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Non-noble metal-based water-electrolysis oxygen evolution reaction electrocatalyst and preparation method thereof

An electrocatalyst and non-precious metal technology, which is applied in the field of non-precious metal-based electrocatalysts for water electrolysis and oxygen evolution reaction, can solve the problems of unstable activity of ultrafine nanoclusters, difficult chemical preparation process, loss of size advantages, etc. Excellent long-term stability, excellent stability, simple and easy preparation effect

Active Publication Date: 2018-10-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultrafine nanoclusters are extremely unstable due to their activity, and are very prone to agglomeration, thus losing their size advantage.
Therefore, it is generally difficult for ultrafine nanoclusters to exist alone, and its chemical preparation process is not easy to realize. At present, there are no reports on the synthesis of ultrafine nanoclusters of stable iron-based transition metal compounds at home and abroad.

Method used

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  • Non-noble metal-based water-electrolysis oxygen evolution reaction electrocatalyst and preparation method thereof
  • Non-noble metal-based water-electrolysis oxygen evolution reaction electrocatalyst and preparation method thereof
  • Non-noble metal-based water-electrolysis oxygen evolution reaction electrocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of FeOOH / LDH: 0.5 mmol nickel chloride hexahydrate, 10 mmol urea and 5 mmol were dissolved in 60 milliliters of deionized water; 100 milligrams of 316L stainless steel nanopowder was washed with water and ethanol and dried. Get 100 mg and add it to the above solution, ultrasonically disperse for 10 minutes (ultrasonic instrument is an ultrasonic cleaner KQ-100TDE) and mechanically stir for 10 minutes with a rotating speed of 100 rpm; the resulting suspension is transferred to 80 ml of Teflon Lining, placed in a stainless steel autoclave, heated at 120°C for 15 hours, and then cooled to room temperature; the obtained product was separated with a magnet and washed with deionized water, and the product that could not be adsorbed by the magnet was loaded highly dispersed iron oxyhydroxide Nanoclusters, repeated three times, were subsequently dried in a 60 °C drying oven.

Embodiment 2

[0039]Dissolve 0.5 mmol nickel chloride hexahydrate, 10 mmol urea and 5 mmol in 60 ml of deionized water; wash and dry the 316L stainless steel nanopowder with water and ethanol, add 10 mg to the above solution, and ultrasonically disperse 10 minutes (ultrasonic instrument is ultrasonic cleaning instrument KQ-100TDE) and with rotating speed is 100 revs per minute mechanical stirring 10 minutes; The suspension obtained is transferred in 80 milliliters of Teflon liners, puts into stainless steel autoclave, in Heated at 120°C for 15 hours, and then cooled to room temperature; the obtained product was separated by a magnet and washed with deionized water, and the product that could not be adsorbed by the magnet was a loaded highly dispersed iron oxyhydroxide nanocluster, repeated three times, and then heated at 60°C Dry in a drying oven.

Embodiment 3

[0041] Dissolve 0.5 mmol nickel chloride hexahydrate, 10 mmol urea and 5 mmol in 60 ml deionized water; wash and dry 316L stainless steel nanopowder with water and ethanol, add 300 mg to the above solution, and ultrasonically disperse 10 minutes (ultrasonic instrument is ultrasonic cleaning instrument KQ-100TDE) and with rotating speed is 100 revs per minute mechanical stirring 10 minutes; The suspension obtained is transferred in 80 milliliters of Teflon liners, puts into stainless steel autoclave, in Heated at 120°C for 15 hours, and then cooled to room temperature; the obtained product was separated by a magnet and washed with deionized water, and the product that could not be adsorbed by the magnet was a loaded highly dispersed iron oxyhydroxide nanocluster, repeated three times, and then heated at 60°C Dry in a drying oven.

[0042] Embodiment 4 The electrochemical performance test of the electrocatalyst prepared by embodiment 1-3

[0043] Catalyst ink was prepared by di...

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Abstract

The invention belongs to the field of electrochemistry catalytic materials, and particularly relates to a non-noble metal-based water-electrolysis oxygen evolution reaction electrocatalyst. The electrocatalyst is a ferronickel layered double-hydroxide oxide loaded with ferric oxyhydroxide nanoclusters. By means of the electrocatalyst, the problems that in the prior art, operation is complex, the steps are tedious and numerous, the catalytic activity is not high, and the energy conversion efficiency is not high are solved; through a solid ferric source slowly releasing ferric ions, a kinetic process of reaction is controlled, and a composite material loaded with the FeOOH nanoclusters is formed by the ferric ions and nickle ions dissolved in water together.

Description

technical field [0001] The invention belongs to the field of electrochemical catalytic materials, in particular to an electrocatalyst for oxygen evolution reaction in electrolyzed water based on non-noble metals. Background technique [0002] With the continuous consumption of fossil energy and the increasing environmental problems, traditional fossil energy can no longer fully meet the huge energy demand and the requirements of green development. Electrochemical water splitting for hydrogen production is widely regarded as a very promising technology for sustainable clean energy conversion and storage. However, the oxygen evolution reaction (OER) at the anode during electrochemical water splitting is a kinetically hysteretic process with a large oxygen evolution overpotential, which greatly limits the efficiency of water splitting. Currently, noble metal-based catalysts such as iridium oxide (IrO 2 ) and ruthenium oxide (RuO 2 ) have high electrochemical activity to acce...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/02C25B1/04C25B11/04
CPCC25B1/04C25B11/04B01J23/755B01J35/33B01J35/40Y02E60/36
Inventor 周尧陈健德李君涛孙世刚
Owner XIAMEN UNIV
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