Structure of ultrathin membrane electrode for SPE water electrolysis and preparation and application of structure

An ultra-thin film and water electrolysis technology, applied in battery electrodes, solid electrolyte fuel cells, electrodes, etc., can solve the problems of hydrazine toxicity, nanoporous gold film fragility, increase the difficulty of nanoporous gold surface modification, etc., and achieve high utilization rate High, improved dispersion and stability, the effect of low amount of precious metals

Active Publication Date: 2016-07-06
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

This patent uses nanoporous gold film as a self-supporting structure, but the nanoporous gold film is fragile during the preparation process, which increases the difficulty of surface modification of nanoporous gold film, making nanoporous gold film a functional material in engineering applications restricted
The hydrazine used in this patent is toxic

Method used

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  • Structure of ultrathin membrane electrode for SPE water electrolysis and preparation and application of structure
  • Structure of ultrathin membrane electrode for SPE water electrolysis and preparation and application of structure
  • Structure of ultrathin membrane electrode for SPE water electrolysis and preparation and application of structure

Examples

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Embodiment 1

[0035] With 12K gold leaf (Au 50 Ag 50wt.%) is the raw material, the gold foil is cut into a suitable size (2.1cm*2.1cm), the gold foil is spread on the surface of deionized water, and transferred to dilute nitric acid (the volume ratio of nitric acid and deionized water is 2:1), the reaction time was controlled to be 30min, and the prepared nanoporous gold was labeled as NPG(30). The nanoporous gold film (NPG, nanoporous goldfilm) obtained after dealloying is transferred to deionized water, and the nanoporous gold film is spread on the surface of deionized water at this time; replace deionization 3-4 times, remove the nanoporous gold film. nitric acid; the nanoporous gold film is transferred to a mica sheet (size 2.5cm × 4.0cm), and dried at room temperature; the Nafion211 film is covered on the side with the nanoporous gold film, and hot-pressed at 150°C and 5MPa 3min; carefully remove the mica sheet, and wash the obtained Nafion membrane with deionized water. The pore di...

Embodiment 2

[0039] Refer to Example 1 for the preparation and transfer process of the nanoporous gold film.

[0040] Pt and Ir were co-electrodeposited on the nanoporous gold film by constant potential electrodeposition. The specific operation method: construct a three-electrode system, connect the Nafion211 film with the nanoporous gold film and the wire as the working electrode, use the high-purity graphite plate as the counter electrode, and use the saturated calomel electrode as the reference electrode; before electroplating , place the working electrode in a fully deoxygenated 0.5MH 2 SO 4 Cyclic voltammetry (CV) was used in the solution to remove pollutants on the surface. The potential range of cyclic voltammetry was (0.0V, 1.7V) (vs.RHE), and the scan rate was 100mV / s for 30min; then the working electrode Switch to the electroplating solution, the composition of the electroplating solution: 0.4mMH 2 IrCl 6 , 0.5mMH 2 PtCl 6 , 0.5MH 2 SO 4 As a supporting electrolyte; the p...

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Abstract

The invention provides a structure of an ultrathin membrane electrode for SPE water electrolysis and a preparation method of the structure. The preparation method comprises the steps that firstly, a gold foil is adopted as a raw material, an dealloy method is adopted for obtaining a nano porous gold thin membrane, and then the thin membrane is transfer-printed to an ion exchange membrane; and the nano porous gold thin membrane is adopted as a supporting layer to carry a catalyst, and the ultrathin membrane electrode is manufactured. The manufactured membrane electrode has the beneficial effects of being small in catalyst carrying amount, high in utilization rate, easy to amplify and the like. The manufactured membrane electrode can be used for a water electrolysis pool, a regenerative fuel cell and other electrochemical reactors.

Description

technical field [0001] The invention relates to the field of solid polymer electrolyte (SPE) water electrolysis, in particular to a structure and a preparation method of an ultra-thin electrode for SPE water electrolysis. The prepared ultrathin electrodes can be used in water electrolysis cells and renewable fuel cells. Background technique [0002] With the continuous development of technology and economy, the demand for energy in human society continues to increase. A clean and efficient energy storage technology has become the appeal of all mankind. The deteriorating ecological environment forces people to increase research and development efforts. [0003] As a clean and efficient energy carrier, hydrogen has become the research focus of governments and research institutions around the world. Electrolytic lye hydrogen production technology was once the mainstream technology for large-scale hydrogen production. However, the electrolyte is prone to loss, and the asbest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/10C25B9/10H01M4/86H01M4/88H01M8/10C25B9/23
CPCY02E60/50Y02P70/50
Inventor 邵志刚曾亚超王浚英俞红梅郭晓倩衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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