期刊
ADVANCED MATERIALS
卷 33, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202007885
关键词
fuel cells; lattice strain; membrane electrode assembly; oxygen reduction reaction; rotating disk electrodes
类别
资金
- Volkswagen Group of America
- National Science Foundation [ECCS-1542152]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- Austrian Science Fund (FWF) [J3980-N27]
Lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition exhibit remarkable catalytic performance for the oxygen reduction reaction (ORR). Further optimization of nanoparticle geometry and ionomer/carbon interactions enable high mass activity in membrane electrode assembly. However, attention should be directed towards improving high performance in the high-current-density region for high-power-density hydrogen fuel cells.
The design and fabrication of lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the oxygen reduction reaction (ORR), measured in both half-cell and full-cell configurations, is attributed to the observed lattice strain. By further optimizing the nanoparticle geometry and ionomer/carbon interactions, mass activity close to 0.8 A mg(Pt)(-1) @0.9 V iR-free is achievable in the membrane electrode assembly. Nevertheless, active catalysts with high ORR activity do not necessarily lead to high performance in the high-current-density (HCD) region. More attention shall be directed toward HCD performance for enabling high-power-density hydrogen fuel cells.
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