Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100)

Markovic, N; Ross, Jr, P N

doi:10.1021/j100140a039

Title: Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100)

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Abstract

The electrochemical oxidation of formic acid on Pt was studied in acidic supporting electrolyte using single-crystal electrodes. Very well-defined periodic (not chaotic) current oscillations on a stationary Pt(100) electrode were observed under both potentiodynamic and potentiostatic conditions. The oscillatory behavior is strongly dependent on the Pt surface structure and is seen on the (100) surface but not on the (111) surface. The periodicity, the amplitude, and the absolute magnitude of the current oscillations depends on at least three variables, electrode potential and potential history, formic acid concentration, and the anion of the supporting electrolyte. The pH of the electrolyte was not found to be an important variable, nor was mass transport, e.g. rotation or stirring. The behavior is extremely complex and difficult to analyze in terms of known electrode processes. 33 refs., 11 figs.

Authors:

Markovic, N; Ross, Jr, P N ^[1]

Lawrence Berkeley Lab., CA (United States)

Publication Date:: Thu Sep 23 00:00:00 EDT 1993

OSTI Identifier:: 5651667

DOE Contract Number:: AC03-76SF00098

Resource Type:: Journal Article

Journal Name:: Journal of Physical Chemistry; (United States)

Additional Journal Information:: Journal Volume: 97:38; Journal ID: ISSN 0022-3654

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FORMIC ACID; OXIDATION; PLATINUM; SURFACE PROPERTIES; CATALYSTS; ELECTRIC CURRENTS; ELECTROCHEMISTRY; ELECTRODES; ELECTROLYTES; MONOCRYSTALS; OSCILLATIONS; CARBOXYLIC ACIDS; CHEMICAL REACTIONS; CHEMISTRY; CRYSTALS; CURRENTS; ELEMENTS; METALS; MONOCARBOXYLIC ACIDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PLATINUM METALS; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties; 400400 - Electrochemistry

Citation Formats


                    Markovic, N, and Ross, Jr, P N. Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100).  United States: N. p., 1993. 
        Web.  doi:10.1021/j100140a039.

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                    Markovic, N, & Ross, Jr, P N. Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100).  United States.  https://doi.org/10.1021/j100140a039

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                    Markovic, N, and Ross, Jr, P N. 1993.  
        "Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100)".  United States.  https://doi.org/10.1021/j100140a039.

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@article{osti_5651667,

  title        = {Oscillatory behavior in the electrochemical oxidation of formic acid on Pt(100)},

  author       = {Markovic, N and Ross, Jr, P N},

  abstractNote = {The electrochemical oxidation of formic acid on Pt was studied in acidic supporting electrolyte using single-crystal electrodes. Very well-defined periodic (not chaotic) current oscillations on a stationary Pt(100) electrode were observed under both potentiodynamic and potentiostatic conditions. The oscillatory behavior is strongly dependent on the Pt surface structure and is seen on the (100) surface but not on the (111) surface. The periodicity, the amplitude, and the absolute magnitude of the current oscillations depends on at least three variables, electrode potential and potential history, formic acid concentration, and the anion of the supporting electrolyte. The pH of the electrolyte was not found to be an important variable, nor was mass transport, e.g. rotation or stirring. The behavior is extremely complex and difficult to analyze in terms of known electrode processes. 33 refs., 11 figs.},

  doi          = {10.1021/j100140a039},

  url          = {https://www.osti.gov/biblio/5651667},
  journal      = {Journal of Physical Chemistry; (United States)},

  issn         = {0022-3654},

  number       = ,

  volume       = 97:38,

  place        = {United States},

  year         = {Thu Sep 23 00:00:00 EDT 1993},

  month        = {Thu Sep 23 00:00:00 EDT 1993}

}

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