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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 problems such as high Pt content and inability to directly apply measurement

Active Publication Date: 2012-05-23
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 Peptide Nanofilm Working Electrode

[0025] First, electroless gold plating is performed on the reflective bottom surface 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; then the Pt layer is covered by a spontaneous displacement method on the Ru electrode, that is, on the Ru film electrode on 0.005M CuSO 4 +0.1M H 2 SO 4 Cu was deposited in solution with a saturated calomel electrode underpotential at 0.025 V for 180 s, followed by rapid addition to 0.005 M K 2 PtCl 4 +0.1MH 2 SO 4 The Pt was replaced in the solution, and the solution was allowed to stand for 10 min to complete the replacement reaction.

[0026] PtRu binary nanofilm electrodes with different Pt loadings can be obtained after different underpotential deposition Cu-replacement 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 a kind of ultra-low Pt content that is resistant to CO and CH 3 The preparation method of Ru-based / Pt skin-film nano-film electrode with high 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. Anode and cathode catalysts with low Pt loading [1] . The catalytic reaction is a surface reaction, and most of the catalyst in the catalyst bulk phase is not fully utilized, resulting in a waste of catalyst. Therefore, although the Pt-Ru alloy catalyst ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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