Preparation of vanadium-doped sodium niobate piezoelectric catalyst and application of vanadium-doped sodium niobate piezoelectric catalyst in preparation of hydrogen peroxide and hydrogen by catalytic cracking of intermediate water

A catalytic cracking, sodium niobate technology, applied in heterogeneous catalyst chemical elements, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the dangerous, slow oxygen evolution reaction kinetics , reduce water splitting conversion efficiency and other problems, to achieve the effect of improving efficiency

Pending Publication Date: 2022-06-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current water splitting hydrogen production method still has some shortcomings. First, the kinetics of the oxygen evolution reaction in the four-electron reaction pathway is slow, resulting in low water splitting efficiency.
Second, it is difficult to separate the generated hydrogen-oxygen mixed gas, and the coexisting hydrogen-oxygen mixed gas is not only dangerous, but also prone to reverse reactions to reduce the conversion efficiency of water splitting
However, at present, most of the researches on the splitting of intermediate water to produce hydrogen and hydrogen peroxide are concentrated in the field of photocatalysis and electrocatalysis, while the method of catalytic cracking of intermediate water to produce hydrogen peroxide and hydrogen by piezoelectric catalyst is rarely reported.

Method used

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  • Preparation of vanadium-doped sodium niobate piezoelectric catalyst and application of vanadium-doped sodium niobate piezoelectric catalyst in preparation of hydrogen peroxide and hydrogen by catalytic cracking of intermediate water
  • Preparation of vanadium-doped sodium niobate piezoelectric catalyst and application of vanadium-doped sodium niobate piezoelectric catalyst in preparation of hydrogen peroxide and hydrogen by catalytic cracking of intermediate water
  • Preparation of vanadium-doped sodium niobate piezoelectric catalyst and application of vanadium-doped sodium niobate piezoelectric catalyst in preparation of hydrogen peroxide and hydrogen by catalytic cracking of intermediate water

Examples

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Effect test

Embodiment 1

[0028] Example 1 Preparation of sodium niobium-doped niobate and application in the preparation of hydrogen peroxide and hydrogen in catalytic cracking of intermediate water

[0029] according to Figure 1 The present embodiment of the process flow diagram comprises the following steps:

[0030] (1) Preparation of sodium vanadium-doped niobate (V-NaMbO) by hydrothermal method 3): Take 1g niobium oxide and 0.01g vanadium oxide with a mortar grinding and mixing evenly, and then add the mixture to a 40mL sodium hydroxide solution with a concentration of 10M, quickly stir (600r / min) 1h after the mixed mixture is transferred to the high-pressure reactor, and then heated at 180 °C for 18h, after the reaction is completed, the autoclave is cooled to room temperature, the supernatant is removed to obtain a pale yellow precipitate, and the precipitate is repeatedly washed with deionized water for 3-5 times. The resulting pellet was then dried in a vacuum oven at 60 °C to give a pale yellow ...

Embodiment 2

[0036] Example 2 Preparation of sodium niobium-doped niobate and application in the preparation of hydrogen peroxide and hydrogen in catalytic cracking of intermediate water

[0037] according to Figure 1 The present embodiment of the process flow diagram comprises the following steps:

[0038] (1) Preparation of sodium vanadium-doped niobate (V-NaMbO) by hydrothermal method 3 ): Take 1g of niobium oxide and 0.05g of vanadium oxide mixed and grinded, and then under the condition of room temperature stirring, the ground mixture was added to the 40mL sodium hydroxide solution with a concentration of 10M, stirred quickly for 1h and then transferred the mixed mixture to the high-pressure reactor, and then heated at 180 °C for 18h, after the end of the reaction, the high-pressure reactor was cooled to room temperature, the supernatant was removed to obtain a yellowish precipitate, and the precipitate was repeatedly washed with deionized water for 3-5 times. The resulting pellet was the...

Embodiment 3

[0043] Example 3 Preparation of sodium niobium-doped niobate and application in the preparation of hydrogen peroxide and hydrogen in catalytic cracking of intermediate water

[0044] according to Figure 1 The present embodiment of the process flow diagram comprises the following steps:

[0045] (1) Preparation of sodium vanadium-doped niobate (V-NaMbO) by hydrothermal method 3 ): Take 1g niobium oxide and 0.1g vanadium oxide mixed grinding, and then under the condition of room temperature stirring, the ground mixture is added to the 40mL sodium hydroxide solution with a concentration of 10M, quickly stirred for 1h after the mixed mixture is transferred to the high-pressure reactor, and then heated at 180 °C for 18h, after the end of the reaction, the high-pressure reactor is cooled to room temperature, the supernatant is removed to obtain a pale yellow precipitate, the precipitate is repeatedly washed with deionized water for 3-5 times, and then the obtained precipitate is placed ...

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Abstract

The invention belongs to the technical field of hydrogen production through water decomposition, and particularly relates to preparation of a vanadium-doped sodium niobate piezoelectric catalyst and application of the vanadium-doped sodium niobate piezoelectric catalyst in preparation of hydrogen peroxide and hydrogen through catalytic cracking of intermediate water. The vanadium-doped sodium niobate piezoelectric catalyst can be applied to preparation of hydrogen peroxide and hydrogen through catalytic cracking of intermediate water, and compared with original sodium niobate, the vanadium-doped sodium niobate piezoelectric catalytic hydrogen production efficiency and the hydrogen peroxide production efficiency are greatly improved, and the vanadium-doped sodium niobate piezoelectric catalytic hydrogen production efficiency and the vanadium-doped sodium niobate piezoelectric catalytic hydrogen production efficiency are greatly improved. And a new way and direction are provided for the method for preparing hydrogen peroxide and hydrogen through catalytic cracking of intermediate water by using the piezoelectric catalyst.

Description

Technical field [0001] The present invention belongs to the field of water decomposition hydrogen production technology, specifically relates to the preparation of a vanadium-doped sodium niobate piezoelectric catalyst and its application in the preparation of hydrogen peroxide and hydrogen in the catalytic cracking of intermediate water. Background [0002] The use of catalysts to convert water into hydrogen and oxygen is an efficient, low-cost hydrolysis hydrogen production technology that is essential to solving today's energy shortages and environmental pollution problems. However, the current water decomposition hydrogen production method still has a certain lack of traps, one is that the oxygen evolution reaction kinetics of the four-electron reaction pathway are slow, resulting in low water decomposition efficiency. Second, the separation of the generated hydrogen-oxygen mixture is more difficult, and the co-existing hydrogen-oxygen mixture not only has certain dangers, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C01B3/04C01B15/027
CPCB01J23/22B01J23/002C01B3/042C01B15/027B01J2523/00B01J2523/12B01J2523/55B01J2523/56Y02E60/36
Inventor 王梦晔刘芳艳李玥琨姚杉刘佳雯王彪何佳庆高峰黄丰
Owner SUN YAT SEN UNIV
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