Oxygen reduction on single crystal platinum electrodes in phosphoric acid solutions | Zendy

Auro Atsushi Tanaka | Zendy; Radoslav R. Adžić | Zendy; Biljaikolić | Zendy

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Oxygen reduction on single crystal platinum electrodes in phosphoric acid solutions

Author(s) -

Auro Atsushi Tanaka,

Radoslav R. Adžić,

Biljaikolić

Publication year - 1999

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc9911695t

Subject(s) - phosphoric acid , platinum , chemistry , oxygen , electron transfer , catalysis , electrode , adsorption , kinetics , inorganic chemistry , oxygen reduction reaction , electrochemistry , physics , organic chemistry , quantum mechanics , biochemistry

Oxygen reduction reaction has been studied on Pt low index planes in 0.1 M and 85% H3PO4 using hanging meniscus rotating disc electrode technique. The first-order kinetics of O2 reduction reaction was found for all three surfaces in a four-electron process with the first electron transfer rate determining in both 0.1 M and 85% H2PO4 solutions. Catalytic activity for O2 reduction follows the sequence Pt (110)>Pt (100)>Pt (111). Structural dependence is predominantly determined by the adsorption of phosphoric acid anions, which is strongly structure-dependent on Pt surfaces.

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