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Surface treatment method for improving electro-catalysis hydrogen production performance

A surface treatment and electrocatalysis technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of reduced electrocatalytic hydrogen evolution performance and poor stability, and achieve the effects of excellent electrocatalytic performance, low cost and simple preparation method.

Inactive Publication Date: 2016-08-03
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of completing the hydrogen evolution reaction, the electrocatalytic hydrogen evolution (HER) performance of most transition metal phosphides is reduced and the stability is poor. Catalytic hydrogen evolution material performance is extremely necessary

Method used

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  • Surface treatment method for improving electro-catalysis hydrogen production performance
  • Surface treatment method for improving electro-catalysis hydrogen production performance
  • Surface treatment method for improving electro-catalysis hydrogen production performance

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A surface treatment method for improving electrocatalytic hydrogen production performance, comprising the following steps:

[0038] S1: Preparation of precursors by hydrothermal growth method:

[0039] S11, first dissolve 9mmol nickel chloride and 18mmol hexamethylenetetramine in 60mL deionized water to make a solution;

[0040] S12, then vertically fix the foamed nickel sheet cleaned with 3M hydrochloric acid and remove the surface oxide layer in the 100mL polytetrafluoroethylene liner equipped with the solution of step S11, and seal it with an autoclave;

[0041] S13. Put the polytetrafluoroethylene liner sealed in step S12 into an oven at 120° C. for 8 hours, and finally wash and dry the reaction product to obtain a nickel salt nanosheet precursor, that is, the nickel salt nanosheet precursor is long with nickel Nickel Foam with Salt Nanosheets.

[0042] S2: Prepare phosphorus-containing nanosheets by the precursor prepared in step S1:

[0043] S21. Using 0.9 g so...

Embodiment 2

[0049] The difference from Example 1 is:

[0050] In step S11, first dissolve 9 mmol of cobalt chloride and 18 mmol of urea in 60 mL of deionized water to make a solution; and the material obtained in S13 is a cobalt salt nanowire precursor, that is, the cobalt salt nanowire precursor is a cobalt salt nanowire long nickel foam;

[0051] In step S21, the sodium dihydrogen hypophosphite powder and the tailored cobalt salt nanowire precursor are put into the quartz tube, and the CoP nanowire is obtained through step S23;

[0052] In step S3, the CoP nanowire is used as the working electrode (i.e., the CoP nanowire electrocatalytic electrode), and the surface roughness and surface active sites of the CoP nanowire increase after CV cycle scanning, which improves the electrocatalytic production of the CoP nanowire. Hydrogen properties.

[0053] Draw the electrocatalytic activity diagrams before and after the CoP nanowire CV cycle treatment provided by this embodiment: as Figure ...

Embodiment 3

[0055] The difference from Example 1 is:

[0056] In step S11, first dissolve 3mmol nickel chloride, 6mmol cobalt chloride and 18mmol urea in 60mL deionized water to make a solution; and the material obtained in S13 is the precursor of nickel-cobalt salt nanowires, that is, the precursor of nickel-cobalt salt nanowires It is nickel foam with nickel-cobalt salt nanowires;

[0057] In step S21, the sodium dihydrogen hypophosphite powder and the trimmed nickel-cobalt salt nanowire precursor are put into the quartz tube, and the obtained NiCoP nanowire is obtained through step S23;

[0058] In step S3, the NiCoP nanowire is used as the working electrode (i.e., the NiCoP nanowire electrocatalytic electrode), and the surface roughness and surface active sites of the NiCoP nanowire increase after CV cycle scanning, which improves the electrocatalytic production of the NiCoP nanowire. Hydrogen properties.

[0059] Draw the electrocatalytic activity figure before and after the NiCoP ...

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Abstract

A surface treatment method for improving electro-catalysis hydrogen production performance comprises the steps of 1, preparing a precursor with the hydrothermal growth method; 2, preparing phosphorous nanosheets or nanowires by means of the precursor prepared in the step 1; 3, conducting CV scan round by means of a three-electrode system with the nanosheets or nanowires obtained in the step 2 as a working electrode, a saturated Ag / AgCl electrode as a reference electrode and a platinum sheet as a counter electrode, wherein the surface roughness and surface active sites of the phosphorous nanosheets or nanowires are both increased after scanning. The method has the advantages that by taking Ni2P nanosheets, CoP nanowires, NiCoP nanowires and other transition metal phosphides as the working electrode, the preparing method is simple and environmentally friendly, morphology is easy to control, preparation materials are abundant, and cost is low; after CV scan round is conducted with the transition metal phosphides as the working electrode, electro-catalysis hydrogen production performance is improved greatly, and electro-catalysis performance is excellent; besides, an electro-catalyst material capable of replacing a noble metal catalyst is obtained.

Description

technical field [0001] The invention relates to the technical field of electrolytic water catalytic hydrogen production materials, in particular to a surface treatment method for improving electrocatalytic hydrogen production performance. Background technique [0002] Energy shortage and environmental pollution are two serious problems faced by human beings in the process of sustainable development. Hydrogen is a sustainable, environmentally friendly energy carrier that can meet global energy needs. Noble metals are currently the most active catalysts for the electrocatalytic hydrogen evolution reaction, but unfortunately, due to their high cost and rarity, their use in large-scale hydrogen production is limited. Active materials are imminent. [0003] In recent years, researchers have done a lot of work on transition metal compounds, synthesized MoSx, WS 2 , MoC, CoS 2 , CoSe 2 , FeP, MoP, Ni 2 P, CoP and other low-priced, abundant electrocatalysts, in these electroca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/88H01M4/921Y02E60/50
Inventor 王喜娜童锐王浩周小龙肖凌峰郑铮
Owner HUBEI UNIV
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