Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies

N. M. Markovic; H. A. Gasteiger; P. N. Ross

doi:10.1021/j100011a001

Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies

N. M. Markovic, H. A. Gasteiger, P. N. Ross

Lawrence Berkeley National Laboratory

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Abstract

The first results of a study of the oxygen reduction reaction on a rotating ring-disk electrode using single-crystal Pt disk electrodes are presented. The order of activity of Pt(hkl) in H₂SO₄ increased in the sequence (111) < (100) < (110). These differences are attributed to the structure sensitivity of (bi)sulfate anion adsorption and its inhibiting effect. Very small fluxes (I_R/N < 0.01I_D) of peoxide were detected at the ring at potentials above 0 V (SCE) on all surfaces. However, below 0 V absorbed hydrogen affected the partial reduction of oxygen to H₂O₂ in the order (111) < (100) > (110), with 100% H₂O₂ formation on Pt(111).

Original language	English
Pages (from-to)	3411-3415
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	99
Issue number	11
DOIs	https://doi.org/10.1021/j100011a001
State	Published - 1995
Externally published	Yes

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title = "Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies",

abstract = "The first results of a study of the oxygen reduction reaction on a rotating ring-disk electrode using single-crystal Pt disk electrodes are presented. The order of activity of Pt(hkl) in H2SO4 increased in the sequence (111) < (100) < (110). These differences are attributed to the structure sensitivity of (bi)sulfate anion adsorption and its inhibiting effect. Very small fluxes (IR/N < 0.01ID) of peoxide were detected at the ring at potentials above 0 V (SCE) on all surfaces. However, below 0 V absorbed hydrogen affected the partial reduction of oxygen to H2O2 in the order (111) < (100) > (110), with 100% H2O2 formation on Pt(111).",

author = "Markovic, {N. M.} and Gasteiger, {H. A.} and Ross, {P. N.}",

year = "1995",

doi = "10.1021/j100011a001",

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journal = "Journal of Physical Chemistry",

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T1 - Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies

AU - Markovic, N. M.

AU - Gasteiger, H. A.

AU - Ross, P. N.

PY - 1995

Y1 - 1995

N2 - The first results of a study of the oxygen reduction reaction on a rotating ring-disk electrode using single-crystal Pt disk electrodes are presented. The order of activity of Pt(hkl) in H2SO4 increased in the sequence (111) < (100) < (110). These differences are attributed to the structure sensitivity of (bi)sulfate anion adsorption and its inhibiting effect. Very small fluxes (IR/N < 0.01ID) of peoxide were detected at the ring at potentials above 0 V (SCE) on all surfaces. However, below 0 V absorbed hydrogen affected the partial reduction of oxygen to H2O2 in the order (111) < (100) > (110), with 100% H2O2 formation on Pt(111).

AB - The first results of a study of the oxygen reduction reaction on a rotating ring-disk electrode using single-crystal Pt disk electrodes are presented. The order of activity of Pt(hkl) in H2SO4 increased in the sequence (111) < (100) < (110). These differences are attributed to the structure sensitivity of (bi)sulfate anion adsorption and its inhibiting effect. Very small fluxes (IR/N < 0.01ID) of peoxide were detected at the ring at potentials above 0 V (SCE) on all surfaces. However, below 0 V absorbed hydrogen affected the partial reduction of oxygen to H2O2 in the order (111) < (100) > (110), with 100% H2O2 formation on Pt(111).

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VL - 99

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JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 11

ER -

Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies

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