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A nanometer electro-catalyst for fuel cell and its manufacture method

A fuel cell and electrocatalyst technology, which is applied in catalyst activation/preparation, battery electrode, nanostructure manufacturing, etc., can solve the problems of high price and reduce fuel cell cost, and achieve the effect of reducing cost and improving catalytic utilization rate.

Inactive Publication Date: 2007-05-16
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Dan Zhao et al. (Zhao D, Xu BQ ANGEWANDTE CHEMIE-INTERNATIONAL EDITION.2006, 45(30): 4955-4959) wrapped a thin layer of Pt on the Au core of about 10nm, thus obtaining nearly 100% Pt utilization efficiency, however Au is also a precious metal, and the price is relatively expensive, so the degree of reducing the cost of fuel cells is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare 1×10 -3 M NiSO 4 200mL of ethylene glycol solution, add 0.025g of Carbot VC-72R carbon carrier, and mix well, then add N 2 h 4 (50%) 5g, adjust the pH value of the system to 12 with 1M KOH or NaOH, add N after stirring the reaction for 5h at 90°C 2 h 4 (50%) 5g and 1×10 -3 MHPtCl 6 20mL of ethylene glycol solution, adjust the pH value of the system to 12 with 1M NaOH, continue to stir and react at 90°C for 5h, centrifuge after the reaction, wash the obtained precipitate and vacuum dry to obtain carbon-supported Pt and Ni The core-shell structure electrocatalyst product with a ratio of 1:10, the sample is NP1.

Embodiment 2

[0025] Prepare 10×10 -3 MNiCl 2 200mL of ethylene glycol solution, add 0.25g of CarbotVC-72R carbon support, and mix well, then add N 2 h 4 (50%) 10g, adjust the pH value of the system to 11 with 1M KOH or NaOH, add N after stirring at 80°C for 3h 2 h 4 (50%) 10g and 10×10 -3 MHPtCl 6 40mL of ethylene glycol solution, adjust the pH of the system to 11 with 1M KOH, continue to stir and react at 80°C for 3h, centrifuge after the reaction, wash the obtained precipitate and vacuum dry to obtain carbon-supported Pt and Ni The core-shell structure electrocatalyst product with a ratio of 2:10, the sample is NP2.

Embodiment 3

[0027] Prepare 50×10 -3 M Ni(NO 3 ) 2 200mL of ethylene glycol solution, add 1g of Carbot VC-72R carbon support, and mix well, then add N 2 h 4 (50%) 20g, adjust the pH value of the system to 12 with 1M NaOH, add N after stirring the reaction for 2h at 60°C 2 h 4 (50%) 20g and 50×10 -3 MHPtCl 6 100mL of ethylene glycol solution, adjust the pH value of the system to 12 with 1M KOH, continue to stir and react at 60°C for 2h, centrifuge after the reaction, wash the obtained precipitate and vacuum dry to obtain carbon-supported Pt and Ni The core-shell structure electrocatalyst product with a ratio of 5:10, the sample is NP3.

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PUM

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Abstract

The preparation method for electric catalyst of fuel cell comprises: selecting 3-50nm nano Ni as core and thin Pt or PtRu as shell, wherein the rate between Ni and Pt or PtRu is 10:10~100; selecting the load capacity of Pt or PtRu on C carrier as 10-60%; preparing the glycol solution of NiSO4, NiCl2 or Ni(NO3)2; adding C carrier and N2H4, adjusting pH value by KOH or NaOH; adding glycol solution of HPtCl6 or mixture of HPtCl6 and RuCl3; adjusting pH value; separating, cleaning, and drying. This invention can improve noble metal utility and reduces cell cost.

Description

technical field [0001] The invention relates to a fuel cell electrocatalyst, in particular to a fuel cell electrocatalyst with nano Ni metal as the core and a thin layer of Pt or PtRu alloy noble metal as the shell and a preparation method thereof. Background technique [0002] Environmental pollution and fossil energy depletion are very important issues affecting human survival and development. Since a fuel cell is a device that directly converts the chemical energy stored in fuel and oxidant into electrical energy through an electrochemical reaction, it has the incomparable advantages of traditional thermal energy conversion devices such as high energy conversion efficiency and environmental friendliness of the reaction product, so The research and development of fuel cells has received great attention. When the fuel cell is working, the fuel in the anode (such as H 2 , N 2 h 4 , sodium borohydride, methanol and other small organic molecules) and oxygen or H in the cat...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/92H01M4/88B01J37/00B82B1/00B82B3/00
CPCY02E60/50
Inventor 廖代伟符显珠梁营王新林敬东
Owner XIAMEN UNIV
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