FeCoNiBOx/PPy/rGO nanomaterial, and OER electrocatalytic modified electrode based thereon

A nanomaterial and electrode modification technology, applied in the field of electrochemical catalysis, can solve the problems of scarcity, high price, poor stability, etc., and achieve the effects of fast reaction speed, low price and good stability

Active Publication Date: 2019-10-22
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its scarcity, high price and poor stability have greatly limited its large-scale application.

Method used

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  • FeCoNiBOx/PPy/rGO nanomaterial, and OER electrocatalytic modified electrode based thereon
  • FeCoNiBOx/PPy/rGO nanomaterial, and OER electrocatalytic modified electrode based thereon
  • FeCoNiBOx/PPy/rGO nanomaterial, and OER electrocatalytic modified electrode based thereon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 FeCoNiBO x / PPy / rGO nanomaterials

[0035] (1) The preparation method is as follows:

[0036] 1) Preparation of GO nanosheets: Add 67.5mL of concentrated sulfuric acid, 2.0g of high-purity graphite and 1.6g of NaNO into a three-neck flask 3 , and stir evenly, keep the system temperature below 5°C, add 9g KMnO to the mixed solution within one hour 4 , and then placed in a 36°C water bath for 0.5h. After standing at room temperature for two weeks, dilute with 560 mL of 60°C water, add H 2 o 2 Until the solution turns bright yellow, centrifuge (rmp=10000) while it is hot, wash to neutrality, and vacuum-dry at 50° C. to obtain GO nanosheets.

[0037] 2) PPy / GO nanosheets: Add 0.2g GO nanosheets to 100mL deionized water for ultrasonic dispersion, then add 0.2g pyrrole (Py), add 0.6g FeCl after ultrasonic dispersion 3 ·6H 2 O, continue to sonicate for 0.5h, centrifuge, wash and dry in vacuum to obtain PPy / GO nanosheets.

[0038] 3) FeCoNiBO x Preparation of...

Embodiment 2

[0044] Example 2 Based on FeCoNiBO x OER Electrocatalytic Modification Electrode of / PPy / rGO Nanomaterials

[0045] (1) The preparation method is as follows:

[0046] 1) get the dry FeCoNiBO prepared by 2mg embodiment 1 x / PPy / rGO nanomaterials, add 1mL of ethanol, ultrasonically disperse for 20min, and obtain a black suspension with a concentration of 2mg / mL, which is the composite modifier, and set aside.

[0047] 2) Electrode treatment: the glassy carbon electrode was first polished with 0.3 μM aluminum oxide suspension on a polishing cloth, then ultrasonically cleaned with deionized water, and then 0.05 μM aluminum oxide suspension Polish it to a mirror surface on a polishing cloth, and finally clean it ultrasonically with ethanol and deionized water, dry it with high-purity argon, and set it aside.

[0048] 3) Preparation of modified electrode: Use a microsampler to pipette 5 μL of the composite modifier prepared in step 1) and drop-coat it on the surface of a polished...

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PUM

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Abstract

The invention relates to a FeCoNiBOx / PPy / rGO nanomaterial, and an OER electrocatalytic modified electrode based thereon. An electrode comprises a FeCoNiBOx-modified polypyrrole / reduced graphene oxide(PPy / rGO) nanosheet that is the FeCoNiBOx / PPy / rGO nanomaterial, and the oxygen evolution reaction (OER) electrocatalytic modified electrode based thereon. The electrode comprises a glassy carbon electrode as a base electrode and the FeCoNiBOx / PPy / rGO nanosheet adhered to the glassy carbon electrode. FeCoNiBOx used as the catalytic center and a PPy / rGO nanosheet used as a substrate material can promote the electron transport of OER, so the reaction rate of water decomposition is improved, and the overpotential is low, thereby the nanomaterial-modified electrode has a high electrochemical activity and a good stability in the in water decomposition field.

Description

technical field [0001] The invention belongs to the field of electrochemical catalysis, and in particular relates to an electrocatalytic modified electrode and its preparation method and application. Background technique [0002] Based on the high specific energy content and carbon-neutral combustion products of hydrogen, it has long been considered as an alternative fuel to replace fossil fuels and meet global energy consumption. Two half-reactions for environmentally friendly hydrogen production powered by renewable energy have been widely explored. [0003] Hydrogen production by electrolysis of water can be said to be rich in raw materials, simple in method, and hydrogen has a very wide range of applications. The oxygen evolution reaction (OER), a multi-step, four-electron process, is limited by its slow kinetics compared with the hydrogen evolution reaction (HER). The key to water electrolysis is to increase the OER activity by adding catalysts. Conventional Ir / Ru-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04B82Y40/00B82Y30/00B01J23/755
CPCC25B1/04B82Y40/00B82Y30/00B01J23/755C25B11/051C25B11/095B01J35/33Y02E60/36
Inventor 茆卉郭玺傅源琳宋溪明
Owner LIAONING UNIVERSITY
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