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Phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and preparation method thereof

A technology of tungsten oxide nanowires and flexible arrays, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve problems affecting intrinsic catalytic performance, electronic disturbance, etc., achieve excellent catalytic performance and long-term stability, and increase surface area , to promote the effect of mass transport

Active Publication Date: 2019-11-05
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Doping foreign atoms in tungsten sulfide will cause electronic disturbance, which will affect its intrinsic catalytic performance.

Method used

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  • Phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and preparation method thereof
  • Phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and preparation method thereof
  • Phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and preparation method thereof

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0043] A method for preparing phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode, comprising the following steps:

[0044] Step 1, carbon cloth pretreatment: ultrasonically clean the carbon cloth with acetone, ethanol and deionized water for 1 to 2 times respectively, and set aside;

[0045] Step 2. Prepare carbon cloth with tungsten oxide seeding layer: Dissolve sodium tungstate and hydrogen peroxide solution in deionized water according to a certain ratio of material to liquid, adjust the pH of the solution to 1-1.2, and prepare the carbon cloth treated in step 1 Electrodeposit tungsten oxide in the solution, then after high temperature treatment, wash and dry to obtain carbon cloth with tungsten oxide seeding layer;

[0046] Step 3. Configure the tungsten oxide nanowire hydrothermal reaction solution: Dissolve sodium tungstate and acetic acid in deionized water according to a certain ratio of material to liquid, add a certai...

specific Embodiment approach 2

[0062] A phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode prepared according to the preparation method described in specific embodiment 1, with a current density of 10mAcm -2 When the overpotential is 89mV.

[0063] A phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode described in this embodiment is subjected to a linear sweep voltammetry test method, the voltage setting range is 0 to -1V, and the current setting is 5mV. The test results are as follows Figure 12 shown, from Figure 12 It can be seen from the above that the phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode has excellent electrochemical performance, and the current density is 10mAcm -2 When the overpotential is 89mV, the overpotential represents the difference between the electrode potential when the electrode reaction deviates from equilibrium and the equilib...

specific Embodiment approach 3

[0067] A method for preparing phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode, comprising the following steps:

[0068] Step 1, carbon cloth pretreatment: ultrasonically clean the carbon cloth with acetone, ethanol and deionized water for 1 to 2 times respectively, and set aside;

[0069] Step 2. Prepare carbon cloth with tungsten oxide seeding layer: Dissolve sodium tungstate and hydrogen peroxide solution in deionized water according to a certain ratio of material to liquid, adjust the pH of the solution to 1-1.2, and prepare the carbon cloth treated in step 1 Electrodeposit tungsten oxide in the solution, then after high temperature treatment, wash and dry to obtain carbon cloth with tungsten oxide seeding layer;

[0070] Step 3. Configure the tungsten oxide nanowire hydrothermal reaction solution: Dissolve sodium tungstate and acetic acid in deionized water according to a certain ratio of material to liquid, add a certai...

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Abstract

The invention discloses a phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and a preparation method thereof, and belongs to the field of preparationmethods of electrocatalytic electrode materials. The method comprises the steps that after a carbon cloth with a tungsten oxide inoculation layer is prepared, sodium tungstate and acetic acid are dissolved in deionized water, concentrated nitric acid is added to a solution obtained after complete dissolution, and stirring continues until the solution is clarified; then ammonium sulfate is added,a tungsten oxide nanowire hydrothermal reaction solution is obtained after uniform stirring and placed in a high-pressure reaction kettle for a hydrothermal reaction, sodium hypophosphite and sulfur powder are uniformly mixed and then placed in the upstream portion of a double-temperature-zone tubular furnace, and a prepared tungsten oxide nanowire array is placed in the downstream portion of thedouble-temperature-zone tubular furnace; under the protection of argon gas, the upstream temperature of the tubular furnace is controlled to be 280-300 DEG C, the downstream temperature of the tubularfurnace is controlled to be 750-850 DEG C, and the phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode is obtained after a constant-temperature reaction is conducted for a certain period of time. The electrode has excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the field of preparation methods of electrocatalytic electrode materials; in particular, it relates to a phosphorus-doped tungsten sulfide@tungsten oxide porous core-shell nanowire flexible array electrode and a preparation method thereof. Background technique [0002] Renewable green energy has become a research hotspot in recent years. Hydrogen is considered as an environmentally friendly clean energy carrier. Electrochemical water splitting for hydrogen production replaces fossil fuels and is a clean, renewable method. In recent years, hydrogen production by water splitting hydrogen production reaction (HER) has received extensive attention and is likely to become the main method for hydrogen production. This depends on the design and synthesis of efficient electrocatalysts. Currently, platinum-based metals and platinum-based alloys are the most effective catalysts. Unfortunately, the shortage and high price of these pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 陈明华王凡陈庆国
Owner HARBIN UNIV OF SCI & TECH
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