Ag-CuO/C catalyst and preparation and applications thereof

A catalyst, ag-cuo technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as ORR activity gap

Active Publication Date: 2017-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • 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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  • Ag-CuO/C catalyst and preparation and applications thereof
  • Ag-CuO/C catalyst and preparation and applications thereof
  • Ag-CuO/C catalyst and preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the AgCuO of 5mg 2 Ultrasonic dispersion in 6mL of ethanol, then adding 5 mg of VulcanXC-72R to it for ultrasonic dispersion, and finally adding 20 μL of 5wt.% nafion solution to obtain a catalyst precursor slurry after uniform dispersion. The catalyst slurry was drop-coated on a glassy carbon electrode, and it was scanned by cyclic voltammetry at 0.12V-1.2V (relative to the potential of the reversible hydrogen electrode) until the scanning curve was stable, and the loading of Ag was 27.62%, and the loading of CuO was 27.62%. Ag / CuO / C catalyst in an amount of 20.35%.

Embodiment 2

[0028] Embodiment 2: the Ag of 5mg 2 Cu 2 o 3 Ultrasonic dispersion in 6mL of ethanol, then adding 5 mg of VulcanXC-72R to it for ultrasonic dispersion, and finally adding 20 μL of 5wt.% nafion solution to obtain a catalyst precursor slurry after uniform dispersion. The catalyst slurry was drop-coated on a glassy carbon electrode, and it was scanned by cyclic voltammetry at 0.12V-1.2V (relative to the potential of the reversible hydrogen electrode) until the scanning curve was stable, and the loading of Ag was 28.19%, and the loading of CuO was 28.19%. Ag / CuO / C catalyst in an amount of 20.74%.

Embodiment 3

[0029] Embodiment 3: the AgCuO of 0.5mg 2 Ultrasonic dispersion in 6mL of ethanol, then 9.5mg of BlackPearls-2000 was added to it for ultrasonic dispersion, and finally 20 μL of 5wt.% PTFE solution was added to obtain a catalyst precursor slurry after uniform dispersion. The catalyst slurry was drop-coated on conductive glass, and it was scanned at -0.3V (relative to the reversible hydrogen electrode potential) until the scanning curve was stable, and the loading of Ag was 2.66%, and the loading of CuO was 1.96%. Ag / CuO / C catalyst.

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Abstract

The invention belongs to the technical fields of catalyst and catalyst preparation, and specifically relates to an Ag/CuO/C oxygen reduction electro-catalyst, which is applied to a metal-air fuel cell, an alkaline anion-exchange membrane fuel cell, and other alkaline conditions, and preparation and applications thereof. During the preparation process of the catalyst, no toxic substance is used; the preparation is safe and pollution-free, and the environment is protected. The application range of the catalyst is wide. The catalyst can be used as an oxygen reduction catalyst in a metal-air fuel cell, an alkaline anion-exchange membrane fuel cell, and other alkaline conditions.

Description

Contents of the invention [0001] The invention belongs to the technical field of catalysts and their preparation, and in particular relates to an oxygen reduction catalyst used in metal-air fuel cells, alkaline anion-exchange membrane fuel cells and other alkaline conditions, as well as its preparation and application. Background technique [0002] Fuel cell is an environmentally friendly energy technology because of its advantages of high energy density, no pollution, no noise, etc., it has become a research hotspot in the world. Metal-air batteries have rich fuel supply, long storage life, and are easy to carry. The oxygen electrode can use non-precious metal oxygen reduction catalysts; and the alkaline anion exchange membrane fuel cell, compared with the proton exchange membrane fuel cell, does not have electrode leakage due to fuel penetration. Potential drop problem, also can use non-Pt oxygen reduction catalyst. [0003] Due to its high activity and stability in alkal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/90H01M4/9016H01M4/9041H01M4/9083Y02E60/50
Inventor 孙公权袁丽只姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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