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Volumn 104, Issue 42, 2000, Pages 9772-9776

How to make electrocatalysts more active for direct methanol oxidation - avoid PtRu bimetallic alloys!

Author keywords

[No Author keywords available]

Indexed keywords

BINARY ALLOYS; CATALYSIS; ELECTROCHEMISTRY; FUEL CELLS; METHANOL; OXIDATION; PHASE SEPARATION;

EID: 0034297445     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp001954e     Document Type: Article
Times cited : (353)

References (61)
  • 34
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    • note
    • 22
  • 41
    • 0342983976 scopus 로고    scopus 로고
    • note
    • 0 remains at the surface of Pt - Ru blacks reduced at 100 °C.
  • 44
    • 0342549584 scopus 로고    scopus 로고
    • note
    • 2-reduced Ru metal black.
  • 46
    • 0343855218 scopus 로고    scopus 로고
    • note
    • 34 Unlike most electrode preparations for fuel-cell-grade nanoscale materials (e.g., ref 7), this approach does not require preparing a modified electrode in which the catalyst is either dispersed in a liquid or exposed to a polymer binder to hold the particles at the electrode surface. Our use of sticky carbon as a conductive wax allows a direct measurement of the electroactivity of the chemically treated solid without introducing any other steps that might alter the chemical states of the Pt and Ru.
  • 47
    • 0000622495 scopus 로고    scopus 로고
    • Leddy, J., Vanysek, P., Porter, M. D., Eds.; Electrochemical Society: Permington, NJ
    • Long, J. W.; Rolison, D. R. In New Directions in Electroanalytical Chemistry; Leddy, J., Vanysek, P., Porter, M. D., Eds.; Electrochemical Society: Permington, NJ, 1999; p 125.
    • (1999) New Directions in Electroanalytical Chemistry , pp. 125
    • Long, J.W.1    Rolison, D.R.2
  • 51
    • 0343855217 scopus 로고    scopus 로고
    • note
    • 4 electrolyte under rotating electrode conditions (500 rpm); after each potential step, the steady-state current was recorded at 300 s. All currents are mass-normalized. The initial step starts from +70 mV vs NHE, which poises the Pt surface in a chemical state that allows electrosorption of methanol.
  • 52
    • 0343419381 scopus 로고    scopus 로고
    • note
    • 2-reduced Pt - Ru, respectively).
  • 53
    • 0342549582 scopus 로고    scopus 로고
    • note
    • 2-reduced powders in acetone and pipetting the solution onto carbon-film-coated Cu grids.
  • 54
    • 0343855216 scopus 로고    scopus 로고
    • note
    • 2 electron diffraction could result from the lower scattering factor, a lower volume fraction, poorer crystallinity due to hydration, or a smaller average crystallite size of the oxide, as compared to the metal.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.