A tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and its preparation method and application

A technology of strontium titanate and solid solution, which is applied in the field of piezoelectric catalytic hydrogen production materials, can solve the problems of limited application and weak piezoelectric performance of strontium titanate

Active Publication Date: 2022-06-28
广东粤绿环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the piezoelectric properties of strontium titanate are weak, which limits its application in piezoelectric hydrogen production.

Method used

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  • A tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and its preparation method and application
  • A tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and its preparation method and application
  • A tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Preparation and application of a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst, comprising the following steps: S01 to prepare solution A; S02 to prepare solution B, and solution A and solution B to be mixed to prepare solution C; S03 to solution C standing, centrifugal drying to obtain precursor D, and precursor D is calcined to obtain a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst; wherein,

[0035] S01: 0.01mol of tetrabutyl titanate was added to 50mL of ethylene glycol, and the solution A was obtained after stirring for 15min;

[0036] S02: Weigh 0.007-0.01mol of Sr(OH) 2 ·8H 2 O, 0-0.0015mol Ce (NO 3 ) 3 ·6H 2 O and 0-0.0015mol of SnCl 2 It was added to 200 mL of deionized water, and stirred in a water bath at 80° C. for 30 min until the solid was completely dissolved to obtain solution B. Under stirring, solution B was slowly added dropwise to solution A to obtain mixed so...

Embodiment 2

[0041] Weigh 5 mg of the tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst provided in Example 1, and use 5 mL of 0.05 mol / L sodium sulfite as a sacrificial agent for piezoelectric hydrogen production. Before that, nitrogen was passed for 10 minutes to eliminate the interference of hydrogen in the air. Using a 40kHz 80W ultrasonic cleaner as the piezoelectric driving force, the piezoelectric hydrogen production effect of the piezoelectric hydrogen production catalyst was studied.

[0042] from Figure 4 It is seen that pure SrTiO 3 After 80 min of sonication, the hydrogen production yield was only 53 μmol / g. With the increase of Sn and Ce content, the hydrogen production effect has been improved to different degrees, especially the SCST-10% obtained, after 80min of ultrasonic, its hydrogen production has been greatly improved, reaching 411μmol / g , is pure SrTiO 3 7.75 times. This is because Sn and Ce introduction enhances pure SrTiO ...

Embodiment 3

[0046] Using 0.5mol / L sodium sulfate solution as the conductive solution, platinum wire as the counter electrode, and calomel electrode as the reference electrode, the tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst SrTiO provided in Example 1 was tested. 3 and Sn 0.1 Ce 0.1 Sr 0.8 TiO 3 piezoelectric response current.

[0047] Image 6 show Sn 0.1 Ce 0.1 Sr 0.8 TiO 3 The transient current density reaches about 4 μA / cm 2 , while SrTiO 3 The piezoelectric response current is only 1.2μA / cm 2 . This indicates that the solid solution conductivity of the formed SCST-10% is much higher than that of pure SrTiO 3 , this is because the atomic radii of Sn and Ce are larger than Sr, resulting in stronger deformation under the same piezoelectric force, resulting in stronger polarization and stronger built-in electric field, which promotes the separation of carriers and transfer.

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Abstract

The invention relates to the technical field of piezoelectric catalytic hydrogen production materials, and provides a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and a preparation method and application thereof. According to the material prepared by the present invention, its general chemical formula is Sn x Ce y Sr (1‑x‑y) TiO 3 (0<x≤0.15, 0<y≤0.15). In the present invention, Sr source, Ce source, Sn source and Ti source are mixed with water and ethylene glycol, and a co-precipitation method is used to prepare a precursor of a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst, and finally calcined at high temperature A solid solution piezoelectric hydrogen production catalyst is formed. The results of the examples show that the introduction of Sn and Ce makes SrTiO 3 The piezoelectric hydrogen production performance has been greatly improved. And, when x=0.1, y=0.1, it has the best hydrogen production efficiency, reaching 411 μmol / g, much higher than SrTiO 3 of 53.45 μmol / g.

Description

technical field [0001] The invention relates to the technical field of piezoelectric catalytic hydrogen production materials, and more particularly to a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and a preparation method and application thereof. Background technique [0002] All human survival and development need energy as a support. At present, energy crisis and environmental pollution have become the two most serious problems that hinder human development. On the one hand, the energy problem is a serious contradiction between the gradual growth of people's energy demand and the gradual depletion of energy. On the other hand, non-renewable energy sources such as coal, oil, and natural gas produce a large amount of harmful substances (NOx, SOx, etc.) during use, which can easily lead to the formation of acid rain and also produce CO. 2 and other greenhouse gases, making it more difficult to manage and restore the environment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14C02F1/36C01B3/04C02F101/38C02F101/34
CPCB01J23/14B01J23/002C02F1/36C01B3/042B01J2523/00C02F2101/38C02F2101/34B01J2523/24B01J2523/3712B01J2523/43B01J2523/47Y02E60/36
Inventor 陈阵黄晓峰
Owner 广东粤绿环境工程有限公司
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