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Bimetallic phosphide hydrogen evolution catalyst and preparation method

A phosphide and catalyst technology, which is applied in the field of double metal phosphide hydrogen evolution catalyst and preparation, can solve the problems of poor stability of metal phosphide, unfavorable phosphide application, high equipment requirements, etc., achieve low raw material cost and reduce environmental hazards , The effect of the simple preparation method

Inactive Publication Date: 2017-05-24
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently prepared metal phosphides are not stable in the hydrogen evolution process.
In addition, sodium hypophosphite is often used as an inorganic phosphorus source in the production process of metal phosphides. After heating sodium hypophosphite, it is easy to produce toxic gases such as phosphine, which is harmful to the environment. Moreover, sodium hypophosphite has strong reducibility and requires extremely high equipment. Not conducive to the further application of phosphide

Method used

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  • Bimetallic phosphide hydrogen evolution catalyst and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.43g CoCl 2 Place in 40mL absolute ethanol, stir at room temperature until the metal salt dissolves into a homogeneous solution A; weigh 5.62g triphenylphosphine oxide (OPPh 3 ) in 60mL of absolute ethanol, stirred at room temperature until dissolved to form a colorless and clear solution B; slowly drop solution A into solution B, and continuously stirred for 2h to obtain a precipitate, which was washed with absolute ethanol and dried to obtain Co -OPPh 3 Precursor.

[0025] Co-OPPh 3 The precursor was fully ground, and 0.5g was weighed and placed in a tube furnace. Under a nitrogen atmosphere, the temperature was raised to 600°C at 2°C / min and kept for 2h; the resulting product was repeatedly washed with absolute ethanol and dried to obtain CoP x / PC electrocatalyst (PC is phosphorus-doped carbon material).

[0026] CoP prepared in this example x / PC catalyst has good dispersibility in solvent, under alkaline conditions, the current density is 10mA / cm 2 , ...

Embodiment 2

[0028] Weigh 2.73g FeCl 3 Place in 40mL absolute ethanol, stir at room temperature until the metal salt dissolves into a homogeneous solution A; weigh 5.62g triphenylphosphine oxide (OPPh 3 ) was placed in 60mL of absolute ethanol, stirred at room temperature until dissolved to form a colorless and clear solution B; solution A was slowly added dropwise into solution B, and stirred continuously for 2 hours to obtain a precipitate, which was washed with absolute ethanol and dried to obtain Fe -OPPh 3 Precursor.

[0029] Fe-OPPh 3 The precursor was fully ground, and 0.5g was weighed and placed in a tube furnace. Under a nitrogen atmosphere, the temperature was raised to 600°C at 2°C / min and kept for 2h; the obtained product was repeatedly washed with absolute ethanol and dried to obtain FeP x / PC electrocatalyst.

[0030] FeP prepared in this embodiment x / PC catalyst has good dispersibility in solvent, under alkaline conditions, the current density is 10mA / cm 2 , the hydro...

Embodiment 3

[0032] Weigh 1.21g NiCl respectively 2 and 1.37g FeCl 3 Place in 40mL absolute ethanol, stir at room temperature until the metal salt dissolves into a homogeneous solution A; weigh 5.62g triphenylphosphine oxide (OPPh 3 ) in 60 mL of absolute ethanol, stirred at room temperature until dissolved to form a colorless and clear solution B; slowly drop solution A into solution B, and continuously stirred for 2 hours to obtain a precipitate, which was washed with absolute ethanol and dried to obtain NiFe -OPPh 3 Precursor.

[0033] NiFe-OPPh 3 The precursor was fully ground, and 0.5g was weighed and placed in a tube furnace. Under a nitrogen atmosphere, the temperature was raised to 600°C at 2°C / min and kept for 2h; the resulting product was repeatedly washed with absolute ethanol and dried to obtain NiFeP x / PC electrocatalyst.

[0034] The NiFeP prepared in this embodiment x / PC catalyst has good dispersibility in solvent, under alkaline conditions, the current density is 10...

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Abstract

The invention discloses a bimetallic phosphide hydrogen evolution catalyst and a preparation method. The catalyst is prepared from phosphorus doped nano-carbon and bimetallic phosphide nanoparticles. The preparation method comprises the steps as follows: firstly, mixing a metal chloride salt solution with an organic phosphorus source solution to prepare a precursor; decomposing the precursor at a high temperature to prepare the bimetallic phosphide hydrogen evolution catalyst. The bimetallic phosphide hydrogen evolution catalyst and the preparation method have the advantages that the preparation cost is low, the method is simple, amplification is facilitated, and the electrochemical catalysis activity is higher.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic hydrogen production, and in particular relates to a bimetallic phosphide hydrogen evolution catalyst and a preparation method. Background technique [0002] Catalytic hydrogen production has the advantages of high efficiency, low energy consumption, and environmental friendliness, and is a promising hydrogen production technology. However, due to the serious problem of cathode polarization at present, the energy consumption of catalytic hydrogen production technology has been greatly increased, thereby increasing the cost of hydrogen production. Noble metals such as Pt and their alloys have the best electrocatalytic hydrogen evolution performance, but their high cost makes it difficult to apply them on a large scale. The development of high-performance and low-cost non-precious metal catalysts is of great significance to promote the application of electrocatalytic hydrogen production tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/1853B01J35/50B01J35/33B01J35/40Y02E60/36
Inventor 银凤翔张晓何小波李国儒
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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