Journal
ELECTROCATALYSIS
Volume 13, Issue 2, Pages 175-181Publisher
SPRINGER
DOI: 10.1007/s12678-021-00699-y
Keywords
Oxygen reduction reaction; Pt3Fe single-crystal electrodes; Tetra-n-hexylammonium cation; Melamine; [MTBD][beti] ionic liquid
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Funding
- New Energy and Industrial Technology Development Organization (NEDO)
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The oxygen reduction reaction (ORR) on low-index planes of Pt3Fe in O-2-saturated 0.1 M HClO4 was studied. It was found that Pt3Fe (111) has 20 times higher ORR activity compared to Pt (111). Furthermore, the ORR activity on low-index planes of Pt3Fe can be further improved by modifying the electrodes with hydrophobic species.
The oxygen reduction reaction (ORR) on the low-index planes of Pt3Fe in O-2 -saturated 0.1 M HClO4 is studied using the hanging-meniscus rotating-disk electrode method. The ORR activity increases as follows: Pt3Fe (100) < Pt3Fe (110) < Pt3Fe (111). The ORR activity of Pt3Fe (111) is 20 times higher than that of Pt (111). The ORR activities on the low-index planes of Pt3Fe are improved by modifying the electrodes with hydrophobic species, such as the tetra-n-hexylammonium (THA(+)) cation, melamine, and the protonic ionic liquid [7-methyl-1,5,7-triazabicyclo [4.4.0] dec-5-ene] [bis(pentafluoroethylsulfonyl) imide]. The ORR activity of melamine-modified Pt3Fe (111) is 1.4 times higher than that of bare Pt3Fe (111).
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