Preparation method and application of ruthenium-doped cobalt phosphide electrocatalyst

A catalyst, cobalt-electric technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of high overpotential

Active Publication Date: 2021-04-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in pure CoP, the strong adsorption of hydrogen intermediates on Co sites leads to a high overpotential in the electrocatalytic hydrogen evolution reaction.

Method used

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  • Preparation method and application of ruthenium-doped cobalt phosphide electrocatalyst
  • Preparation method and application of ruthenium-doped cobalt phosphide electrocatalyst
  • Preparation method and application of ruthenium-doped cobalt phosphide electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of Ru-doped CoP electrocatalysts (Ru-CoP-1NAs) based on carbon cloth (CC):

[0042] The commercial carbon cloth was refluxed with nitric acid for 10 h at 120 °C, followed by ultrasonic cleaning with acetone, ethanol and deionized water.

[0043] Weigh 0.5821g Co(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water, and after stirring evenly, solution A was obtained; 1.3136g 2-methylimidazole (C 4 h 6 N 2 ) was dissolved in 40mL deionized water, and stirred evenly to obtain solution B; then solution B was poured into solution A, and stirred evenly to form a blue solution; the cleaned carbon cloth (2cm×5cm) was immersed in the blue precursor After the reaction, the carbon cloth turned blue, and then the carbon cloth was taken out, washed with water and alcohol, and dried at 60°C for 12 hours to obtain Co-MOF.

[0044] Weigh 1.2g NaOH and dissolve in 49mL deionized water, add 1mL RuCl 3 (5mg mL -1 ) solution was stirred evenly, and the Co-MOF was imme...

Embodiment 2

[0047] Preparation of Ru-doped CoP electrocatalysts (Ru-CoP-2.5NAs) based on carbon cloth (CC):

[0048] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is that: RuCl 3 The volume of the solution was 2.5 mL, and the volume of deionized water was 47.5 mL.

Embodiment 3

[0050] Preparation of Ru-doped CoP electrocatalysts (Ru-CoP-5NAs) based on carbon cloth (CC):

[0051] The preparation method of this electrocatalytic material is basically the same as that of Example 1, the difference is that: RuCl 3 The volume of the solution was 5 mL, and the volume of deionized water was 45 mL.

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Abstract

The invention belongs to the field of electrocatalysts, and discloses a preparation method and application of a ruthenium-doped cobalt phosphide electrocatalyst for producing hydrogen by high-performance electrochemical decomposition of water. The method comprises the following steps: synthesizing a Co-MOF precursor with an open skeleton through a simple aging reaction, and further forming a RuCo-MOF catalyst with a mesoporous nanostructure through ion etching; and finally, carrying out low-temperature phosphating reaction to obtain the Ru-CoP hollow porous nanocube electrocatalyst. The series of metal-doped phosphides have relatively low charge transfer resistance and reaction potential barrier of hydrogen evolution reaction, and have excellent performance in electro-catalytic hydrogen evolution reaction. Meanwhile, the catalyst is low in cost, simple and convenient to operate, simple in process and excellent in catalytic performance, and provides basic application research for the material in the field of electrocatalysis.

Description

technical field [0001] The invention belongs to the field of electrocatalysts, and relates to a preparation method and application of a hollow cation-doped phosphide electrocatalyst for electrochemically decomposing water to produce hydrogen with high performance, in particular to a preparation method and application of a ruthenium-doped cobalt phosphide electrocatalyst . [0002] technical background [0003] Renewable energy has dual significance for solving energy shortage and environmental pollution. Hydrogen energy has become an ideal substitute for traditional fossil fuels due to its high energy density, zero emissions and abundant earth resources. Hydrogen production by electrolysis of water is sustainable, environmentally friendly and high-purity gas, and has excellent application prospects in hydrogen energy development technology. Hydrogen production by electrolysis of water requires efficient electrocatalysts to lower the reaction barrier and improve energy conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/091C25B11/065C25B11/052
CPCY02E60/36
Inventor 姜德立徐胜杰李娣刘雨
Owner JIANGSU UNIV
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