Hydrogen detector based on precious metal coupling

A precious metal and detector technology, which is applied in the field of hydrogen detectors based on precious metal coupling, can solve the problems of low hydrogen detection sensitivity and small regulation force, and achieve the effects of high sensitivity, large regulation force and good application prospect.

Active Publication Date: 2022-04-29
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the optical fiber-based hydrogen sensor has a high degree of system integration, the regulation of the light in the optical fiber by hydrogen gas is weak, resulting in low hydrogen detection sensitivity.

Method used

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  • Hydrogen detector based on precious metal coupling
  • Hydrogen detector based on precious metal coupling
  • Hydrogen detector based on precious metal coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present invention provides a hydrogen detector based on noble metal coupling, such as figure 1 As shown, it includes a substrate 1, an elastic layer 2, and a sensitive unit. The material of the substrate 1 is not limited, and the substrate 1 may be silicon dioxide. The elastic layer 2 is placed on the substrate 1, and the material of the elastic layer 2 is thermal conductive silica gel. The sensitive units are periodically placed on the elastic layer 2, and the period of the sensitive units is a square period. The sensitive unit includes a palladium block 3 , a first noble metal part 4 and a second noble metal part 5 . The material of the first noble metal part 4 and the second noble metal part 5 is gold or silver. The thickness of the palladium block 3 is less than 4 microns. The palladium block 3 is arranged on the elastic layer 2 , and the first noble metal part 4 and the second noble metal part 5 are arranged on the palladium block 3 . A gap is provided bet...

Embodiment 2

[0028] On the basis of Example 1, such as figure 2 As shown, the first noble metal part 4 and the second noble metal part 5 are rod-shaped. The first noble metal part 4 and the second noble metal part 5 are on a straight line. The palladium block 3 is rectangular. That is, the palladium block 3 is a rectangular block, or the palladium block 3 is a rectangular film. The first noble metal part 4 and the second noble metal part 5 are placed on the axis of symmetry of the palladium block 3 , specifically the bisector of a side. In application, the incident light is linearly polarized light, and the polarization direction of the light is along the line connecting the first noble metal part 4 and the second noble metal part 5 . Under the excitation of incident light, longitudinal localized surface plasmon resonance occurs on the first noble metal part 4 and the second noble metal part 5, and longitudinal localized surface plasmon resonance occurs on the first noble metal part 4 ...

Embodiment 3

[0030] On the basis of Embodiment 2, a palladium film is further provided on the first noble metal part 4 and the second noble metal part 5 . The thickness of the palladium film is less than 20 nanometers. In this way, the palladium material covers or partially covers the first noble metal part 4 and the second noble metal part 5 . The palladium film on the first noble metal part 4 and the second noble metal part 5 can also expand by absorbing hydrogen, resulting in more changes in the distance between the first noble metal part 4 and the second noble metal part 5, thereby changing the composite structure more The resonant wavelength, so as to realize the detection of hydrogen with higher sensitivity. In addition, the palladium material coats or partially coats the first noble metal part 4 and the second noble metal part 5, and when the palladium film absorbs hydrogen, the medium around the first noble metal part 4 and the second noble metal part 5 is more changed. The elect...

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Abstract

The invention relates to the technical field of hydrogen detection, in particular to a hydrogen detector based on precious metal coupling, which comprises a substrate, an elastic layer and a sensing unit, the elastic layer is arranged on the substrate, the sensing unit is periodically arranged on the elastic layer, the sensing unit comprises a palladium block, a first precious metal part and a second precious metal part, the palladium block is arranged on the elastic layer, and the first precious metal part is arranged on the first precious metal part. The first precious metal part and the second precious metal part are arranged on the palladium block, and a gap is formed between the first precious metal part and the second precious metal part. During application, in a to-be-detected hydrogen environment, the continuous spectrum light source irradiates the first noble metal part and the second noble metal part, the palladium block adsorbs hydrogen to generate expansion, and hydrogen or hydrogen concentration detection is realized through movement of resonant wavelength. In the invention, the size of the palladium block for adsorbing hydrogen is large, and the sizes of the first noble metal part and the second noble metal part which cause the resonance wavelength to move are small, so that the adjustment force of the hydrogen on the resonance wavelength is large, and the hydrogen detection with higher sensitivity is realized.

Description

technical field [0001] The invention relates to the technical field of hydrogen detection, in particular to a hydrogen detector based on noble metal coupling. Background technique [0002] Hydrogen has the advantages of high combustion value, renewable, clean and pollution-free, and is an ideal clean energy. Due to the small size of hydrogen atoms, leakage is easy to occur. Moreover, when the concentration of hydrogen in the air reaches 4% to 75%, it will explode when encountering an open flame, electric current, etc., and a serious accident will occur. Therefore, the detection of hydrogen concentration is an important link in the safe application of hydrogen energy. [0003] Common hydrogen concentration detection sensors include electrochemical hydrogen sensors, semiconductor hydrogen sensors and optical fiber hydrogen sensors. Electrochemical hydrogen sensors and semiconductor hydrogen sensors are easily disturbed by the external environment. Fiber-based hydrogen sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/25
CPCG01N21/01G01N21/25
Inventor 邵雅斌陈晨贾炀王君李强于海龙刘佳
Owner ZHEJIANG SHUREN UNIV
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