Composite catalyst with NiTe and NiFe loaded on foamed nickel as well as preparation method and application of composite catalyst

A composite catalyst, nickel foam technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as poor intrinsic conductivity, limited OER performance, active site exposure, etc., to improve catalytic activity and improve intrinsic conductivity. The effect of poor oxygen evolution rate and optimization of oxygen evolution performance

Pending Publication Date: 2021-07-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] NiFe double metal hydroxide has the advantages of abundant reserves, low cost, high catalytic activity and easy preparation, but its active site exposure and poor intrinsic conductivity limit its OER performance.

Method used

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  • Composite catalyst with NiTe and NiFe loaded on foamed nickel as well as preparation method and application of composite catalyst
  • Composite catalyst with NiTe and NiFe loaded on foamed nickel as well as preparation method and application of composite catalyst
  • Composite catalyst with NiTe and NiFe loaded on foamed nickel as well as preparation method and application of composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The nickel foam was ultrasonically cleaned with hydrochloric acid and acetone, respectively, and dried in vacuum; 2 TeO 3 Soluble in water, making water and Na 2 TeO 3 The molar ratio is 400:1, stir evenly at room temperature, then add N 2 h 4 ·H 2 O and control N 2 h 4 ·H 2 O and Na 2 TeO 3 The molar ratio is 0.5:1, and after stirring for 5 min, it is transferred to a polytetrafluoroethylene reactor together with foamed nickel, wherein the molar ratio of foamed nickel to the compound containing tellurium is 10:1, followed by hydrothermal reaction After 24 hours, it was naturally cooled and washed, and kept in a vacuum oven at 60°C for 12 hours to obtain NiTe-loaded nickel foam (NiTe / NF).

[0033] 3 mmol FeSO 4 ·7H 2 O and 3 mmol Ni(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL water, NiTe / NF was used as the working electrode, and the deposition time was 900 s. The obtained product was washed and dried in vacuum to obtain the NiTe@NiFe-900 / NF composite catalys...

Embodiment 2

[0039] The nickel foam was ultrasonically cleaned with hydrochloric acid and acetone, dried in vacuum, and Na 2 TeO 3 Soluble in water, making water and Na 2 TeO 3 The molar ratio is 500:1, stir evenly at room temperature, then add N 2 h 4 ·H 2 O and control N 2 h 4 ·H 2 O and Na 2 TeO 3 The molar ratio is 1:1, and after stirring for 5 min, it is transferred to a polytetrafluoroethylene reactor together with foamed nickel, wherein the molar ratio of foamed nickel to the compound containing tellurium is 20:1, followed by hydrothermal reaction After natural cooling for 36 h, it was washed several times with deionized water and absolute ethanol, and kept in a vacuum oven at 60 °C for 12 h to obtain NiTe-loaded nickel foam (NiTe / NF).

[0040] 3mmol Fe(NO 3 ) 3 9H 2 O and 3 mmol Ni(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL of water, NiTe / NF was used as the working electrode, and the deposition time was 700 s. The obtained product was washed and dried in vacuum to obt...

Embodiment 3

[0042] The nickel foam was ultrasonically cleaned with hydrochloric acid and acetone, dried in vacuum, and Na 2 TeO 3 Soluble in water, making water and Na 2 TeO 3 The molar ratio is 600:1, stir well at room temperature, then add N 2 h 4 ·H 2 O and control N 2 h 4 ·H 2 O and Na 2 TeO 3 The molar ratio is 1.5:1. After stirring for 5 min, it is transferred to a polytetrafluoroethylene reactor together with nickel foam. After natural cooling for 12 h, it was washed several times with deionized water and absolute ethanol, and kept in a vacuum oven at 60 °C for 12 h to obtain NiTe-loaded nickel foam (NiTe / NF).

[0043] 3 mmol FeSO 4 ·7H 2 O and 3 mmol Ni(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL of water, NiTe / NF was used as the working electrode, and the deposition time was 1100 s. The obtained product was washed and dried in vacuum to obtain the NiTe@NiFe-1100 / NF composite catalyst.

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Abstract

The invention provides a composite catalyst with NiTe and NiFe loaded on foamed nickel as well as a preparation method and application of the composite catalyst, and belongs to the technical field of preparation of composite materials. The preparation method comprises the following steps: firstly, loading NiTe on foamed nickel to obtain a catalyst NiTe / NF, then taking the catalyst NiTe / NF as a working electrode, and taking a solution containing ferric salt and nickel salt as an electroplating solution to prepare a composite catalyst with NiTe@NiFe loaded on the foamed nickel, and recording the composite catalyst as the NiTe@NiFe / NF composite catalyst, wherein the NiTe@NiFe / NF composite catalyst shows an excellent electro-catalytic property on an oxygen evolution half reaction of water decomposition.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a composite catalyst loaded with NiTe@NiFe on foamed nickel, a preparation method and application thereof. Background technique [0002] In the electrohydrogen production reaction process, the water on the cathode side is reduced to produce hydrogen, and the water on the anode side is oxidized to produce oxygen. The oxygen evolution reaction at the anode is a multi-step four-electron process. Compared with the hydrogen evolution reaction at the cathode, the kinetics of the oxygen evolution reaction is slow and difficult, which restricts the rate of hydrogen production by electrolysis. Therefore, it is necessary to develop an effective oxygen evolution catalyst to reduce its reaction potential. [0003] Noble metal-based (Ru / Ir, etc.) materials have good oxygen evolution reaction (OER) activity, but their low reserves and high price limit their l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/091C25B11/061C25B11/053
CPCC25B1/04Y02E60/36
Inventor 徐卫糜建立
Owner JIANGSU UNIV
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