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Current-type sulfuretted hydrogen sensor using Pt-Rh/C as sensitive electrode and preparation method thereof

A hydrogen sulfide sensor and sensitive electrode technology, which is used in instruments, scientific instruments, material analysis by electromagnetic means, etc., can solve the problems such as the inability to meet the requirements of real-time monitoring of hydrogen sulfide, the large size of large-scale analytical instruments, and the complicated operation. The effect of zero power consumption, lower detection limit and simple preparation process

Inactive Publication Date: 2018-11-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The detection methods of hydrogen sulfide gas mainly include silver nitrate colorimetry, gas chromatography, iodometric method, methylene blue method, double optical path detection method of lead acetate reaction rate, color length d

Method used

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  • Current-type sulfuretted hydrogen sensor using Pt-Rh/C as sensitive electrode and preparation method thereof
  • Current-type sulfuretted hydrogen sensor using Pt-Rh/C as sensitive electrode and preparation method thereof
  • Current-type sulfuretted hydrogen sensor using Pt-Rh/C as sensitive electrode and preparation method thereof

Examples

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Embodiment 1

[0055] The Pt-Rh sensitive electrode material supported by carbon fiber was prepared by liquid phase reduction method, and the sensitive electrode material was hot-pressed on both sides of Nafion membrane to form a membrane electrode, and finally assembled to form a Nafion-based current-type hydrogen sulfide sensor. Its specific production process:

[0056] 1. Preparation of Pt-Rh / C sensitive electrode materials by liquid phase reduction method

[0057] Specific material preparation process:

[0058] (1) Weigh 0.4g carbon fiber powder into a beaker, add 10.26mL, 50mmol / L H 2 PtCl 6 solution, so that the mass ratio of carbon fiber and Pt is 4:1;

[0059] (2) Add 0.3 g of trisodium citrate as a stabilizer to the beaker of (1), wherein the mass ratio of Pt to trisodium citrate is 1:3, add deionized water, and prepare 50 mL of suspension;

[0060] (3) Put the prepared suspension into an ultrasonic cleaner for ultrasonic treatment for 30 minutes to make it evenly dispersed;

...

Embodiment 2

[0079] Prepare a sensitive electrode material with Pt:Rh=2:1, weigh the medicine according to the ratio shown in Table 1, and make the sensor as in Example 1. The difference from Example 1 is that sensitive electrode materials with different weight ratios of Pt and Rh are used, and the rest of the preparation conditions remain the same.

Embodiment 3

[0081] Prepare a sensitive electrode material with Pt:Rh=1:1, weigh the medicine according to the ratio shown in Table 1, and make the sensor as in Example 1. The difference from Example 1 is that sensitive electrode materials with different weight ratios of Pt and Rh are used, and the rest of the preparation conditions remain the same.

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Abstract

The invention discloses a Nafion-based current-type sulfuretted hydrogen sensor using Pt-Rh/C as a sensitive electrode and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor is composed of a gas filtering cap with gas diffusion holes, a Nafion film compound electrode, a current collection layer with a water supply hole and a water storage tank in sequence;the film compound electrode is prepared by hot-pressing a Pt-Rh/C sensitive material on the surfaces of the two sides of Nafion film. According to the Nafion-based current-type sulfuretted hydrogen sensor using the Pt-Rh/C as the sensitive electrode and the preparation method thereof, a novel high-conductivity solid electrolyte material Nafion is used as an ion conductivity layer, and carbon-supported Pt and Rh with high electrochemical catalysis activity are used as the sensitive material, so that the purposes of improving the sensibility and shortening response and recovery time are achieved; a sensor preparation technology is simple, the sensor can work at a room temperature, and energy consumption is zero, so that the sensor is environmentally friendly and has a commercial potential.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to a Nafion-based current-type hydrogen sulfide sensor using Pt-Rh / C as a sensitive electrode and a preparation method thereof. The sensor can be used to detect hydrogen sulfide in the atmosphere, factories and living environments. Background technique [0002] With the development of science and technology and the rapid progress of the economy and society, while people are enjoying an increasingly convenient life, a series of problems have also emerged, such as air pollution caused by vehicle exhaust and industrial waste gas, and the emission of toxic and harmful substances. In order to control and monitor these toxic and harmful gases, it is necessary to know the types of gases present in the atmosphere. Therefore, the development of efficient devices using different materials (including carbonaceous compounds, metal oxides, sulfides, nitrides, etc.) and technologi...

Claims

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Application Information

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IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 卢革宇杨鑫宇梁喜双刘凤敏
Owner JILIN UNIV
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