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Electrode used for ethyl alcohol catalysis and application of electrode

An electrode, ethanol technology, applied in the field of catalysis, can solve the problems of limited electrode catalytic performance, achieve good electrochemical catalytic performance, huge application prospects, and improve the effect of reaction rate

Active Publication Date: 2018-03-30
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, currently only Pd-Cu composite electrodes are prepared using carbon nanotubes as carriers. [1] reported that the electrode has limited catalytic performance

Method used

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  • Electrode used for ethyl alcohol catalysis and application of electrode
  • Electrode used for ethyl alcohol catalysis and application of electrode
  • Electrode used for ethyl alcohol catalysis and application of electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 20mg·ml -1 The AgNWs were diluted with ethanol and water to 5 mg·ml -1 , take 20μL and spread evenly on PDMS (0.6×1.95cm 2 ). A three-electrode electrochemical electrolysis cell system was adopted, with PDMS loaded with AgNWs as the working electrode, Ag / AgCl electrode as the reference electrode, and platinum wire as the auxiliary electrode to form a three-electrode system. The three-electrode system was placed in 5mmol L -1 PdCl 2 In the solution, Pd was deposited by electrochemical cyclic voltammetry, the potential range was -0.25-0.4V, and the scanning speed was 25mV / s. 30, 35 laps.

[0024] (2) Take out the AgNWs deposited with Pd in ​​step (1), wash them, dry them naturally, and place them for at least 12 hours to prepare AgNWs / Pd nanocomposites. The composite material was observed by scanning electron microscope, and its surface morphology was as follows: figure 1 shown. from figure 1 It can be clearly observed that as the number of deposition circ...

Embodiment 2

[0028] A three-electrode system electrochemical cell system was adopted, the PDMS electrode loaded with AgNWs and the PDMS electrode loaded with AgNWs / Pd nanocomposite were used as the working electrode, the Ag / AgCl electrode was used as the reference electrode, and the platinum wire was used as the auxiliary electrode. A three-electrode system was placed in 5mmol / L PdCl 2 In solution, a cyclic voltammetry scan was performed.

[0029] like figure 2As shown, the oxidation peak current density of ethanol on the AgNWs / Pd electrode is much higher than that on the AgNWs electrode, and the oxidation peak of ethanol on the AgNWs / Pd electrode is more negative, indicating that the presence of palladium makes ethanol more easily Oxidation. Pd can promote the deprotonation of alcohols in the base electrolyte, while Ag can promote the oxidation of intermediate aldehydes. Therefore, the combination of two active sites (Pd and Ag) with two different functions can simultaneously increase...

Embodiment 3

[0031] Using a two-electrode system, the PDMS electrode loaded with AgNWs and the PDMS electrode loaded with AgNWs / Pd nanocomposite were used as the working electrode, and the Ag / AgCl electrode was used as the reference electrode. The two-electrode system was placed at 0.1mol L -1 KOH+1mol L -1 CH 3 CH 2 In the OH solution, the open circuit voltage test is carried out, and the test time is 1000s. Then a three-electrode system was adopted, with the AgNWs-loaded PDMS electrode and the AgNWs / Pd nanocomposite electrode as the working electrode, the Ag / AgCl electrode as the reference electrode, and the platinum wire as the auxiliary electrode. -1 KOH+1mol L -1 CH 3 CH 2 OH solution for AC impedance test. Figure 5 The size of the arc of the middle curve reflects the relative speed of the kinetic process in the electrochemical system. The smaller the diameter of the arc, the easier the charge transfer in the electrochemical process, and the faster the relative speed of the kin...

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Abstract

The invention relates to the catalysis technical field, and specifically relates to an electrode used for ethyl alcohol catalysis and an application of the electrode. The electrode is constituted in amanner of taking an AgNWs / Pd nanocomposite as a working electrode, taking Ag / AgCl as a reference electrode, and taking platinum wires as an auxiliary electrode. The electrode provided by the invention has the characteristics of high efficiency, simplicity and the like; by virtue of the electrode, the ethyl alcohol reaction rate can be improved in an alkali condition; the catalysis efficiency is 1.7*10<4>; and the electrode has high electrochemical catalytic performance on ethyl alcohol and has huge application prospect in the field of a fuel cell.

Description

technical field [0001] The present invention relates to the technical field of catalysis, in particular to a method of drip-coating silver nanowires on surface-modified polydimethylsiloxane, and depositing nano-palladium on the surface of silver nanowires to prepare silver nanowires / Palladium nanoparticles electrode for electrochemical catalysis of ethanol. Background technique [0002] Ethanol is the organic molecule with the simplest structure in chain alcohol molecules, especially ethanol can be produced in large quantities through crop fermentation, and can also be obtained from other biomass sources, and is a renewable energy source with a wide range of sources. Direct ethanol fuel cell (DEFC) uses ethanol aqueous solution as fuel, avoids the combustion process, and has the advantages of environmental protection, convenient fuel use, and strong overload capacity. Because ethanol has a wide range of sources, is easy to prepare and regenerate, and can maintain a high co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/92H01M8/1011B82Y30/00
CPCB82Y30/00H01M4/8663H01M4/8803H01M4/8817H01M4/8853H01M4/921H01M4/925H01M8/1013Y02E60/50
Inventor 孙晶李咏焕申贵隽郎明非
Owner DALIAN UNIV
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