On-line mass spectrometry for ethanol oxidation on well-defined Sn/Pt(hkl) electrode surfaces

H. Nakamura, T. Inoue, T. Matsuda, N. Todoroki, T. Wadayama

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

Abstract

Onset potentials of ethanol oxidation reaction (EOR) and potential-dependent evolution of gaseous products from well-defined Sn/Pt(hkl) electrode surfaces were investigated. The electrode surfaces were prepared by vacuum deposition of Sn on a Pt(hkl) single-crystal substrate in ultra-high vacuum. The EOR onset potentials of anodic currents for Sn/Pt(hkl) shifted to lower potentials in comparison to unmodified Pt(hkl). Online electrochemical mass spectrometry (OLEMS) analysis of the gaseous products formed on the Sn/Pt(hkl) surfaces showed that acetaldehyde, rather than CO2, was generated at lower applied voltages and that the product evolution was sensitive to the atomic arrangement of the surface Pt (Pt(hkl)). EOR anodic current measurements and OLEMS analysis showed that EOR onset potential is the lowest for Sn/Pt(110). The findings can be attributed to the effectiveness of Pt(110) steps in ethanol C-C bond cleavage and an ensemble effect of the Pt and Sn atoms against CO poisoning.

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.
Pages1029-1033
Number of pages5
Edition14
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2016 Jan 1
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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