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Tungsten sulfide doped cobalt copper sulfide counter electrode catalyst with hollow nanotube structure as well as preparation method and application thereof

An electrode catalyst, cobalt copper sulfide technology, applied in circuits, capacitors, photovoltaic power generation, etc., can solve the problems of limiting low-cost commercial applications, high electrode cost, easy corrosion, etc., to achieve excellent electrocatalytic performance, short reaction time, cost low effect

Active Publication Date: 2021-03-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problems of high cost, low storage capacity and easy corrosion in electrolyte limit the large-scale and low-cost commercial application of Pt-based counter electrodes.

Method used

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  • Tungsten sulfide doped cobalt copper sulfide counter electrode catalyst with hollow nanotube structure as well as preparation method and application thereof
  • Tungsten sulfide doped cobalt copper sulfide counter electrode catalyst with hollow nanotube structure as well as preparation method and application thereof
  • Tungsten sulfide doped cobalt copper sulfide counter electrode catalyst with hollow nanotube structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 2.4 g of PVP in 180 mL of ethanol, and the resulting solution is solution A; dissolve 600 mg of cobalt acetate and 300 mg of copper acetate in 60 mL of ethanol solution, and the resulting solution is solution B. Solution B was slowly poured into solution A, and stirred in a water bath at 70 °C for 1 h to obtain Cu-Co nanotube precursor precipitation. After washing and drying the precipitated Cu-Co nanotube precursor obtained, 200 mg was dispersed in 60 mL of ethanol, and then 300 mg (NH 4 ) 2 WS 4 Dissolve in 20 mL deionized water; add the aqueous solution dropwise to the ethanol solution, stir at room temperature for 0.5 h, then centrifuge, wash and dry to obtain Cu-CoWS x . Cu-CoWS to be obtained x Take 150 mg and put it in a porcelain boat, in H 2 / Ar atmosphere was heated to 200 °C in a tube furnace, held for 1 h, and the heating rate was 1 °C / min, and finally the hollow nanotube structure tungsten sulfide doped cobalt copper sulfide CuCo 2 S 4 / WS ...

Embodiment 2

[0032] Dissolve 2.7 g of PVP in 180 mL of ethanol, and the resulting solution is solution A; dissolve 600 mg of cobalt acetate and 300 mg of copper acetate in 60 mL of ethanol solution, and the resulting solution is solution B. Solution B was slowly poured into solution A, and stirred in a water bath at 80 °C for 1 h to obtain Cu-Co nanotube precursor precipitation. After washing and drying the precipitated Cu-Co nanotube precursor obtained, 400 mg was dispersed in 60 mL of ethanol, and then 300 mg (NH 4 ) 2 WS 4 Dissolve in 15 mL deionized water; add the aqueous solution dropwise to the ethanol solution, stir at room temperature for 1 h, centrifuge, wash and dry to obtain Cu-CoWS x . Cu-CoWS to be obtained x Take 150 mg and put it in a porcelain boat, in H 2 / Ar atmosphere was heated to 200 °C in a tube furnace, held for 1.5 h, and the heating rate was 2 °C / min, and finally the hollow nanotube structure tungsten sulfide doped cobalt copper sulfide CuCo 2 S 4 / WS 2 Cou...

Embodiment 3

[0034] Dissolve 3.0 g of PVP in 180 mL of ethanol, and the resulting solution is solution A; dissolve 600 mg of cobalt acetate and 300 mg of copper acetate in 60 mL of ethanol solution, and the resulting solution is solution B. Solution B was slowly poured into solution A, and stirred in a water bath at 80 °C for 2 h to obtain Cu-Co nanotube precursor precipitation. After washing and drying the precipitated Cu-Co nanotube precursor obtained, 480 mg was dispersed in 60 mL of ethanol, and then 320 mg (NH 4 ) 2 WS 4 Dissolve in 12 mL deionized water; add the aqueous solution dropwise to the ethanol solution, stir at room temperature for 0.5 h, then centrifuge, wash and dry to obtain Cu-CoWS x . Cu-CoWS to be obtained x Take 150 mg and put it in a porcelain boat, in H 2 / Ar atmosphere was heated to 200 °C in a tube furnace, held for 1.5 h, and the heating rate was 3 °C / min, and finally the hollow nanotube structure tungsten sulfide doped cobalt copper sulfide CuCo 2 S 4 / WS...

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Abstract

The invention discloses a tungsten sulfide doped cobalt copper sulfide counter electrode catalyst (CuCo2S4 / WS2) with a hollow nanotube structure, compared with monometal sulfide, the catalyst has richer oxidation-reduction pairs and more excellent conductivity, WS2 is doped, and a large number of active sites are provided; meanwhile, the hollow structure provides a larger specific surface area andmore exposed active sites, the larger gap space of the hollow structure can also effectively reduce the ion migration resistance, so that more excellent electrochemical performance is achieved, the photoelectric conversion efficiency reaches 9.50% when the hollow structure is applied to a counter electrode of the DSSC, and photoelectric conversion efficiency is higher than that of the DSSC; and the material has good electrochemical stability in an I3- / I-electrolyte system, and after 1000 times of continuous cyclic voltammetry scanning, photoelectric conversion efficiency can still maintain 88.3% of the initial value.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a hollow nanotube structure tungsten sulfide doped cobalt copper sulfide counter electrode catalyst CuCo 2 S 4 / WS 2 And its preparation method and application. Background technique [0002] Due to its huge capacity, strong versatility, safety and environmental protection advantages, solar energy has broad development prospects among the various currently known renewable green energy sources. Dye-sensitized solar cells (DSSC) have the advantages of low cost, simple structure, and environmental protection. 3 − / I − redox pair) and an energy conversion device composed of a counter electrode, which can convert solar energy into electrical energy. As an extremely important part of DSSC, the role of the counter electrode is to catalyze the I in the electrolyte by collecting electrons from the external circuit. 3 − , reverting it to I − , so as to regenerate the dye in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
CPCH01G9/2022Y02E10/542
Inventor 钱兴黄杰杨亚杰
Owner FUZHOU UNIV
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