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Pt-P catalyst for fuel cells
RISE - Research Institutes of Sweden, Safety and Transport, Electronics. Jönköping University, Sweden.
FEM Forschungsinstitut Edelmetalle Metallchemie, Germany.
FEM Forschungsinstitut Edelmetalle Metallchemie, Germany.
RISE - Research Institutes of Sweden, Safety and Transport, Electronics. Jönköping University, Sweden.ORCID iD: 0000-0002-7095-1907
2019 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Fuel cell technology is becoming increasingly important in a society where the energy system is changing toward a high degree of electrification based on fossil-free primary sources of energy. Among commercial fuel cells, PEM (polymer electrolyte membrane) technology is dominating and the production is doubled each year. The reason for PEM technology being so prosperous is the ability of the industry to manufacture thin film materials (electrodes, membranes and protective films on bipolar plates), while also reaching high current densities. In order to improve the efficiency, catalysts are applied in the electrodes. These improvements have been achieved during the last decades thanks to significant materials development of membranes and electrodes, including micro- and nano-structuring and catalyst development by materials-doping. Thus, PEM technology has a strong potential to offer sustainable, cost effective and flexible solutions.

However, PEM technology is sensitive to contamination of catalysts and membrane. Additionally, the demanding internal environment (chemistry, temperature, pressure, and dynamic operation make the conditions very harsh) poses complex challenges in terms of durability. Therefore, there are still challenges to overcome to make PEM technology more efficient and robust and thereby beneficial. The most important areas of materials development to reduce the cost of PEM fuel cells are

  • High-performance electrode catalysts enabling ultra-low precious metal loading,
  • Lower cost, lighter, corrosion-resistant bipolar plates,
  • Low cost, high-performance membranes.

The purpose of the present work is synthesis of catalytic Pt and PtP nanoparticles onto the gas diffusion layer (GDL) of PEM fuel cells by electrodeposition, and in a next step to study aging during fuel cell testing.

Pt particles with varying P concentration are electrodeposited onto the carbon paper GDL. The concentrations used were 0 at% P, 1 at% P and 10 at% P. The GDL is activated by plasma etching prior to electroplating. The electrolyte used, contained 8 gL-1 Pt as Pt(NO2)2(NH3)2, 70 gL-1  NaCH3COOH and 100 gL-1  Na2CO3. Phosphorous was added in the form of H3PO3. Pulsed electrodeposition was performed at a temperature of 30 °C with an on-time of 0.005 seconds and off-time of 0.195 s. The peak current was 5 A.

Place, publisher, year, edition, pages
2019.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-39313OAI: oai:DiVA.org:ri-39313DiVA, id: diva2:1334433
Conference
4th WORKSHOP e-MINDs, COST Action MP1407, Milano, 13-15/2, 2019
Available from: 2019-07-02 Created: 2019-07-02 Last updated: 2019-07-03Bibliographically approved

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Leisner, Peter

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