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Ni-Fe MMO film modified foam nickel catalyst and preparation method and application thereof

A foamed nickel and catalyst technology, which is applied to a Ni-Fe MMO film-modified foamed nickel catalyst and its preparation and application fields, can solve the problems of low activity and the like, and achieve the effects of simple preparation process, good stability and convenient operation.

Pending Publication Date: 2022-07-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with noble metal catalysts, NiO is generally less active, especially in terms of its overpotential

Method used

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  • Ni-Fe MMO film modified foam nickel catalyst and preparation method and application thereof
  • Ni-Fe MMO film modified foam nickel catalyst and preparation method and application thereof
  • Ni-Fe MMO film modified foam nickel catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a nickel foam catalyst modified by a Ni-Fe MMO film, comprising the following steps:

[0032] 1) Weigh 20mmol FeCl 3 ·6H 2 O, 20 mmol NiCl 2 ·6H 2 O and 400 mmol NH 4 The Cl powder was dissolved in 200 mL of deionized water to obtain an electroplating solution;

[0033] 2) Use a 1cm*1cm platinum sheet electrode as the anode and 1cm*1cm commercial nickel foam as the cathode, connect the galvanostat and then immerse it in the electroplating solution obtained in step 1). Nickel foam for Fe MMO films;

[0034] 3) The nickel foam with the modified Ni-Fe MMO film obtained in 2) was placed in a 50% ethanol-water mixed solution for 30 min, and the residual plating solution was removed and dried at room temperature in an air environment to obtain a modified Ni-Fe MMO film. foam nickel catalyst.

Embodiment 2

[0036] A preparation method of a Ni-Fe MMO film-modified foamed nickel catalyst, the preparation method repeats Example 1, the difference is only that in step 1) in the ratio of the electroplating solution, it is changed to 10mmol FeCl 3 ·6H 2 O, 30 mmol NiCl 2 ·6H 2 O and 400 mmol NH 4 Cl powder, dissolved in 200 mL of deionized water.

Embodiment 3

[0038] A preparation method of a Ni-Fe MMO film-modified foamed nickel catalyst, the preparation method repeats Example 1, the difference is only in step 1) in the ratio of the electroplating solution, changed to 30mmol FeCl 3 ·6H 2 O, 10 mmol NiCl 2 ·6H 2 O and 400 mmol NH 4 Cl powder, dissolved in 200 mL of deionized water.

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Abstract

The invention discloses a Ni-Fe MMO film modified foamed nickel catalyst and a preparation method and application thereof, the catalyst is composed of a carrier and an active component loaded on the carrier, the carrier is commercial foamed nickel, and the active component is a Ni-Fe MMO film. The preparation process of the catalyst is carried out in a two-electrode working system, a platinum sheet electrode is used as a counter electrode, commercial foamed nickel is used as a working electrode, and a mixed aqueous solution containing ferric salt, nickel salt and ammonium salt is used as an electroplating solution to carry out electrolytic reaction, so that a layer of Ni-Fe MMO film is electrodeposited on the commercial foamed nickel, and the catalyst is obtained. The finally prepared catalyst can be well used for preparing a cathode of a hydrogen peroxide reaction module through oxygen reduction. The catalyst disclosed by the invention is simple in preparation process flow, low in metal loading capacity and low in cost, has good performance and stability of producing hydrogen peroxide through oxygen reduction, and has huge application potential.

Description

technical field [0001] The invention relates to a foamed nickel catalyst modified by a Ni-Fe MMO film and a preparation method and application thereof. Background technique [0002] H 2 O 2 It is an important chemical substance widely used as oxidant and disinfectant in human society. H 2 O 2 The industrial synthesis of the anthraquinone method (that is, the AO process) requires the participation of toxic organic compounds and is not an environmentally friendly synthesis method. In various applications, diluted H 2 O 2 solution is sufficient, which makes many other H 2 O 2 Synthetic methods emerged as candidates to replace the AO process. For example, chemical synthesis, medical sterilization, pulp bleaching and cosmetic applications only require H concentrations below 9 wt% 2 O 2 . For wastewater treatment, only H concentration <0.1 wt% is required 2 O 2 . [0003] The decentralization needs of users and the disadvantages of the AO process have stimulated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/052C25B11/031C25B1/30C25D9/04C25D9/08
CPCC25B11/091C25B11/052C25B11/031C25B1/30C25D9/04C25D9/08
Inventor 赵芷琪王建国应惠娟钟兴孔家伦王国梁
Owner ZHEJIANG UNIV OF TECH
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