A kind of silver/metal oxide porous material, its preparation method and application

A technology of porous materials and oxides, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of ORR activity gap and achieve low production cost, oxygen The effect of high catalytic activity and easy implementation of reduction reaction

Active Publication Date: 2018-01-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Linic et al. (Nature Chem.6(2014) 828) proved by quantum chemical calculation that the formation of AgCo into an alloy can improve the ORR activity, and prepared an AgCo electrocatalyst with an alloy surface, which has a greater ORR activity than silver, but its ORR There is still a certain gap in activity compared with Pt / C catalyst

Method used

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  • A kind of silver/metal oxide porous material, its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: configuration contains the solution of 0.005M NaCl and 0.1M NaOH and it is used as electrolytic solution, and the silver lump electrode that diameter is 5mm is as working electrode, and platinum sheet is counter electrode, and mercury / mercuric oxide electrode is reference electrode, Electrochemical treatment at 1.0V (relative to the reversible hydrogen electrode) for 2h followed by electrochemical reduction in 0.1M NaOH electrolyte at 0.15V (relative to the reversible hydrogen electrode) for 5min to obtain porous silver. Prepare a solution containing 50mM manganese nitrate and use it as an electrolyte, porous silver as a working electrode, a platinum sheet as a counter electrode, and a silver / silver chloride electrode as a reference electrode for electrochemical deposition to obtain MnO X / Ag sample.

Embodiment 2

[0025] Embodiment 2: configuration contains the solution of 0.001mM NaCl and it is used as electrolyte, with silver sheet as working electrode, graphite rod is counter electrode, and silver / silver chloride electrode is reference electrode, at 1.5V (relative to reversible hydrogen electrode) under electrochemical treatment for 100 h, and then irradiated under strong light of 200,000 lux for 1 h to obtain porous silver. Prepare a solution containing 50mM copper nitrate and use it as an electrolyte, porous silver as a working electrode, a platinum sheet as a counter electrode, and a silver / silver chloride electrode as a reference electrode for electrochemical deposition to obtain CuO X / Ag sample.

Embodiment 3

[0026] Embodiment 3: configure the solution containing 2M NaCl and 0.1M HCl and use it as electrolyte, use silver rod as working electrode, silver sheet as counter electrode, saturated calomel electrode as reference electrode, electrochemical treatment at 5.0V After 360s, copper target X-rays were irradiated for 1h to obtain porous silver. Prepare a solution containing 50mM ferric nitrate and use it as an electrolyte, porous silver as a working electrode, a platinum sheet as a counter electrode, and a silver / silver chloride electrode as a reference electrode for electrochemical deposition to obtain FeO X / Ag sample.

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Abstract

The present invention relates to a silver / metal oxide porous material, its preparation method and application. The method specifically refers to a method for depositing oxides by electrochemical means on the surface of a silver substrate in an electrolyte solution containing a certain precursor salt. The method has the advantages of simplicity, environmental protection and easy implementation. The material has high catalytic activity when applied to oxygen reduction reaction. Compared with the prior art, the method for electrodepositing metal oxides on hierarchical porous silver of the present invention has the advantages of environmental protection, simplicity, ease of implementation, and low production cost; and the material has the advantages of high catalytic activity when applied to oxygen reduction reaction.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, and in particular relates to a silver / metal oxide porous material and its preparation method and application. Background technique [0002] Fuel cell is an environmentally friendly energy technology because of its advantages of high energy density and no pollution, it has become a research hotspot in the world. Metal-air batteries (magnesium-air batteries, zinc-air batteries) are rich in fuel supply, easy to carry, and non-precious metal oxygen reduction catalysts can be used for oxygen electrodes; and alkaline anion exchange membrane fuel cells, compared with proton exchange membrane fuel cells, are not There is a problem of electrode potential drop due to fuel permeation, and non-Pt oxygen reduction catalysts can also be used, which has attracted extensive attention. [0003] In recent years, silver has attracted extensive attention from researchers due to its high activity an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68B01J23/89B01J23/66B01J35/10B01J37/34H01M4/90
CPCY02E60/50
Inventor 孙公权袁丽只姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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