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A working electrode for hydrogen peroxide electrochemical sensor based on vanadium-containing heteropolyacid-pt@pd/pb

A technology of working electrode and hydrogen peroxide, which is applied in the direction of material electrochemical variables, etc., can solve the problems of application limitation, high cost of nanoparticles, etc., and achieve the effects of low detection limit, fast detection speed and sensitive detection

Inactive Publication Date: 2019-04-26
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nanoparticles are expensive, which greatly limits its application, and Pd, as a new metal catalyst, has the same catalytic activity as platinum, but its price is much cheaper than platinum.

Method used

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  • A working electrode for hydrogen peroxide electrochemical sensor based on vanadium-containing heteropolyacid-pt@pd/pb
  • A working electrode for hydrogen peroxide electrochemical sensor based on vanadium-containing heteropolyacid-pt@pd/pb
  • A working electrode for hydrogen peroxide electrochemical sensor based on vanadium-containing heteropolyacid-pt@pd/pb

Examples

Experimental program
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specific Embodiment approach 1

[0031] Embodiment 1: A working electrode for an electrochemical sensor based on vanadium-containing heteropolyacid-Pt@Pd / PB in this embodiment is composed of ITO electrodes and [PEI / PB / PEI / PW] wrapped by ITO electrodes. 9 V 3 -Pt@Pd] n The modified film is composed of the first PEI: polyethyleneimine Ⅰ layer, PB: Prussian blue layer, the second PEI: polyethyleneimine Ⅱ layer and PW from the outer layer of the ITO electrode. 9 V 3 -Pt@Pd: vanadium-containing heteropolyacid layer loaded with bimetallic nanoparticles, one cycle per four layers, cycle n times.

specific Embodiment approach 2

[0032] Embodiment 2: This embodiment is different from Embodiment 1 in that n=1-6. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0033] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the thickness of the polyethyleneimine I layer in each cycle is 0.08 μm to 0.09 μm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a working electrode based on vanadium-containing heteropolyacid-Pt@Pd / PB used for an electrochemical sensor, belongs to the technical field of electrochemical sensors and specifically relates to the working electrode based on vanadium-containing heteropolyacid-Pt@Pd / PB used for the electrochemical sensor. The working electrode aims at solving the problems that a non-enzymatic sensor currently used for detecting hydrogen peroxide is narrow in linear range, high in detection limit and slow in response time. A product is formed by an ITO (indium tin oxide) electrode and a [PEI / PB / PEI / PW9V3-Pt@Pd]n modified membrane wrapped outside the ITO electrode, every four layers form a circulation, and circulation is conducted for 4 times, wherein n is equal to 1-6; the electrochemical sensor established by the working electrode has high detection performance for hydrogen peroxide. The linear detection range is 4.0*10<7> M-2.65*10<3> M, the detection limit is 1.0*10<7> M, and the response time is less than 1.0 s.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, in particular to a working electrode for electrochemical sensors based on vanadium-containing heteropolyacid-Pt@Pd / PB. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) is an important by-product in industrial production, and it is also an oxidation product of some metabolic reactions in the human body. h 2 o 2 The concentration is closely related to human health, so the H 2 o 2 Rapid and accurate detection of content is of great significance in food, pharmaceutical, biological and environmental analysis. Currently, there are many methods for detecting hydrogen peroxide, such as titration, spectrophotometry, and electrochemical methods. Among them, electrochemical methods, especially enzyme electrochemical sensors, are widely used in the determination of hydrogen peroxide due to their simple method and high sensitivity. However, in the development of enzyme electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 马慧媛朱迪庞海军谭立超
Owner HARBIN UNIV OF SCI & TECH