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Preparation method and application of cobalt phosphide porous nanowire/stainless steel composite electrocatalyst

A porous nanowire and electrocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limiting the wide application of electrocatalytic hydrogen evolution, consuming large electric energy, scarcity, etc., to achieve excellent The effect of electrocatalytic hydrogen evolution performance, widening source, good stability and persistence

Inactive Publication Date: 2018-10-16
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a large amount of electric energy is consumed in the process of electrolyzing water, and it is necessary to find an efficient electrocatalyst to reduce the overpotential of electrolyzed water.
[0003] Among the current electrocatalytic hydrogen evolution materials, precious metals such as platinum have the best hydrogen evolution performance, but their scarcity and high cost limit their wide application in electrocatalytic hydrogen evolution.

Method used

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  • Preparation method and application of cobalt phosphide porous nanowire/stainless steel composite electrocatalyst
  • Preparation method and application of cobalt phosphide porous nanowire/stainless steel composite electrocatalyst
  • Preparation method and application of cobalt phosphide porous nanowire/stainless steel composite electrocatalyst

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Embodiment 1

[0032] A preparation method of cobalt phosphide porous nanowire / stainless steel composite hydrogen evolution electrocatalyst, the specific steps are as follows:

[0033] A. Stainless steel pretreatment, cut 316 stainless steel (316-SS) into a size of 1.5×2 cm, put it in the prepared 1M HCl solution for ultrasonic treatment for 1 hour, then put it in acetone for ultrasonic treatment for 1 hour, finally wash with water, alcohol Washing and drying to obtain pretreated Type 316 stainless steel,

[0034] Using carbon cloth as the base material for comparison, cut the carbon cloth into 1.5×2cm, and dry it with acetone, ethanol, and water respectively to obtain the pretreated carbon cloth;

[0035] B. Synthesize the precursor of CoP / SS by hydrothermal method, weigh 10mmol of urea, 4mmol of ammonium fluoride, and 2mmol of CoCl 2 ·6H 2 O is dissolved in the deionized water of 40ml volume, then supersonic 15min forms the homogeneous and stable solution, it is transferred in the polyte...

Embodiment 2

[0045] A preparation method of cobalt phosphide porous nanowire / stainless steel composite hydrogen evolution electrocatalyst, the specific steps are as follows:

[0046] A. Pretreatment of stainless steel, cut 316 stainless steel (316-SS) into a size of 1.5×2 cm, put it into the prepared 1.5M HCl solution for ultrasonic treatment for 1.5h, then put it into acetone for ultrasonic treatment for 1.5h, Finally, wash with water, wash with alcohol, and dry to obtain pretreated Type 316 stainless steel;

[0047] B. Synthesize the precursor of CoP / SS by hydrothermal method, weigh 11mmol of urea, 5mmol of ammonium fluoride, and 3mmol of CoCl 2 ·6H 2 O is dissolved in the deionized water of 42ml volume, then supersonic 15min forms the homogeneous and stable solution, it is transferred to the polytetrafluoroethylene (PTFE) lined autoclave of 50ml, puts the stainless steel that handles into the kettle, at 140 Hydrothermal reaction at ℃ for 8 hours, washed with deionized water, and dried...

Embodiment 3

[0050] A preparation method of cobalt phosphide porous nanowire / stainless steel composite hydrogen evolution electrocatalyst, the specific steps are as follows:

[0051] A. Pretreatment of stainless steel, cut 316 stainless steel (316-SS) into a size of 1.5×2 cm, put it in the prepared 2M HCl solution for ultrasonic treatment for 2 hours, then put it in acetone for ultrasonic treatment for 2 hours, finally wash with water, alcohol Washing and drying to obtain pretreated 316 type stainless steel;

[0052] B. The precursor of CoP / SS is synthesized by hydrothermal method, weighing 12mmol of urea, 6mmol of ammonium fluoride, and 4mmol of CoCl 2 ·6H 2 O is dissolved in the deionized water of 45ml volume, then supersonic 15min forms the homogeneous and stable solution, it is transferred to the polytetrafluoroethylene (PTFE) lined autoclave of 50ml, puts the stainless steel that handles into the kettle, at 150 Hydrothermal reaction at ℃ for 10 h, washed with deionized water, and dr...

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Abstract

The invention belongs to the technical field of electrocatalysts and relates to preparation of hydrogen evolution electrocatalysts, in particular to a preparation method of a cobalt phosphide porous nanowire / stainless steel composite electrocatalyst, comprising: cutting stainless steel into a stainless steel base sheet of required size that is pretreated by pickling, dissolving urea, ammonium fluoride and CoCl2 6H2O in deionized water, adding the base sheet, allowing hydrothermal reaction at 120-160 DEG C for 6-10 h to obtain a CoP / SS precursor, and calcining at a high temperature, and phosphating the CoP / SS precursor with sodium hydrogen hypophosphite by calcining at 350-450 DEG C for 3-5 h to obtain the electrocatalyst. Since the stainless steel of low cost is introduced to electrocatalytic hydrogen evolution materials, the range of origins of hydrogen evolution materials is widened. The preparation method is simple and economical and facilitates large-scale industrial production; the prepared catalyst has excellent electrocatalytic hydrogen-evolving performance, good stability and good durability, and is significant to solving energy crisis in future.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and relates to the preparation of hydrogen evolution electrocatalysts, in particular to a preparation method and application of a cobalt phosphide porous nanowire / stainless steel composite electrocatalyst. Background technique [0002] Since the beginning of the 21st century, the major problems and challenges facing mankind are energy and the environment. Therefore, the development of new, recyclable and clean energy will be the key to solving this problem. Under the dual pressure of energy crisis and environmental pollution, hydrogen energy has become the most promising clean energy to replace existing fossil fuels due to its high combustion value, no pollution, and renewable advantages. There are many ways to produce hydrogen, for example: hydrogen production from fossil fuels, the disadvantages are: complex process, high energy consumption, and environmental pollution; photocatalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B11/03C25B11/06C25B1/04
CPCC25B1/04B01J27/1853C25B11/031C25B11/051B01J35/58Y02E60/36
Inventor 张科伟毛宝东杨少霞汤俊夏正龙刘艳红杨亚林徐远翔
Owner JIANGSU UNIV
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