ;

[0031] (2) Pour the prepared slurry into the electrolytic cell reactor, place it in an environment of 20° C. and apply a DC electric field of -0.10 V for 48 hours to deposit platinum particles;

[0032] (3) Take out the reacted slurry, filter it, wash it repeatedly with deionized water for 2-3 times, and dry it at 80° C. to obtain platinum nanowire particles (Pt-NWs) catalyst powder.

Embodiment 2

[0034] (1) 10mg conductive carbon black (specific surface area 1400m 2 / g), 1mL H 2 PtCl 6 Solution (concentration: 50mmol / L), 0.4mL formic acid solution (concentration: 1.4mol / L), 0.5mL PVP (concentration: 10mg / mL) and 12mL deionized water are configured as a reaction slurry, and the slurry is mixed evenly by ultrasonic treatment ;

[0035] (2) Pour the prepared slurry into the electrolytic cell reactor, place it in an environment of 20° C. and apply a DC electric field of -0.20 V for 48 hours to deposit platinum particles;

[0036] (3) Take out the reacted slurry, filter it, wash it repeatedly with deionized water for 2-3 times, and dry it at 80° C. to obtain platinum nanowire particles (Pt-NWs) catalyst powder.

Embodiment 3

[0038] (1) 10mg conductive carbon black (specific surface area 1400m 2 / g), 1mL H 2 PtCl 6 Solution (concentration: 50mmol / L), 0.4mL formic acid solution (concentration: 1.4mol / L), 0.5mL PVP (concentration: 10mg / mL) and 12mL deionized water are configured as a reaction slurry, and the slurry is mixed evenly by ultrasonic treatment ;

[0039] (2) Pour the prepared slurry into the electrolytic cell reactor, place it in an environment of 20° C. and apply a DC electric field of -0.35 V for 48 hours to deposit platinum particles;

[0040](3) Take out the reacted slurry, filter it, wash it repeatedly 2 to 3 times with deionized water, and dry it at 80°C to obtain platinum nanoparticles (Pt-NPs) and platinum nanowire particles (Pt-NPs) -NWs) mixed catalyst powder.

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Abstract

The invention discloses a preparation method of platinum nanowire particle catalyst (Pt-NWs), which comprises: carrying out ultrasonic mixing on a platinum precursor, a conductive carbon black powder,a masking agent and a reducing agent to prepare a slurry, placing the slurry in an electrolytic tank reactor, and applying an electric field effect with a voltage range of 0.10-0.35 V to prepare theplatinum nanowire particle with controllable size and morphology. According to the method, the chemical reaction rate with the platinum precursor solution is adjusted through the type, concentration and the like of the reducing agent, the ion diffusion rate of the platinum precursor is enhanced under the action of an electric field, and the size and morphology of platinum nanowire particles are accurately controlled. The method can be applied to a reaction process sensitive to a platinum nanostructure, such as an oxygen reduction reaction (ORR) in a fuel cell, so as to prepare the fuel cell cathode platinum-based catalyst with high catalytic performance. The preparation method is simple and efficient and integrates the advantages of an electro-deposition method and a chemical reduction method for preparing the nano platinum, thereby ensuring good dispersity of platinum particles and accurate controllability of scale and morphology.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a platinum nanowire particle catalyst. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel into electrical energy through catalysis. Commonly used fuels include hydrogen, methanol, and methane, which generate water, carbon dioxide, etc. after the reaction, which is environmentally friendly and non-polluting. Fuel cell technology has the characteristics of high energy conversion rate, fast load response, high operating quality, and environmental protection. Proton exchange membrane fuel cell (PEMFC) is a kind of fuel cell. It has the advantages of simple structure, easy operation, quick start, low working temperature and high specific power. It has broad application prospects in portable power supply, electric vehicles and working power stations. . However, the kinetics of oxygen reduction reaction (ORR) at...

Claims

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Application Information

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IPC IPC(8): B01J23/42B82Y30/00B82Y40/00H01M4/92
CPCB01J23/42H01M4/921B82Y30/00B82Y40/00B01J35/33Y02E60/50
Inventor 隋升王睿卿
Owner SHANGHAI JIAO TONG UNIV
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