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Foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array as well as preparation method and application thereof

A nano-array, nickel foam technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of low catalytic activity, long-term corrosion resistance, unsatisfactory electrocatalytic performance and practical industrial application, etc., and achieve catalytic activity. High, improve the intrinsic catalytic activity, optimize the effect of Gibbs free energy

Inactive Publication Date: 2021-07-20
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, their long-term corrosion resistance, electrocatalytic performance, and practical industrial applications are often unsatisfactory
It is disclosed in the prior art that the conductivity of TMPs catalysts is improved by introducing the noble element ruthenium, but there is still the problem of low catalytic activity.

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  • Foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array as well as preparation method and application thereof
  • Foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array as well as preparation method and application thereof
  • Foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array as well as preparation method and application thereof

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preparation example Construction

[0031] The present invention provides a kind of preparation method of nickel-cobalt bimetallic phosphide nano-array (Er-NiCoP / NF) doped with foam nickel-based erbium, comprising the following steps:

[0032] Mixing soluble trivalent erbium salt, soluble divalent nickel salt, soluble divalent cobalt salt, urea, ammonium fluoride and water to obtain a mixed solution;

[0033] Soaking the nickel foam with the mixed solution and then performing a hydrothermal reaction to obtain a hydrothermal product;

[0034] The phosphorus source and the hydrothermal product are calcined in a protective atmosphere to obtain the nickel-cobalt double-metal phosphide nano-array doped with nickel-based erbium foam.

[0035] In the present invention, the source of each raw material is not particularly limited, and commercially available products well known to those skilled in the art can be used.

[0036] The invention mixes soluble trivalent erbium salt, soluble divalent nickel salt, soluble divale...

Embodiment 1

[0062] 1mmol Ni(NO 3 ) 2 ·6H 2 O, 1mmol Co(NO 3 ) 2 ·6H 2 O, urea (6mmol) and NH 4 F (2.5 mmol) was dissolved in 30 mL of water, and after stirring for 30 minutes, it was aged at room temperature for 1 hour. The solution was then transferred to a 50 mL stainless steel autoclave lined with Teflon, and a piece of nickel foam (area 6 cm 2 , with a thickness of 1.5mm and a surface density of 350g·cm -2 ) was immersed in the reaction solution and kept at 120° C. for 6 hours. When the temperature was cooled to room temperature, the obtained NiCo nanowire array precursor (NiCo NWAs precursor / NF) was washed once with water and ethanol, and dried overnight at 60 °C in a vacuum drying oven.

[0063] NaH 2 PO 2 ·H 2 O (500 mg) and pre-prepared NiCo NWAs precursor / NF were placed on the upstream side and center of the tube furnace, respectively. The sample was then calcined at 350 °C for 2 h in an Ar atmosphere with a heating rate of 2 °C min -1 . Finally, NiCoP / NF was obtain...

Embodiment 2

[0065] 1mmol Ni(NO 3 ) 2 ·6H 2 O, 1mmol Co(NO 3 ) 2 ·6H 2 O, 0.05mmol Er(NO 3 ) 3 ·6H 2 O (molar ratio Er:Ni=5%), urea (6mmol) and NH 4 F (2.5 mmol) was dissolved in 30 mL of water, and after stirring for 30 minutes, it was aged at room temperature for 1 hour. The solution was then transferred to a 50 mL stainless steel autoclave lined with Teflon, and a piece of nickel foam (area 6 cm 2 , with a thickness of 1.5mm and a surface density of 350g·cm -2 ) into the reaction solution and kept at 100°C for 10 hours. When the temperature was cooled to room temperature, the obtained Er-doped NiCo nanowire array precursor (Er-NiCo NWAs precursor / NF) was washed several times with water and ethanol, and dried overnight at 60 °C in a vacuum oven.

[0066] NaH 2 PO 2 ·H 2 O (500 mg) and pre-prepared Er-NiCo NWAs precursor / NF were placed on the upstream side and center of the tube furnace, respectively. The sample was then calcined at 300 °C for 3 h in an Ar atmosphere with a...

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Abstract

The invention provides a foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array as well as a preparation method and application thereof, and belongs to the technical field of functional materials and electro-catalytic water decomposition. The preparation method comprises the following steps: mixing soluble trivalent erbium salt, soluble divalent nickel salt, soluble divalent cobalt salt, urea, ammonium fluoride and water to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution and foamed nickel to obtain a hydrothermal product; and calcining a phosphorus source and the hydrothermal product in a protective atmosphere to obtain the foamed nickel-based erbium-doped nickel-cobalt bimetallic phosphide nano array. Introduction of rare earth element erbium is a promising strategy and can be used for regulating and controlling the microstructure and the electronic structure of the catalyst, so that electrocatalytic reaction kinetics is accelerated.

Description

technical field [0001] The invention relates to the technical field of functionalized materials and electrocatalytic water splitting, in particular to a nickel-cobalt double-metal phosphide nano-array doped with foamed nickel-based erbium and its preparation method and application. Background technique [0002] Electrochemical water splitting is an attractive, low-cost carbon-neutral hydrogen production technology. However, the slow kinetics and high energy consumption of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been a difficult and challenging task for water splitting. In order to explore high performance and high stability bifunctional As electrocatalysts, and to replace noble metal-based catalysts (Pt-based and Ir- / Ru-based oxides), it is necessary to construct highly active, cost-effective non-noble metal bifunctional electrocatalysts. [0003] Transition metal phosphides (TMPs) are promising non-noble metal bifunctional electrocatalyst...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04C25B11/031C25B11/052
CPCC25B1/04Y02E60/36
Inventor 胡广志张华陈安然贾秀秀
Owner YUNNAN UNIV
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