ORR properties for model Pt-shell layers prepared on nitrogen-beam irradiated Pt25Ni75(111) substrate

M. Asano, R. Kawamura, N. Todoroki, T. Wadayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We evaluated the oxygen reduction reaction (ORR) properties of ultra-thin Pt shell layers prepared on nitrogen ion beam (N2+ beam), and neutralized nitrogen ion beam (N20 beam) irradiated Pt25Ni75(111) substrates. Although the non-N2 irradiated 0.9-nm-thick Pt layers on Pt25Ni75(111) (Pt0.9nm/Pt25Ni75(111)) showed a kinetic-controlled current density (jk) of 7.7 mA/cm2, the jk values for the Pt0.9nm/N2+-Pt25Ni75(111) and Pt0.9nm/N20-Pt25Ni75(111) pristine surfaces are 6.6 and 6.3 mA/cm2, respectively. In contrast, the N20 beam irradiated sample displayed better durability by retaining ca. 90% of the initial jk value, while the jk values for the N2+ irradiated and non-irradiated samples decreased to ca. 70% and 60%, respectively, of the initial value. The result suggests that N20 beam irradiation on the Pt25Ni75(111) substrate is effective for the electrochemical stabilization of the ultra-thin Pt-shell layers.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 16, PEFC 16
EditorsD. J. Jones, F. N. Buchi, B. S. Pivovar, T. F. Fuller, A. Z. Weber, L. Zhuang, C. Coutanceau, P. N. Pintauro, K. E. Ayers, V. K. Ramani, P. Strasser, R. A. Mantz, S. R. Narayanan, S. Mitsushima, T. J. Schmidt, S. G. Sun, H. Uchida, H. A. Gasteiger, K. Swider-Lyons, J. M. Fenton, Y. T. Kim, K. A. Perry, P. Shirvanian, K. Shinohara
PublisherElectrochemical Society Inc.
Pages809-814
Number of pages6
Edition14
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2016
EventSymposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2016 Oct 22016 Oct 7

Publication series

NameECS Transactions
Number14
Volume75
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSymposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period16/10/216/10/7

ASJC Scopus subject areas

  • Engineering(all)

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