Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 165, Issue 6, Pages F3036-F3044Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0041806jes
Keywords
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Funding
- French National Research Agency PROG-ELEC program [ANR-12-PRGE-007]
- European Union's Seventh Framework Program for the Fuel Cells and Hydrogen Joint Technology Initiative [325239]
- Capenergies and Tenerrdis
- Centre of Excellence of Multifunctional Architectured Materials CEMAM [AN-10-LABX-44-01]
- French IUF
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Tin dioxide is a promising catalyst support to improve the stability of proton-exchange membrane fuel cells (PEMFC) cathodes at high voltages. However, optimizing the catalytic activity for the oxygen reduction reaction (ORR) of tin dioxide based electrocatalyst still remains challenging. In this study, an antimony doped tin dioxide (ATO) aerogel featuring suitable physico-chemical properties for application at a PEMFC cathode was successfully synthetized. Two platinum nanoparticles deposition methods were tested and compared. One is a chemical reduction route (using ethylene glycol, EG), the other uses ultraviolet (UV) irradiation followed by different thermal post-treatments. Electrocatalysts structure and morphology were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments. The highest ORR mass activity measured in liquid electrolyte at 25 degrees C was obtained for Pt/ATO from EG method (32 A gPt(-1) versus 27 A gPt(-1) for a reference Pt/HSAC 40 wt%). Pt/ATO turned out to be more stable than Pt/HSAC during an accelerated stress test composed of 5,000 potential cycles between 1.0 and 1.5 V vs. RHE at 80 degrees C. (C) The Author(s) 2018. Published by ECS.
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