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Ni-Cu binary catalyst for improving performance of direct borohydride fuel cell

A fuel cell and catalyst technology, applied in the field of electrochemical applications, can solve the problems of low direct oxidation performance, high charge transfer resistance, and low fuel utilization rate, so as to enhance direct oxidation performance, reduce charge transfer resistance, and improve discharge efficiency effect

Inactive Publication Date: 2011-11-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using Ni as the anode catalyst in the prior art, BH 4 - The direct oxidation performance of Ni is not high, the Ni electrode is easy to corrode, the charge transfer resistance is large, and the fuel utilization rate is low

Method used

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  • Ni-Cu binary catalyst for improving performance of direct borohydride fuel cell
  • Ni-Cu binary catalyst for improving performance of direct borohydride fuel cell
  • Ni-Cu binary catalyst for improving performance of direct borohydride fuel cell

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Experimental program
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Effect test

Embodiment 1

[0015] Under normal pressure, the temperature is in the range of 293.15 ~ 313.15K, configure 0.25mol / L CuSO 4 solution (acidic conditions). 2cm 2 The Ni sheet (as the working electrode) is placed in the above solution, the Cu rod is used as the counter electrode, and the silver silver chloride electrode is used as the reference electrode. On the electrochemical workstation, the method of constant potential (-0.1V) is used for electrodeposition for 5s. , to prepare Ni-Cu binary catalyst. Weigh sodium borohydride, and dissolve it in 2mol / L sodium hydroxide solution to prepare 0.27mol / L sodium borohydride solution, mix well and use it as electrolyte for direct sodium borohydride fuel cell. 2cm 2 The Ni sheet and Ni-Cu were used as the working electrode, the mercury oxide mercury electrode was used as the reference electrode, and the graphite rod was used as the auxiliary electrode. Cyclic voltammetry was used for performance testing.

[0016] figure 1 gives NaBH 4 Anodic ox...

Embodiment 2

[0019] Under normal pressure, the temperature is in the range of 293.15 ~ 313.15K, configure 0.25mol / L CuSO 4 solution (acidic conditions). 2cm 2 The Ni sheet (as the working electrode) is placed in the above solution, the Cu rod is used as the counter electrode, and the silver silver chloride electrode is used as the reference electrode. On the electrochemical workstation, the method of constant potential (-0.1V) is used for electrodeposition for 5s. , to prepare Ni-Cu binary catalyst. Weigh sodium borohydride, and dissolve it in 2mol / L sodium hydroxide solution to prepare 0.27mol / L sodium borohydride solution, mix well and use it as electrolyte for direct sodium borohydride fuel cell. 2cm 2 The Ni sheet and Ni-Cu are used as the working electrode, the mercury oxide mercury electrode is used as the reference electrode, and the graphite rod is used as the auxiliary electrode, and the AC impedance spectroscopy performance test is carried out.

[0020] In the AC impedance sp...

Embodiment 3

[0022] Under normal pressure, the temperature is in the range of 293.15 ~ 313.15K, configure 0.25mol / L CuSO 4 solution (acidic conditions). 2cm 2 The Ni sheet (as the working electrode) is placed in the above solution, the Cu rod is used as the counter electrode, and the silver silver chloride electrode is used as the reference electrode. On the electrochemical workstation, the method of constant potential (-0.1V) is used for electrodeposition for 5s. , to prepare Ni-Cu binary catalyst. Weigh sodium borohydride, and dissolve it in 2mol / L sodium hydroxide solution to prepare 0.27mol / L sodium borohydride solution, mix well and use it as electrolyte for direct sodium borohydride fuel cell. 2cm 2 The Ni sheet and Ni-Cu were used as the working electrode, the mercury oxide mercury electrode was used as the reference electrode, and the graphite rod was used as the auxiliary electrode, and the constant current discharge performance test was carried out.

[0023] Figure 5 is at ...

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Abstract

Provided is a Ni-Cu binary catalyst for improving performance of direct borohydride fuel cells. The catalyst is characterized by being prepared by the following steps: (1) preparing 0.25 mol / L of a CuSO4 solution in an acidic condition under normal pressure at a temperature in a range of 293.15 to 313.15K; (2) arranging a tri-electrode system, wherein 2 cm<2> of a Ni sheet used as a working electrode is put in the CuSO4 solution, a Cu rod is used as a counter electrode and a silver / silver chloride electrode is used as a reference electrode; (3) carrying out electrodeposition for 5 s by the potentiostatic method with the constant potential of -0.1V on an electrochemical work station so as to obtain the Ni-Cu binary catalyst. The Ni-Cu binary catalyst enhances direct oxidation performance of BH4<->, abates corrosion of an electrolyte to the Ni anode, reduces charge transfer resistance and improves discharge efficiency.

Description

technical field [0001] The invention belongs to the field of electrochemical applications, in particular to a Ni-Cu binary catalyst for improving the performance of a direct boron-hydrogen fuel cell. Background technique [0002] At present, metal catalysts such as Ni, Pt, Pd, and Au are usually used to improve the performance of direct boron-hydrogen fuel cells. Since noble metal anode catalysts such as Au, Pt, and Pd are expensive, efforts to develop non-noble metal Ni anode catalysts have become a research focus. However, when using Ni as the anode catalyst in the prior art, BH 4 - The direct oxidation performance of Ni is not high, the Ni electrode is easy to corrode, the charge transfer resistance is large, and the fuel utilization rate is low. Contents of the invention [0003] Purpose of the present invention is exactly in order to overcome above-mentioned deficiencies in the prior art, a kind of binary catalyst that improves direct boron hydrogen fuel cell perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCY02E60/50
Inventor 余丹梅申燕陈昌国王洁
Owner CHONGQING UNIV
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