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Iridium rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and preparation method thereof

A technology of hydrogen evolution reaction and nanosheets, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of limiting wide application and high cost, and achieve experimental The effect of simple steps, easy operation, and good application prospects

Inactive Publication Date: 2020-04-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal platinum-based materials are traditional catalysts for hydrogen evolution reaction, but the high cost limits their wide application

Method used

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  • Iridium rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and preparation method thereof
  • Iridium rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and preparation method thereof
  • Iridium rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of an iridium-rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction, said method comprising the steps of:

[0047] 1) prepare iridium chloride and rhodium chloride solutions with a concentration of 20mM respectively;

[0048] 2) Take 1mL of N,N-dimethylformamide, dissolve 5mg of PS-b-PEO in it; then add 1mL of iridium chloride solution and 1mL of rhodium chloride solution; finally add 1mL of formic acid solution ,well mixed;

[0049] 3) After the solution is fully mixed, place it in a water bath and heat it to 80° C., react for 5 hours, centrifuge, collect the precipitate and wash to obtain an iridium-rhodium nanosheet assembly.

[0050] The SEM figure of the obtained iridium-rhodium nanosheet assembly is shown in figure 1 . The TEM and HRTEM figures of the obtained iridium-rhodium nanosheet assembly are shown in figure 2 . The XRD pattern of the obtained iridium-rhodium nanosheet assembly is shown in image 3 ...

Embodiment 2

[0053] A preparation method of an iridium-rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction, said method comprising the steps of:

[0054] 1) preparation concentration is the rhodium chloride solution of 20mM;

[0055] 2) Take 1mL of N,N-dimethylformamide, dissolve 5mg of PS-b-PEO in it; then add 2mL of rhodium chloride solution; finally add 1mL of formic acid solution, and mix well;

[0056] 3) After the solution is fully mixed, place it in a water bath and heat it to 80° C., react for 5 hours, centrifuge, collect the precipitate and wash to obtain an iridium-rhodium nanosheet assembly.

[0057] The SEM and TEM pictures of the obtained rhodium nanoparticles are shown in Figure 7 . The XPS figure of rhodium element in the rhodium nanoparticle that obtains is referring to Figure 8 . The obtained linear sweep voltammetry and Tafel slopes of rhodium nanoparticles are shown in Figure 9 .

[0058] It can be seen from the SEM and TEM imag...

Embodiment 3

[0060] A preparation method of an iridium-rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction, said method comprising the steps of:

[0061] 1) preparation concentration is the iridium chloride solution of 20mM;

[0062] 2) Take 1mL of N,N-dimethylformamide, dissolve 5mg of PS-b-PEO in it; then add 2mL of iridium chloride solution; finally add 1mL of formic acid solution and mix well.

[0063] 3) After the solution is fully mixed, place it in a water bath and heat it to 80° C., react for 5 hours, centrifuge, collect the precipitate and wash to obtain an iridium-rhodium nanosheet assembly.

[0064] The SEM and TEM images of the iridium nanosheets obtained are shown in Figure 10 . The XPS figure of iridium element in the iridium nanoplate that obtains is referring to Figure 11 . The obtained linear sweep voltammetry curve and Tafel slope of the iridium nanosheets can be found in Figure 12 .

[0065] It can be seen from the SEM and TEM i...

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Abstract

The invention relates to an iridium rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a iridium chloride solution and a rhodium chloride solution with the concentrations of 5-100mM; taking 0.5-3 mL of N, N-dimethylformamide , and dissolving 2-20 mg of PS-b-PEO in N, N-dimethylformamide; then adding the iridium chloride solution and the rhodium chloride solution with the total volume of 2mL; finally, adding 0.2-5mL of a formic acid solution, and uniformly mixing; after solution fully mixing, putting an obtained mixed solution into a water bath kettle, heating to 40-95 DEG C, reacting for 2-10 hours, carrying out centrifugal separation, collectinga precipitate, and washing to obtain the iridium rhodium nanosheet assembly electrocatalyst. The operation steps are simple, the reaction conditions are mild, and the iridium rhodium nanosheet assembly prepared through the one-step method has excellent electro-catalytic hydrogen evolution reaction performance.

Description

[0001] (1) Technical field [0002] The invention relates to an iridium-rhodium nanosheet assembly electrocatalyst for catalyzing hydrogen evolution reaction and a preparation method thereof. The catalyst can be used for research on electrochemically catalyzing hydrogen evolution reaction. [0003] (2) Background technology [0004] Hydrogen is a clean energy with the greatest potential to replace fossil fuels. Hydrogen production by electrolysis of water is green and environmentally friendly, and it is an effective way to produce hydrogen with high efficiency. In the process of water electrolysis, the selection of highly active catalysts for cathodic hydrogen evolution reaction is crucial to improve the efficiency of electrolysis (Zhaojun Liu, Jing Qi, Moxuan Liu, Shumeng Zhang, Qikui Fan, HongpoLiu, Kai Liu, Haoquan Zheng, Yadong Yin , and Chuanbo Gao, Aqueous Synthesis of Ultrathin Platinum / Non-Noble Metal Alloy Nanowires for Enhanced Hydrogen Evolution Activity (Aqueous Sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J37/10B01J37/16B82Y30/00B82Y40/00C25B11/08C25B1/04
CPCB01J23/468B01J37/10B01J37/16B82Y30/00B82Y40/00C25B1/04C25B11/097B01J35/33Y02E60/36
Inventor 王亮李春洁王自强许友王鸿静
Owner ZHEJIANG UNIV OF TECH
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