Oxygen reduction reaction activity and durability for Pt/TaNxmodel catalysts fabricated inultra-high-vacuum

S. Takahashi, N. Takahashi, N. Todoroki, T. Tanabe, T. Wadayama

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

4 Citations (Scopus)


The electrochemical structural stability of Pt-shell/Ta nitride-core nanoparticles (Pt/TaNxNPs) on a highly oriented pyrolytic graphite (HOPG) substrate was investigated under the application of square-wave potential cycling in 0.1 M HClO4. The Pt/TaNx/HOPG samples were fabricated through arc-plasma deposition (APD) of TaNxNPs, followed by electron-beam evaporation of Pt inultra-high vacuum (UHV). X-ray diffraction and X-ray photoelectron spectroscopy results present strong evidence of tantalum nitride generation by the APD of tantalum under the introduction of nitrogen (0.1 Pa) into the UHV chamber. Evaluation of the oxygen reduction reaction (ORR) activity of the catalysts after applying square-wave potential cycling between 0.6 and 1.0 V clearly shows that the nitridation of transition-metal cores is effective for improving the ORR activityand durability of core-shell type NP catalysts.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 16, PEFC 16
EditorsD. J. Jones, H. Uchida, H. A. Gasteiger, K. Swider-Lyons, F. N. Buchi, P. N. Pintauro, B. S. Pivovar, K. E. Ayers, K. A. Perry, P. Shirvanian, A. Z. Weber, V. K. Ramani, P. Strasser, R. A. Mantz, K. Shinohara, S. Mitsushima, C. Coutanceau, J. M. Fenton, T. J. Schmidt, T. F. Fuller, S. R. Narayanan, Y. T. Kim, L. Zhuang, S. G. Sun
PublisherElectrochemical Society Inc.
Number of pages6
ISBN (Electronic)9781607687313, 9781607687672, 9781607687689, 9781607687696, 9781607687702, 9781607687719, 9781607687726, 9781607687733, 9781607687740, 9781607687757, 9781607687771, 9781607687788, 9781607687795, 9781607687801, 9781607687818, 9781607687825, 9781607687832, 9781607687849, 9781607687856, 9781607687863, 9781607687887, 9781607687894, 9781607687900, 9781607687917, 9781607687924, 9781607687931, 9781607687948, 9781607687955, 9781607687962, 9781607687979, 9781607687986, 9781607687993, 9781607688006, 9781607688013, 9781607688020, 9781607688037
Publication statusPublished - 2016
Externally publishedYes
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
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


ConferenceSymposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Engineering(all)


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