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Pt-loaded Fe-doped alpha-phase nickel hydroxide nanosheet array material, and preparation method and application thereof

A nanosheet array, nickel salt technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problems of complex preparation methods and low HER catalytic activity, etc. To achieve the effect of simple preparation process, environmental friendliness, excellent catalytic activity and stability

Active Publication Date: 2019-12-17
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the preparation method of Pt-supported nanostructure catalyst is complicated, and the HER catalytic activity is low

Method used

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  • Pt-loaded Fe-doped alpha-phase nickel hydroxide nanosheet array material, and preparation method and application thereof
  • Pt-loaded Fe-doped alpha-phase nickel hydroxide nanosheet array material, and preparation method and application thereof
  • Pt-loaded Fe-doped alpha-phase nickel hydroxide nanosheet array material, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0043] A Pt-loaded Fe-doped α-Ni(OH) 2 A method for preparing a nanosheet array material, comprising the following steps:

[0044] Soak 2×3cm foam nickel in 6M hydrochloric acid solution for 15 minutes, wash foam nickel 3 times with deionized water and absolute ethanol respectively;

[0045] Accurately measure 35mL of anhydrous methanol into a 50mL clean small beaker, and then weigh 1mmol Ni(NO 3 ) 2 ·6H 2 O, 0.2mmol Fe(NO 3 ) 3 9H 2 O, 1mmol urea, add to a small beaker, then add 2mL of 0.05M sodium citrate solution, and finally add 0.4mL of 0.03M H 2 PtCl 6 solution, stirred and dissolved for 30 minutes to obtain a uniform solution;

[0046] Transfer the solution to a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, put clean nickel foam into the solution obliquely, seal it and react in an oven at 140°C for 8 hours. The nickel foam of the sample was washed three times with deionized water and absolute ethanol, and then the nickel foam was dried in ...

Embodiment 2

[0054] Pt-loaded Fe-doped α-Ni(OH) 2 A method for preparing a nanosheet array material, comprising the following steps:

[0055] Accurately measure 35mL of anhydrous methanol into a clean small beaker, and then weigh 1mmol of Ni(NO 3 ) 2 ·6H 2 O, 0.2mmol of Fe(NO 3 ) 3 9H 2 O, 1mmol of urea was dissolved in anhydrous methanol, then 2mL of 0.05M sodium citrate solution was added, and finally 0.2mL or 0.6mL of 0.03M H 2 PtCl 6 solution, stirred and dissolved for 30min to obtain a homogeneous solution.

[0056] Transfer the above solution to a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, put the pre-treated and clean foam nickel into the solution obliquely, seal it and react in an oven at 140°C for 8 hours, and naturally cool to room temperature after the reaction is completed , wash the nickel foam covering the sample three times with deionized water and absolute ethanol respectively, and then dry the nickel foam in a vacuum drying oven at 60°C for...

Embodiment 3

[0061] A Pt-loaded Fe-doped α-Ni(OH) 2Applications of nanosheet array materials as hydrogen evolution reaction (HER) catalysts.

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Abstract

The invention discloses a Pt-loaded Fe-doped alpha-phase nickel hydroxide nanosheet array material, and a preparation method and an application thereof. The preparation method comprises the steps: dissolving nickel salt, ferric salt, urea, a sodium citrate aqueous solution and a chloroplatinic acid aqueous solution into absolute methanol in sequence; transferring the solution into a reaction kettle; obliquely putting foamed nickel into the solution, carrying out a solvothermal reaction, and cooling to room temperature after the reaction is finished; and washing and drying the product, to obtain the nanosheet array material with Pt nanoparticles uniformly attached to an Fe-doped alpha-Ni(OH)2 nanosheet. Fe<3+> partially replaces Ni<2+> in alpha-Ni(OH)2 crystal lattices; a stronger metal carrier bonding site is provided for anchoring ultra-small Pt nanoparticles; strong contact (Fe<3+>-O(H)-Pt bonds) between the Pt nanoparticles and the Fe-doped alpha-Ni(OH)2 nanosheet carrier is beneficial to excellent catalytic activity and stability of the Fe-doped alpha-Ni(OH)2 nanosheet carrier; the Pt-loaded Fe-doped alpha-Ni(OH)2 nanosheet array material provided by the invention is used as ahydrogen evolution reaction electrocatalyst, and has the advantages of high catalytic activity, excellent stability and simple preparation process.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation method and electrocatalysis application, in particular to a Pt-loaded Fe-doped α-Ni(OH) 2 Nanosheet array materials, preparation methods and applications. Background technique [0002] Hydrogen is recognized as a clean energy because of its high energy density and environmental friendliness. Due to the advantages of easy availability of reactants, safe preparation, and stable output, electrocatalytic alkaline water electrolysis for hydrogen production is considered to be an effective strategy. Pt has a strong adsorption and recombination ability for the active intermediate H atoms, and is currently the most active electrocatalyst for the hydrogen evolution reaction (HER). However, the catalytic activity of Pt in alkaline electrolytes is about two orders of magnitude smaller than that in acidic media due to the slow step of water dissociation on the Pt surface in alkaline electrolytes. An...

Claims

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Application Information

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IPC IPC(8): B01J23/89C25B11/06C25B1/04
CPCB01J23/892C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 吴正翠杨曼玉
Owner ANHUI NORMAL UNIV