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A carbon cloth-based zinc-controlled morphology cofep hydrogen evolution electrocatalyst, preparation method and application

An electrocatalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve problems such as unrealizable applications, achieve good shape plasticity and catalytic performance, increase specific surface area, and improve catalytic activity Effect

Active Publication Date: 2021-12-17
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The growth of transition metal phosphides on carbon cloth has been reported in the literature, among which CoFeP / carbon cloth has also received extensive attention. However, in the prior art, growth of transition metal phosphides on carbon steps cannot achieve control over the morphology of the product. , cannot achieve wider application

Method used

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  • A carbon cloth-based zinc-controlled morphology cofep hydrogen evolution electrocatalyst, preparation method and application
  • A carbon cloth-based zinc-controlled morphology cofep hydrogen evolution electrocatalyst, preparation method and application
  • A carbon cloth-based zinc-controlled morphology cofep hydrogen evolution electrocatalyst, preparation method and application

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Experimental program
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Embodiment 1

[0026] The preparation process of this embodiment is as follows:

[0027] (1) 9mmol cobalt nitrate hexahydrate and ferric nitrate nonahydrate were dissolved in 30ml deionized water and stirred for 10min, then 0.4686g zinc nitrate hexahydrate was added and stirred for 20min, the mol ratio of zinc nitrate hexahydrate and cobalt nitrate hexahydrate was 1: 4;

[0028] (2) Then add 60ml deionized water, 16mmol ammonium fluoride and 30mmol urea and stir for 30min until the solution is a transparent pink liquid;

[0029] (3) Put the carbon cloth into the lining of a 100ml reaction kettle first, then pour the obtained solution into the carbon cloth, let the solution cover the carbon cloth, and react at 120°C for 6 hours. After cooling to room temperature, take out the obtained sample, and then use alcohol and Washed with water for 3 times, freeze-dried to obtain the precursor;

[0030] (4) Heat the dried sample under nitrogen at 2°C / min to 350°C for 3h, then immerse the annealed sam...

Embodiment 2

[0033] In the present embodiment, the step (1) of embodiment 1 is:

[0034] Dissolve 9 mmol of cobalt nitrate hexahydrate and ferric nitrate nonahydrate in 30 ml of deionized water and stir for 10 min, then add 0.4686 g of zinc nitrate hexahydrate and stir for 20 min. The mol ratio of zinc nitrate hexahydrate and cobalt nitrate hexahydrate is 1:6, and other embodiments are identical with embodiment 1.

[0035] Finally, the rod-shaped CoFeP / carbon cloth electrocatalyst is obtained.

Embodiment 3

[0037] In this embodiment, the molar ratio of zinc nitrate hexahydrate and cobalt nitrate hexahydrate is 1:10, and other implementations are the same as in Example 1.

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Abstract

The invention discloses a zinc-controlled morphology CoFeP hydrogen evolution electrocatalyst based on carbon cloth, its preparation method and application. The invention obtains transition metal growth on carbon cloth through hydrothermal, annealing, alkali etching, phosphating and other schemes. Phosphide electrocatalysts. The control of the final sample morphology is achieved by adjusting the ratio of cobalt source and zinc source. Finally, CoFeP / carbon cloth electrocatalysts with sheet and rod shapes can be obtained. At the same time, under the test conditions of 1M potassium hydroxide solution, the current density in the linear sweep voltammetry curve reaches 10mA cm ‑2 The required overpotentials are 110mV and 115mV respectively. It can be concluded that the CoFeP / carbon cloth electrocatalyst has good shape plasticity and catalytic performance. The invention provides a new idea for preparing transition metal phosphide electrocatalysts with controllable morphology.

Description

technical field [0001] The invention relates to a hydrogen evolution reaction catalyst, in particular to a carbon cloth-based zinc-regulated morphology CoFeP hydrogen evolution electrocatalyst, a preparation method and an application. Background technique [0002] With the ever-increasing demand for energy and the severe environmental pollution caused by the burning of fossil fuels, the call for clean and sustainable energy is also growing. Hydrogen is considered to be an ideal fuel that can be used to replace fossil energy. It has remarkable characteristics such as high energy density and environmental friendliness, and has attracted widespread attention. At present, the most important technology used in industrial hydrogen production is steam reforming, but this technology requires high-energy heat input and a large amount of CO 2 The release of hydrogen is not a sustainable way of hydrogen production. Photo- and electrocatalytic water splitting is considered as a large-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J35/02C25B1/04C25B11/093C25B11/075
CPCB01J35/0033B01J27/1853B01J35/02C25B1/04C25B11/04Y02E60/36
Inventor 李洋刘俊唐然然蔡伦黄麒麟周文汉
Owner ANHUI UNIV OF SCI & TECH