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Method for preparing Ru-based/Pt skin film nano-film electrode for fuel cell

A fuel cell, nano-film technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of inability to directly apply measurement and high Pt content

Active Publication Date: 2010-09-22
SHANGHAI UNIVERSITY OF ELECTRIC POWER +1
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems that the existing Pt-Ru binary catalytic materials have high Pt content and cannot be directly applied to on-site ATR-SEIRAS measurement, and provide a method that can be prepared on the ATR infrared window Si substrate with ultra-low Pt content and has Ru-based / Pt skin-film nanofilms with SEIRA effect

Method used

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  • Method for preparing Ru-based/Pt skin film nano-film electrode for fuel cell
  • Method for preparing Ru-based/Pt skin film nano-film electrode for fuel cell
  • Method for preparing Ru-based/Pt skin film nano-film electrode for fuel cell

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Embodiment 1

[0024] Preparation of a Ru-based / Pt skin nano-film working electrode

[0025] First, electroless gold plating is performed on the reflective bottom of the semicircular silicon column; a 5-6 nm thick Ru film can be electrodeposited on the gold substrate by a two-step wet method; Above 0.005M CuSO 4 +0.1M H 2 SO 4 Cu was underpotentially deposited at 0.025V saturated calomel electrode in the solution for 180s, and then rapidly added to 0.005M K 2 PtCl 4 +0.1MH 2 SO 4 Substitute Pt in the solution and let it stand for 10 minutes to make the replacement reaction complete.

[0026] PtRu binary nanofilm electrodes with different Pt loadings can be obtained through different underpotential deposition Cu-substitution cycles.

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Abstract

The invention discloses a method for preparing a Ru-based / Pt skin film nano-film electrode for a fuel cell. The method comprises the following steps of: chemically plating gold on a reflecting bottom surface of a semi-circle silicon column; electroplating a Ru film with the thickness of 5 to 6nm on a gold substrate by using a two-step wet method; then covering a Pt layer on the Ru film nano-electrode by an under potential deposition Cu spontaneous substitution method; and repeating the deposition / substitution for 1 to 4 times to obtain the Ru-based / Pt skin film nano-film electrode for the fuel cell. The Ru-based / Pt skin film nano-film electrode prepared by the method of the invention has the characteristics of ultrathin Pt content and controllable Pt carrying capacity; and in addition, the Ru-based / Pt skin film nano-film electrode prepared by the spontaneous substitution method has catalytic activity, can be applied to field ATB-SEIRAS research, obtains an obvious specific surface infrared spectrum signal for adsorption species and displays the synergistic effect of the Pt-Ru catalyst.

Description

technical field [0001] The invention belongs to the technical field of thin-film electrode preparation, and in particular relates to an ultra-low Pt content and to CO and CH 3 The invention discloses a preparation method of a Ru base / Pt skin film nano film electrode with higher catalytic activity of OH. The thin-film electrode can be used for attenuated total reflection surface-enhanced infrared spectroscopy (ATR-SEIRAS) to study electrocatalytic processes in situ. Background technique [0002] Surface electrochemistry for fuel cell catalysts has always been the main content of electrocatalysis research, and its related research has also shifted from earlier single-crystal electrodes to nanostructured thin-film electrodes. The driving force is the final design and development of high-activity, Anode and cathode catalysts with low Pt loading [1] . The catalytic reaction is a surface reaction, and most of the catalyst in the bulk phase of the catalyst is not fully utilized,...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 李巧霞徐群杰周小金李金光
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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