Method for preparing electrocatalytic water-splitting oxygen production electrode

An electrocatalysis and electrode technology, which is applied in the field of preparation of electrocatalytic water splitting oxygen production electrodes, can solve the problems of no electrocatalytic activity, MOFs membrane can not be applied to the field of electrocatalysis, etc., and achieve low raw material cost, low overpotential, high active effect

Active Publication Date: 2016-03-02
理工清科(北京)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on the existing electrochemical deposition MOFs film technology, only MOFs films with a single metal component and no electrocatalytic activity can be obtained, so the prepared MOFs films cannot be used in the field of electrocatalysis

Method used

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  • Method for preparing electrocatalytic water-splitting oxygen production electrode
  • Method for preparing electrocatalytic water-splitting oxygen production electrode
  • Method for preparing electrocatalytic water-splitting oxygen production electrode

Examples

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preparation example Construction

[0029] Preparation of Fe / Ni-BTC powder samples: From the prepared Fe / Ni-BTC electrocatalytic water-splitting oxygen production electrode, carefully scrape the Fe / Ni-BTC powder with a scraper. The foamed nickel was scraped off, and the obtained powder was collected with filter paper for subsequent use;

[0030] Reagents used in the examples of Table 1

[0031]

[0032] Instruments used in the embodiment of table 2

[0033]

[0034] Linear voltammetry test: the prepared electrocatalytic water splitting oxygen production electrode was used as the working electrode, the silver / silver chloride saturated electrode was used as the reference electrode, the platinum sheet was used as the counter electrode, and the KOH solution of 0.1 mol / L was used as the reference electrode. Electrolyte, use the linear voltammetry scanning test mode of the electrochemical workstation, set the potential window to 0~0.8V, the scanning speed is 2mV / s, and apply 95% iR compensation to test;

[003...

Embodiment 1

[0039] (1) Preparation of electrolyte: 0.6543g Ni (NO 3 ) 2 ·6H 2 O, 0.1010g Fe (NO 3 ) 3 ·9H 2O and 1.0507g of trimesic acid were dissolved in 50mL of N,N-dimethylformamide, and then 1.5574g of methyltributylammonium sulfate was added as the supporting electrolyte, and after fully stirring until completely dissolved, the Fe / Ni bilayer was obtained. Electrolyte of metal-organic framework material (Fe / Ni-BTC) coordinated by metal and trimesic acid;

[0040] (2) Assembling a standard three-electrode system: take the nickel foam as the working electrode, take the silver / silver chloride saturated electrode as the reference electrode, take the platinum sheet as the counter electrode, and take the solution prepared in step (1) as the electrolyte, Assembled into a standard three-electrode system;

[0041] (3) Preparation of oxygen-producing electrode: connect the standard three-electrode system in step (2) to an electrochemical workstation, carry out potentiostatic electrodepos...

Embodiment 2

[0045] (1) Preparation of electrolyte: 0.3272g Ni (NO 3 ) 2 ·6H 2 O, 0.0505g Fe (NO 3 ) 3 ·9H 2 O and 0.5254g of trimesic acid were dissolved in 25mL of N,N-dimethylformamide, and 0.7787g of methyltributylammonium sulfate was added as the supporting electrolyte. After fully stirring, the Fe / Ni bilayer was obtained. Electrolyte of metal-organic framework material (Fe / Ni-BTC) coordinated by metal and trimesic acid;

[0046] (2) Assembling a standard three-electrode system: take the nickel foam as the working electrode, take the silver / silver chloride saturated electrode as the reference electrode, take the platinum sheet as the counter electrode, and take the solution prepared in step (1) as the electrolyte, Assembled into a standard three-electrode system;

[0047] (3) Preparation of oxygen-producing electrode: connect the standard three-electrode system in step (2) to an electrochemical workstation, carry out potentiostatic electrodeposition at -1.0V, and after depositio...

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Abstract

The invention particularly relates to a method for preparing an electrocatalytic water-splitting oxygen production electrode, with Fe / Ni duplex metal coordinating with trimesic acid, of a metal organic framework material and belongs to the field of electrodeposition / electrocatalysis. The method comprises the steps that (1) Ni(NO3)2.6H2O, Fe(NO3)3.9H2O and the trimesic acid are all dissolved in N,N-dimethylformamide, then tributylmethylammonium methyl sulfate is added, and sufficient stirring is conduced till all the components are completely dissolved, so that electrolyte, with the Fe / Ni duplex metal coordinating with the trimesic acid, for the metal organic framework material is obtained; (2) a standard three-electrode system is assembled by using foamed nickel as a working electrode, a silver / silver chloride saturated electrode as a reference electrode, a platinum sheet as a counter electrode and the solution prepared in the step (1) as the electrolyte; and (3) the standard three-electrode system assembled in the step (2) is connected to an electrochemical workstation, and the working electrode is taken out of the electrolyte, cleaned and dried after constant-potential electrodeposition is conducted, so that the electrocatalytic water-splitting oxygen production electrode is obtained.

Description

technical field [0001] The invention relates to a preparation method of an electrocatalytic water splitting oxygen-producing electrode, in particular to a metal-organic framework material (MOFs) coordinated by Fe / Ni bimetal and trimesic acid. The preparation method belongs to the field of electrodeposition / electrocatalysis. Background technique [0002] The sustainable development of modern society requires stable and continuous clean energy conversion and storage devices, such as solar water splitting devices, metal-air batteries and fuel cells. However, the efficiency of these devices is invariably limited by an important reaction, the oxygen production reaction. As the source of protons and electrons in the system, the reaction will transfer four electrons and four protons. The reaction is slow, low in efficiency, and high in energy consumption, which greatly restricts the efficiency of related devices. The core of breaking through the efficiency of the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25B1/04C25B11/06C25B11/03H01M4/88H01M12/06
CPCC25B1/04C25D3/56C25B11/031C25B11/095H01M4/8853H01M12/06Y02E60/36
Inventor 王博王璐
Owner 理工清科(北京)科技有限公司
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