Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 268, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118450
Keywords
Fuel cells; Oxygen reduction reaction; Platinum; Matryoshka; Membrane-electrode assembly
Funding
- Institute for Basic Science (IBS) in Korea [IBS-R006-A2]
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science and ICT [NRF-2018M1A2A2063172]
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Electrochemical catalysts with a core-shell structure have received much attention because of their enhanced efficiency and activity. Among them, those with a CuPd alloy core exhibit better activity than the ones with a single metal Pd core, which is known to be an excellent core-material. However, the superior performance of previously reported Pt catalysts with CuPd core has only been observed in half-cells, and was not reflected or even expanded to single-cells. We report catalysts having a Matryoshka-like structure with a Pt outer-layer, Cu interlayer, and Pd core for oxygen reduction reaction. This catalyst has 14 times higher Pt mass activity than the commercial PVC in half-cells, and also performs better in single-cells at only 0.056 mgp t cm(-2). Particularly, the stability of this catalyst satisfies the 2020 DOE target, and electrochemical surface area loss during the stability test is only 40 % for this catalyst, while that of Pt/C is 80 %.
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