Tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst as well as preparation method and application thereof

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: 2022-01-07
广东粤绿环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the piezoelectric properties of strontium titanate are weak

Method used

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  • Tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst as well as preparation method and application thereof
  • Tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst as well as preparation method and application thereof
  • Tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation and application of a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst comprises the following steps: S01 prepares solution A; S02 prepares solution B, and mixes solution A and solution B to obtain solution C; S03 solution C Stand still, centrifuge and dry to obtain precursor D, and precursor D is calcined to obtain a kind of tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst; Wherein,

[0035] S01: Add 0.01mol tetrabutyl titanate to 50mL ethylene glycol, stir for 15min to obtain solution A;

[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 Add it into 200mL deionized water, stir in a water bath at 80°C for 30min until the solid is completely dissolved to obtain solution B. Under stirring, slowly add solution B dropwise to solution A to obtain mixed solution C;

[0037]S03: Leave solution C for 3 hours, centri...

Embodiment 2

[0041] Weigh 5 mg of the tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst provided in Example 1, use 5 mL of 0.05 mol / L sodium sulfite as the sacrificial agent for piezoelectric hydrogen production, and conduct the experiment in a small closed tube. Before that, pass nitrogen 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 As seen in the pure SrTiO 3 After 80min of ultrasonication, the hydrogen production was only 53μmol / g. With the increase of Sn and Ce content, the hydrogen production effect has been improved to varying degrees, especially the produced SCST-10%, after 80 min of ultrasonication, its hydrogen production has been greatly improved, reaching 411 μmol / g , is pure SrTiO 3 7.75 times. This is because...

Embodiment 3

[0046] With 0.5mol / L sodium sulfate solution as conductive solution, platinum wire as counter electrode, and calomel electrode as 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] Figure 6 Show Sn 0.1 Ce 0.1 Sr 0.8 TiO 3 The transient current density reaches about 4μA / 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 radius of Sn and Ce is larger than that of Sr, resulting in stronger deformation under the same piezoelectric force, resulting in stronger polarization and stronger built-in electric field, which promotes the separation and separation of carriers. transfer.

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Abstract

The invention relates to the technical field of piezoelectric catalytic hydrogen production materials, and provides a tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst as well as a preparation method and application thereof. The chemical general formula of the material prepared according to the invention is SnxCeySr(1-x-y)TiO3 (x is more than 0 and less than or equal to 0.15, and y is more than 0 and less than or equal to 0.15). A Sr source, a Ce source, a Sn source and a Ti source are mixed with water and ethylene glycol, a coprecipitation method is adopted, a precursor of the tin and cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst is prepared, and finally the solid solution piezoelectric hydrogen production catalyst is formed through high-temperature calcination. The result of the embodiment shows that the piezoelectric hydrogen production performance of SrTiO3 is greatly improved due to the introduction of Sn and Ce. Moreover, when x is equal to 0.1 and y is equal to 0.1, the hydrogen production efficiency is the best, reaches 411 [mu]mol/g and is far higher than 53.45 [mu]mol/g of SrTiO3.

Description

technical field [0001] The invention relates to the technical field of piezoelectric catalytic hydrogen production materials, in particular to a tin, cerium-strontium titanate solid solution piezoelectric hydrogen production catalyst and its preparation method and application. Background technique [0002] All survival and development of human beings 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 people's gradual increase in energy demand and the gradual depletion of energy. On the other hand, the use of non-renewable energy such as coal, oil, and natural gas produces a large amount of harmful substances (NOx, SOx, etc.), which can easily lead to the formation of acid rain and also produce CO 2 and other greenhouse gases, making it more difficult for environmental governance and restoration. Theref...

Claims

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Application Information

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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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