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 reducing fuel cell cost and high price, and achieve the effect of improving catalytic utilization rate and reducing cost.

Inactive Publication Date: 2008-12-10
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 of the system to 12 with 1M KOH or NaOH, stir and react at 90°C for 5h, then add N 2 H 4 (50%) 5g and 1×10 -3 MHPtCl 6 20mL of the ethylene glycol solution, adjust the pH of the system to 12 with 1M NaOH, continue to stir and react at 90℃ for 5h, after the reaction is finished, centrifuged and the precipitate obtained is washed and dried in vacuum to obtain carbon-supported Pt and Ni The core-shell structure electrocatalyst product with a ratio of 1:10, the sample is designated as NP1.

Embodiment 2

[0025] Prepare 10×10 -3 MNiCl 2 200mL of ethylene glycol solution, add 0.25g of Carbot VC-72R carbon carrier, and mix well, then add N 2 H 4 (50%) 10g, adjust the pH of the system to 11 with 1M KOH or NaOH, stir and react at 80℃ for 3h, then add N 2 H 4 (50%) 10g and 10×10 -3 MHPtCl 6 Adjust the pH of the system to 11 with 1M KOH, and continue to stir and react for 3 hours at 80℃. After the reaction, the precipitate is centrifuged and the precipitate is washed and dried in vacuum to obtain carbon-supported Pt and Ni. The core-shell structure electrocatalyst product with a ratio of 2:10, the sample is marked as 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 carrier, mix well, and then add N 2 H 4 (50%) 20g, adjust the pH of the system to 12 with 1M NaOH, stir and react at 60℃ for 2h, then add N 2 H 4 (50%) 20g and 50×10 -3 MHPtCl 6 100mL of ethylene glycol solution, adjust the pH of the system to 12 with 1M KOH, continue to stir and react at 60℃ for 2h, after the reaction is finished, centrifugal separation and the resulting precipitate will be washed and dried in vacuum to obtain carbon-supported Pt and Ni The core-shell structure electrocatalyst product with a ratio of 5:10, the sample is designated as NP3.

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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 using nano-Ni metal as a core and a thin layer of Pt or PtRu alloy noble metal as a shell and a preparation method thereof. Background technique [0002] Environmental pollution and fossil energy depletion are very important issues affecting human survival and development. Because the fuel cell is a device that directly converts the chemical energy stored in the fuel and oxidizer into electrical energy through an electrochemical reaction, it has the advantages of high energy conversion efficiency and environmental friendliness of the reaction products, such as the incomparable advantages of traditional thermal engine energy conversion devices, so People attach great importance to the research and development of fuel cells. When the fuel cell is working, it relies on the electrocatalyst to remove the fuel in the anode (such as H 2 , N 2 H 4 , Sodium borohydride...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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